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115 results on '"George R. Kalbfleisch"'

1. Search for squarks and gluinos in events containing jets and a large imbalance in transverse energy

Author

V. V. Babintsev, Jianming Qian, G. Briskin, Tong Hu, T. Mc Mahon, T. Joffe-Minor, H. E. Fisk, Z. Zhou, J. Solomon, P. Padley, Alexey Volkov, C. Klopfenstein, G. Wang, Alberto Santoro, B. May, Seong Keun Kim, J. Mc Donald, T. Fahland, James H Cochran, Mitchell Wayne, D. Shpakov, M. Abolins, H. Schellman, J. M. Kohli, B. G. Pope, L. Magaña-Mendoza, D. Buchholz, P. Hanlet, Stefan Grünendahl, D. Coppage, J. Thompson, Elizabeth Gallas, F. Lobkowicz, E. Flattum, B. Gobbi, P. Tamburello, P. Mooney, Elizaveta Shabalina, B. Gómez, Z. H. Zhu, F. Borcherding, M. Merkin, C. S. Mishra, Anurag Gupta, S. Feher, B. Baldin, N. Amos, B. Gibbard, T. Rockwell, Iain Alexander Bertram, Robert Hirosky, S. Chopra, N. K. Mondal, Anna Goussiou, Shashikant Dugad, Michael Rijssenbeek, D. Edmunds, Emanuela Barberis, H. T. Diehl, H. Singh, S. Reucroft, J. T. White, E. Smith, C. Cretsinger, N.V. Mokhov, Jasvinder A. Singh, Y. Ducros, C. Yoshikawa, Alexander Leflat, Bobby Samir Acharya, H. A. Neal, J. Sculli, G. E. Forden, M. Strovink, A. Boehnlein, L. T. Goss, G. Guglielmo, R. Hernández-Montoya, H. C. Shankar, J. T. Linnemann, Andre Sznajder, T. Yasuda, M. Bhattacharjee, A. P. Heinson, B. Zhang, Gregory R Snow, Raymond Brock, Boaz Klima, A. Zieminski, Miguel Mostafa, M. D. Peters, V. N. Evdokimov, M. Sosebee, J. Ellison, N. Sotnikova, M. M. Baarmand, J. Krane, D. Norman, D.S. Koltick, Y. Pischalnikov, Ulrich Heintz, K. Yip, Sarah Catherine Eno, R. E. Hall, J. L. González Solís, Andrew White, K. A. Johns, L. Babukhadia, H. Jöstlein, Howard Gordon, R. Jesik, Sergey Kuleshov, Nikos Varelas, H. Haggerty, R. K. Shivpuri, Vasken Hagopian, K. C. Frame, Gilvan Alves, Z. Casilum, C. Murphy, O. Ramirez, S. Willis, P. Grudberg, Sharon Hagopian, H. Weerts, L. Oesch, E. W. Anderson, T. Heuring, T. Mc Kibben, A. K.A. Maciel, Victor Daniel Elvira, Neeti Parashar, Jinhong Yu, F. Nang, C. K. Jung, A. L. Lyon, Shuichi Kunori, S. Krzywdzinski, Q. Z. Li, Allan G Clark, A. N. Galyaev, Lev Dudko, Richard Breedon, John Hobbs, M. Diesburg, D. Owen, P. Bloom, J. A. Wightman, V. Vaniev, J. Tarazi, S. P. Denisov, J. Bantly, M. Fortner, A.S. Dyshkant, M. Tartaglia, P. Gartung, A. Zylberstejn, R. J. Madaras, M. H.G. Souza, J. Perkins, M. Zielinski, N. I. Bojko, Young-Sang Yu, W. Y. Chen, G. Gutierrez, S. Y. Jun, T. L.T. Thomas, K. S. Hahn, S. A. Jerger, D. Cutts, Y. Gershtein, H. Greenlee, Kaushik De, Allen Mincer, M. R. Krishnaswamy, W. E. Cooper, P. Yepes, H. E. Montgomery, J. V.D. Wirjawan, Wagner Carvalho, R. Piegaia, R. Snihur, F. Hsieh, N. Parua, V.V. Abramov, Sebastian Grinstein, A. Bross, Daniel R Claes, W. G. Cobau, M. I. Martin, Greg Landsberg, M. L. Stevenson, A. Para, George R. Kalbfleisch, R. J. Genik, Matthew Jones, J. Jaques, Y. Kulik, Serban Protopopescu, Michael A. Strauss, T. L. Geld, J. S. Hoftun, K. Davis, J. N. Butler, Heriberto Castilla-Valdez, S. N. Gurzhiev, Sergey Chekulaev, P. I. Goncharov, A. V. Kostritskiy, V. S. Narasimham, D. P. Stoker, C. Boswell, C. Miao, Ron Lipton, J. M. Guida, M. Paterno, D. Fein, P. D. Grannis, Alexander Belyaev, Sissel Hansen, H. Piekarz, Arnaud Lucotte, V. Oguri, J. Womersley, Thomas G Trippe, Suman Bala Beri, Don Lincoln, Stephen Wimpenny, I. Adam, P. Rubinov, A. Baden, Erich Varnes, Philip Baringer, Daniel John Karmgard, D. Hedin, G. C. Blazey, Viatcheslav Stolin, C. Hebert, Dhiman Chakraborty, R. Yamada, K. W. Merritt, S. Youssef, S. Choi, T. Marshall, S. Banerjee, K. M. Mauritz, H. D. Wahl, L. Coney, S. H. Ahn, Randy Ruchti, D. Karmanov, J. Warchol, V. A. Bezzubov, Jing Li, Peter Nemethy, Orin I. Dahl, F. Landry, John Rutherfoord, Darien Wood, J. F. Bartlett, V. Manankov, Winston Ko, A. A. Mayorov, A. Sanchez-Hernandez, Robert Kehoe, D. A. Stoyanova, Nicholas John Hadley, S. Fuess, P.F. Ermolov, Brajesh C Choudhary, Mary Beth Adams, J. P. Negret, S. Blessing, R. P. Smith, Andrew Brandt, R. Engelmann, M. Roco, G. Eppley, Scott Snyder, Z. Wu, Gervasio Gomez, Joan A. Guida, R. Markeloff, M. K. Fatyga, G. Steinbrück, Michael Shupe, Vladimir Gavrilov, Y. Fisyak, Gordon Watts, R. Mc Carthy, E. A. Kozlovsky, V. S. Burtovoi, Eunil Won, Rajendran Raja, M. Chung, J. Mc Kinley, V. Sirotenko, O. V. Eroshin, G. Di Loreto, H.E. Miettinen, H. da Motta, Marvin Johnson, J. G.R. Lima, J. Snow, C. Shaffer, D. Cullen-Vidal, K. Genser, Phillip Gutierrez, Brad Abbott, N. N. Biswas, A. V. Kotwal, Harrison Prosper, D. Denisov, A. V. Kozelov, A. S. Ito, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, E. G. Zverev, Pm Tuts, L. Lueking, F. Stichelbaut, Meenakshi Narain, A. Narayanan, K. Del Signore, R. W. Stephens, P. Yamin, S. Mani, R. Madden, Peter W. Draper, Pushpalatha C Bhat, K. Gounder, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, Y. M. Park, S.A. Kahn, M. Demarteau, A. Jonckheere, A. P. Vorobiev, Stephan Linn, N. Oshima, Daria Zieminska, R. D. Schamberger, K. Streets, Vipin Bhatnagar, R. Partridge, H. S. Mao, D. L. Adams, B. Pawlik, D. Casey, J. Kotcher, N. Graf, H. L. Melanson, P. Z. Quintas, J. H. Christenson, J. M. Hauptman, and Cecilia Elena Gerber

Subjects
Physics, Particle physics, Gluino, Supergravity, Physics::Medical Physics, High Energy Physics::Phenomenology, Tevatron, General Physics and Astronomy, FOS: Physical sciences, Supersymmetry, Gluon, Luminosity, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Nuclear Experiment, Energy (signal processing)
Abstract

Using data corresponding to an integrated luminosity of 79 pb-1, D0 has searched for events containing multiple jets and large missing transverse energy in pbar-p collisions at sqrt(s)=1.8 TeV at the Fermilab Tevatron collider. Observing no significant excess beyond what is expected from the standard model, we set limits on the masses of squarks and gluinos and on the model parameters m_0 and m_1/2, in the framework of the minimal low-energy supergravity models of supersymmetry. For tan(beta) = 2 and A_0 = 0, with mu < 0, we exclude all models with m_squark < 250 GeV/c^2. For models with equal squark and gluino masses, we exclude m < 260 GeV/c^2., 10 pages, 3 figures, Submitted to PRL, Fixed typo on page bottom of p. 6 (QCD multijet background is 35.4 events)

Published
2016

2. [Untitled]

Author

George R. Kalbfleisch, Kimball A. Milton, and Leonard Gamberg

Subjects
Physics, Particle physics, Unitarity, Dirac (video compression format), Tevatron, Magnetic monopole, General Physics and Astronomy, Duality (optimization), law.invention, law, Bibliography, High Energy Physics::Experiment, Fermilab, Collider
Abstract

Recently, there has been renewed interest in the search for low-mass magnetic monopoles. At the University of Oklahoma we are performing an experiment (Fermilab E882) using material from the old D0 and CDF detectors to set limits on the existence of Dirac monopoles of masses of the order of 500 GeV. To set such limits, estimates must be made of the production rate of such monopoles at the Tevatron collider, and of the binding strength of any such produced monopoles to matter. Here we sketch the still primitive theory of such interactions, and indicate why we believe a credible limit may still be obtained. On the other hand, there have been proposals that the classic Euler–Heisenberg Lagrangian together with duality could be employed to set limits on magnetic monopoles having masses less than 1 TeV, based on virtual, rather than real processes. The D0 collaboration at Fermilab has used such a proposal to set mass limits based on the nonobservation of pairs of photons each with high transverse momentum. We critique the underlying theory, by showing that the cross section violates unitarity at the quoted limits and is unstable with respect to radiative corrections. We therefore believe that no significant limit can be obtained from the current experiments, based on virtual monopole processes.

Published
2000

3. Small AngleJ/ψProduction inpp¯Collisions at√s=1.8TeV

Author

H. A. Neal, Robert Hirosky, H. C. Shankar, K. Yip, C. K. Jung, W. Y. Chen, G. Gutierrez, M. Zielinski, A. N. Galyaev, Jinhong Yu, Gilvan Alves, A.S. Dyshkant, George R. Kalbfleisch, V. S. Narasimham, Thomas G Trippe, Meenakshi Narain, Michael A. Strauss, R. Jesik, W. E. Cooper, A. A. Mayorov, Pushpalatha C Bhat, I. Adam, P. Rubinov, Andrew White, D. Stewart, S. N. Gurzhiev, M. K. Fatyga, G. Steinbrück, J. Snow, Viatcheslav Stolin, P. Bloom, J. A. Wightman, K. W. Merritt, P. Grudberg, Q. Z. Li Demarteau, A. L. Spadafora, J. F. Bartlett, V. Manankov, C. Murphy, R. Astur, T. Heuring, C. Boswell, Suman Bala Beri, A. Narayanan, D. Green, A. Baden, G. C. Blazey, R. Yamada, K. Gounder, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, R. Snihur, Emanuela Barberis, L. Lueking, H. L. Melanson, P. Z. Quintas, J. V.D. Wirjawan, Joan A. Guida, G. Di Loreto, D. Denisov, S. A. Jerger, Srinivasan Rajagopalan, Thomas Ferbel, N. I. Bojko, M. H.G. Souza, P. Yepes, H. E. Montgomery, John Hobbs, S. K. Kim, A. Leflat, M. Sosebee, H. D. Wahl, S. M. Chang, S. H. Ahn, R. K. Shivpuri, M. Chung, K. Del Signore, W. G. Cobau, M. I. Martin, J. H. Christenson, Winston Ko, D. R. Claes, M. R. Adams, Young-Sang Yu, C. Cretsinger, M. Strovink, E. James, Orin I. Dahl, F. Landry, John Rutherfoord, L. Magaña-Mendoza, J. Bantly, J. M. Hauptman, Cecilia Elena Gerber, Y. M. Park, S.A. Kahn, D. Edmunds, L. T. Goss, Philip Baringer, Hiroaki Aihara, K. M. Mauritz, J. Jaques, Andre Sznajder, M. L. Stevenson, T. Fahland, M. Tartaglia, P.F. Ermolov, V. S. Burtovoi, Andrew Brandt, R. Engelmann, Liu Chen, E. A. Kozlovsky, M. D. Peters, H.E. Miettinen, M. Bhattacharjee, Kaushik De, V. A. Bezzubov, M. Demarteau, J. P. Negret, R. P. Smith, J. Mc Kinley, J. Womersley, Z. Wu, Dhiman Chakraborty, Michael Shupe, L. Oesch, D. Karmanov, V. V. Babintsev, Jianming Qian, F. Borcherding, S. Banerjee, V. Balamurali, B. G. Pope, E. Flattum, Raymond Brock, Boaz Klima, J. S. Hoftun, K. Davis, J. N. Butler, P. D. Grannis, H. Piekarz, Vladimir Gavrilov, E. G. Zverev, F. Stichelbaut, J. L. González-Solís, P. Gartung, A. Jonckheere, Peter Nemethy, Brajesh C Choudhary, M. Roco, Richard Breedon, A. P. Vorobiev, Stephan Linn, Elizaveta Shabalina, Gordon Watts, V. Oguri, E. Oltman, V. Sirotenko, D. Norman, E. Smith, O. V. Eroshin, P. I. Goncharov, Y. Fisyak, R. Mc Carthy, G. Eppley, N. Oshima, H. da Motta, S. Willis, Miguel Mostafa, M. M. Baarmand, B. Pawlik, Sarah Catherine Eno, J. T. White, Marvin Johnson, P. Hanlet, Heriberto Castilla-Valdez, D. Buchholz, Phillip Gutierrez, Daria Zieminska, J. G.R. Lima, B. Gibbard, B. S. Acharya, A. V. Kozelov, Wagner Carvalho, C. Klopfenstein, S. Youssef, Tong Hu, F. Nang, J. Sculli, Edilamar Menezes de Oliveira, D. Casey, P. Tamburello, A. S. Ito, J. Kotcher, S. Choi, Richard B. Lipton, Sharon Hagopian, D. Vititoe, J. Warchol, A. K.A. Maciel, G. Finocchiaro, R. J. Genik, C. Miao, C. S. Mishra, Heng Xu, A. Sanchez-Hernandez, Anna Goussiou, Nikos Varelas, A. V. Kotwal, Harrison Prosper, Robert Kehoe, K. Genser, K. S. Hahn, D. Cutts, Stephen Wimpenny, T. Mc Mahon, A. R. Clark, G. Guglielmo, Gregory R Snow, Greg Landsberg, P. Yamin, D. P. Stoker, Elizabeth Gallas, R. Piegaia, R. Hernández-Montoya, H. Jostlein, T. Marshall, N. Graf, K. Streets, Vipin Bhatnagar, Vasken Hagopian, H. Weerts, Darien Wood, T. L. Geld, N. Sotnikova, J. Krane, S. Mani, Rajendran Raja, Nicholas John Hadley, S. P. Denisov, Lev Dudko, S. Blessing, Scott Snyder, Eunil Won, M. Paterno, M. R. Krishnaswamy, R. Markeloff, F. Lobkowicz, S. C. Loken, R. Partridge, M. Abolins, F. Hsieh, R. Madden, N. Parua, V.V. Abramov, S. Reucroft, B. Baldin, Matthew Jones, A. Para, Sergey Chekulaev, Brad Abbott, Y. Ducros, C. Yoshikawa, J. B. Singh, Peter W. Draper, T. Rockwell, Iain Alexander Bertram, L. Babukhadia, Arnaud Lucotte, H. S. Mao, G. Wang, Alberto Santoro, Sergey Kuleshov, H. Haggerty, T. Mc Kibben, Victor Daniel Elvira, J. Mc Donald, T. Joffe-Minor, D. L. Adams, Randy Ruchti, Michael Rijssenbeek, H. E. Fisk, V. N. Evdokimov, D.S. Koltick, J. T. Linnemann, S. R. Dugad, P. Mooney, N. K. Mondal, H. T. Diehl, H. Singh, A. Boehnlein, M. Fortner, J. Perkins, R. D. Schamberger, S. Feher, Ting Hu, A. Zieminski, J. Ellison, S. Fuess, Y. Gershtein, A. V. Kostritskiy, M. Merkin, Sissel Hansen, A. L. Lyon, Shuichi Kunori, Z. Zhou, J. Solomon, K. A. Johns, L. Coney, V. Vaniev, D. A. Stoyanova, N. Amos, Gervasio Gomez, R. J. Madaras, E. W. Anderson, S. Y. Jun, T. L.T. Thomas, Allen Mincer, Sebastian Grinstein, P. Padley, Alexey Volkov, C. Shaffer, D. Cullen-Vidal, James H Cochran, N. N. Biswas, Mitchell Wayne, H. Schellman, J. M. Kohli, Stefan Grünendahl, J. Thompson, S. Chopra, B. Gómez, Z. H. Zhu, J. M. Guida, D. Hedin, Alexander Belyaev, Y. Pischalnikov, Ulrich Heintz, P. M. Tuts, R. W. Stephens, M. Diesburg, B. May, D. Owen, B. Gobbi, Anurag Gupta, J. Tarazi, T. Yasuda, T. Huehn, D. Fein, Don Lincoln, Erich Varnes, Daniel John Karmgard, Jing Li, N.V. Mokhov, Y. H. Zhou, G. E. Forden, A. P. Heinson, B. Zhang, R. E. Hall, Z. Casilum, S. Krzywdzinski, A. Zylberstejn, H. Greenlee, A. Bross, Serban Protopopescu, M. L. Kelly, Howard Gordon, K. C. Frame, and O. Ramirez

Subjects
Physics, Particle physics, Detector, Tevatron, Theoretical models, General Physics and Astronomy, law.invention, Nuclear physics, Cross section (physics), Transverse plane, law, Pseudorapidity, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Collider
Abstract

This paper presents the first measurement of the inclusive J/Psi production cross section in the forward pseudorapidity region 2.5

Published
1999

4. Search for Squarks and Gluinos in Single-Photon Events with Jets and Large Missing Transverse Energy inpp¯Collisions at√s=1.8TeV

Author

J. M. Hauptman, E. Flattum, Cecilia Elena Gerber, R. Snihur, L. Lueking, V. V. Babintsev, B. G. Pope, Jianming Qian, Y. Pischalnikov, Ulrich Heintz, K. Del Signore, E. Smith, S. M. Chang, R. Hernández-Montoya, N. Sotnikova, J. Krane, M. Diesburg, C. S. Mishra, Tong Hu, Elizaveta Shabalina, Hiroaki Aihara, G. Eppley, D. Owen, T. Mc Mahon, J. Tarazi, P. M. Tuts, R. W. Stephens, A. V. Kostritskiy, Alexander Belyaev, H. da Motta, D. A. Stoyanova, L. Magaña-Mendoza, Sissel Hansen, J. G.R. Lima, J. Jaques, J. T. White, Meenakshi Narain, Gervasio Gomez, C. Shaffer, D. Cullen-Vidal, N. N. Biswas, G. Wang, Alberto Santoro, L. Coney, S. A. Jerger, Andrew White, Robert Hirosky, A. Leflat, S. Chopra, H. D. Wahl, H. Haggerty, A. S. Ito, Winston Ko, K. S. Hahn, G. Guglielmo, D. Cutts, J. Mc Donald, W. G. Cobau, M. I. Martin, D. Green, B. Gibbard, W. Y. Chen, G. Gutierrez, Gilvan Alves, T. Joffe-Minor, A. Narayanan, George R. Kalbfleisch, H. E. Fisk, P. Yamin, Richard Breedon, V. S. Narasimham, Dhiman Chakraborty, H. L. Melanson, P. Z. Quintas, J. Mc Kinley, J. Sculli, Raymond Brock, C. Cretsinger, Philip Baringer, Z. Zhou, J. Solomon, Vasken Hagopian, M. Strovink, E. James, P. Padley, Alexey Volkov, N.V. Mokhov, C. Murphy, R. Astur, S. Banerjee, J. Womersley, Boaz Klima, John Hobbs, James H Cochran, V. Balamurali, Nikos Varelas, M. Sosebee, P. Gartung, Y. H. Zhou, S. K. Kim, A. A. Mayorov, Mitchell Wayne, H. Schellman, J. M. Kohli, Greg Landsberg, F. Stichelbaut, V. A. Bezzubov, T. Heuring, M. K. Fatyga, G. Steinbrück, R. K. Shivpuri, M. R. Adams, Young-Sang Yu, H. Weerts, J. H. Christenson, S. Mani, D. Norman, J. Bantly, J. Snow, D. R. Claes, Stefan Grünendahl, J. Thompson, B. S. Acharya, C. K. Jung, G. E. Forden, A. P. Heinson, M. H.G. Souza, J. P. Negret, R. P. Smith, B. Gómez, V. Oguri, T. L. Geld, T. G. Trippe, S. Willis, R. Madden, M. Bhattacharjee, M. Tartaglia, B. Zhang, D. Stewart, Z. H. Zhu, M. Paterno, Lev Dudko, S. N. Gurzhiev, R. Jesik, Sharon Hagopian, Kaushik De, P. Yepes, H. E. Montgomery, Michael Shupe, Peter W. Draper, Andrew Brandt, A. K.A. Maciel, Wagner Carvalho, R. Engelmann, K. Streets, A. N. Galyaev, Vipin Bhatnagar, E. Oltman, M. L. Stevenson, E. A. Kozlovsky, R. Partridge, H.E. Miettinen, K. Genser, Pushpalatha C Bhat, F. Borcherding, Peter Nemethy, M. Roco, K. Gounder, Rajendran Raja, B. Lauer, Y. Fisyak, R. Mc Carthy, Stephen Wimpenny, W. E. Cooper, L. P. Chen, N. Parua, V.V. Abramov, D. Karmanov, E. W. Anderson, Marvin Johnson, M. A.C. Cummings, T. Marshall, R. Piegaia, Viatcheslav Stolin, K. M. Mauritz, Brad Abbott, J. Warchol, Heriberto Castilla-Valdez, Matthew Jones, H. S. Mao, R. E. Hall, D. L. Adams, J. L. González Solís, B. May, A. V. Kozelov, Miguel Mostafa, M. M. Baarmand, P.F. Ermolov, Darien Wood, A. V. Kotwal, B. Hoeneisen, Lee Sawyer, Sarah Catherine Eno, Harrison Prosper, Allen Mincer, Nicholas John Hadley, Z. Casilum, V. S. Burtovoi, Arnaud Lucotte, Sebastian Grinstein, S. Feher, B. Gobbi, E. G. Zverev, S. Blessing, Ting Hu, F. Nang, Richard B. Lipton, A. Baden, Scott Snyder, Anurag Gupta, B. Pawlik, G. C. Blazey, Brajesh C Choudhary, D. P. Stoker, A. Zieminski, D. Vititoe, R. Yamada, R. Markeloff, R. J. Genik, Randy Ruchti, D. Casey, T. Yasuda, Y. M. Park, S. H. Ahn, T. Huehn, J. Kotcher, R. J. Madaras, S.A. Kahn, H. A. Neal, H. C. Shankar, D. Buchholz, Edilamar Menezes de Oliveira, O. I. Dahl, J. V.D. Wirjawan, S. Y. Jun, T. L.T. Thomas, Michael A. Strauss, D. Fein, M. Demarteau, K. Yip, N. Graf, P. Tamburello, Heng Xu, Z. Wu, Vladimir Gavrilov, Anna Goussiou, Gordon Watts, M. Zielinski, J. M. Guida, D. Hedin, Jinhong Yu, V. Sirotenko, O. V. Eroshin, Phillip Gutierrez, Elizabeth Gallas, Gregory R Snow, H. Jostlein, A.S. Dyshkant, Joan A. Guida, P. Hanlet, F. Lobkowicz, G. Di Loreto, T. Rockwell, Iain Alexander Bertram, D. Denisov, Michael Rijssenbeek, C. Boswell, A. Jonckheere, Don Lincoln, Srinivasan Rajagopalan, Erich Varnes, Thomas Ferbel, V. N. Evdokimov, A. P. Vorobiev, D.S. Koltick, J. T. Linnemann, Stephan Linn, L. Babukhadia, M. Chung, N. Oshima, Daria Zieminska, Daniel John Karmgard, Emanuela Barberis, G. Finocchiaro, Suman Bala Beri, L. T. Goss, Jing Li, S. Krzywdzinski, D. Edmunds, A. Zylberstejn, Andre Sznajder, Yuri Gershtein, P. Bloom, H. Greenlee, J. A. Wightman, M. D. Peters, A. Bross, L. Oesch, Serban Protopopescu, N. I. Bojko, S. Reucroft, M. Fortner, J. Perkins, M. Merkin, M. Abolins, J. S. Hoftun, K. Davis, J. N. Butler, P. D. Grannis, C. Yoshikawa, H. Piekarz, R. D. Schamberger, P. Mooney, S. C. Loken, B. Baldin, Y. Ducros, J. B. Singh, N. K. Mondal, H. T. Diehl, H. Singh, Sergey Kuleshov, N. Amos, T. Mc Kibben, Victor Daniel Elvira, A. Boehnlein, S. Youssef, S. Choi, A. Sanchez-Hernandez, Robert Kehoe, J. Ellison, Eunil Won, S. Fuess, A. L. Lyon, A. L. Spadafora, Shuichi Kunori, P. I. Goncharov, K. A. Johns, V. Vaniev, C. Miao, S. R. Dugad, M. L. Kelly, Howard Gordon, K. C. Frame, O. Ramirez, S. P. Denisov, P. Grudberg, M. R. Krishnaswamy, F. Hsieh, A. R. Clark, A. Para, Sergey Chekulaev, I. Adam, P. Rubinov, K. W. Merritt, Q. Z. Li Demarteau, J. F. Bartlett, V. Manankov, F. Landry, John Rutherfoord, C. Klopfenstein, and T. Fahland

Subjects
Physics, Particle physics, Branching fraction, Physics beyond the Standard Model, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Supersymmetry, Standard Model, Nuclear physics, High Energy Physics::Experiment, Production (computer science), Energy (signal processing), Minimal Supersymmetric Standard Model
Abstract

We search for new physics using events with one high transverse energy photon, two or more jets, and an apparent imbalance in transverse energy, in p{ovr p} collisions at the Fermilab Tevatron at {radical} (s) =1.8 TeV . Such events are predicted for production of supersymmetric particles in some models. No excess is observed beyond expected background. For the parameter space of the minimal supersymmetric standard model with branching fraction B({tilde {chi}}{sup 0}{sub 2}{r_arrow}{gamma}thinsp{tilde {chi}}{sup 0}{sub 1})=1 and m{sub {tilde {chi}}{sup 0}{sub 2 }}{minus}m{sub {tilde {chi}}{sup 0}{sub 1}}{gt}20 GeV , we obtain a 95{percent} confidence level lower mass limit of 310thinspthinspGeV for equal mass squarks and gluinos. The results are also interpreted in models with low energy gauge mediated supersymmetry breaking. {copyright} {ital 1998} {ital The American Physical Society }

Published
1999

5. Search forCharge−1/3Third-Generation Leptoquarks inpp¯Collisions ats=1.8TeV

Author

C. Klopfenstein, B. May, T. Huehn, A. Jonckheere, B. Gobbi, Y. Fisyak, D. Fein, H. E. Fisk, Robert Hirosky, Jasvinder A. Singh, D. Edmunds, M. Sosebee, S. C. Loken, Erich Varnes, T. Yasuda, M. Demarteau, R. Astur, T. Heuring, Marvin Johnson, Daniel John Karmgard, H. L. Melanson, R. Hernández-Montoya, A. V. Kozelov, B. Baldin, Bobby Samir Acharya, Andre Sznajder, H. A. Neal, K. S. Hahn, T. McMahon, H. C. Shankar, S. A. Jerger, D. Lincoln, R. Snihur, M. D. Peters, M. Abolins, T. McKibben, N. Sotnikova, J. Krane, J. T. Linnemann, Stephen Wimpenny, J. Bantly, A. Leflat, H. E. Montgomery, P. Mooney, Andrew White, L. Oesch, I. Adam, P. Rubinov, Greg Landsberg, M. Narain, W. G. Cobau, T. Marshall, W. Y. Chen, Gilvan Alves, L. Magaña-Mendoza, T. Joffe-Minor, Yu. Pischalnikov, George R. Kalbfleisch, M. Merkin, J. S. Kang, V. S. Narasimham, Jing Li, P. C. Bhat, S. M. Chang, R. Engelmann, N. K. Mondal, H. T. Diehl, H. Singh, P. Padley, Alexey Volkov, K. W. Merritt, James H Cochran, T. L. Geld, J. V.D. Wirjawan, D. R. Green, Darien Wood, C. Boswell, J. McDonald, E. A. Kozlovsky, Joan A. Guida, H.E. Miettinen, M. Paterno, J. Kourlas, A. Brandt, N. Amos, H. D. Wahl, Mitchell Wayne, R. J. Madras, H. Schellman, J. M. Kohli, V. Manankov, A. A. Mayorov, U. Heintz, A. Bross, Raymond Brock, Nicholas John Hadley, Boaz Klima, C. Yoshikawa, A. Baden, Z. Zhou, J. Solomon, J. Ellison, S. Youssef, S. Choi, G. Di Loreto, Suman Bala Beri, C. Cretsinger, H. Castilla-Valdez, Yanwen Liu, M. K. Fatyga, Emanuela Barberis, G. C. Blazey, J. Thompson, Vasken Hagopian, John Hobbs, J. Z.Y. Jiang, J. Snow, M. Chung, K. Gounder, N. Mokhov, S. Blessing, Scott Snyder, M. R. Adams, Elizabeth Gallas, L. T. Goss, A. Sanchez-Hernandez, R. Markeloff, M. Strovink, E. James, M. D. Jones, M. Strauss, D. Norman, B. Gómez, Z. H. Zhu, G. E. Forden, A. P. Heinson, S. Banerjee, H. Weerts, W. Smart, V. Balamurali, R. E. Hall, J. L. González Solís, Z. Casilum, Lev Dudko, Shashikant Dugad, Brad Abbott, Robert Kehoe, A. Gupta, Peter Nemethy, A. L. Spadafora, S. Proptopopescu, P. I. Goncharov, C. S. Mishra, S. Willis, A. Para, E. G. Zverev, A. N. Galyaev, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, Dhiman Chakraborty, M. Bhattacharjee, M. Tartaglia, H. Greenlee, A. S. Ito, S. Glenn, Srinivasan Rajagopalan, Thomas Ferbel, J. Yu, J. McKinley, R. Jesik, F. Landry, John Rutherfoord, K. A. Johns, Q. Z. Li-Demarteau, L. Babukhadia, D. Buchholz, D. Cutts, Edilamar Menezes de Oliveira, N. Parua, K. Del Signore, Wagner Carvalho, P. Z. Quintas, Alexander Vorobiev, Young-Sang Yu, Eunil Won, Haifeng Li, T. G. Trippe, C. T. Murphy, A. V. Kostritskiy, D. Stewart, S. N. Gurzhiev, S. Hansen, F. Stichelbaut, J. Jaques, Ting Hu, Hiroaki Aihara, S. Lökös, V. Oguri, A. Zylberstejn, G. Eppley, Ron Lipton, B. Gibbard, Sharon Hagopian, J. Sculli, A. K.A. Maciel, L. P. Chen, Daniel R Claes, P. Tamburello, L. Coney, D. Vititoe, M. L. Stevenson, A. Zieminski, Y. Ducros, P. M. Tuts, R. J. Genik, C. K. Jung, H. da Motta, J. G.R. Lima, R. W. Stephens, S. Feher, S. Fuess, M. L. Kelly, J. Yang, W. E. Cooper, E. Oltman, E. Flattum, S. Krzywdzinski, J. Womersley, J. Warchol, A. Narayanan, Howard Gordon, P. Hanlet, Y. M. Park, K. C. Frame, F. Borcherding, D. Denisov, J. M. Hauptman, Cecilia Elena Gerber, J. F. Bartlett, Heng Xu, Anna Goussiou, O. Ramirez, P. Gartung, Viatcheslav Stolin, Nikos Varelas, R. K. Shivpuri, J. Balderston, S.A. Kahn, G. Finocchiaro, S. Y. Jun, B. G. Pope, Alexander Belyaev, Y. Gershtein, T. L.T. Thomas, G. Guglielmo, Sergey Kuleshov, R. Piegaia, J. H. Christenson, M. Fortner, A. Boehnlein, J. Perkins, S. P. Denisov, P. Grudberg, Randy Ruchti, D. Karmanov, E. W. Anderson, L. Lueking, Victor Daniel Elvira, M. M. Baarmand, Sarah Catherine Eno, M. R. Krishnaswamy, Kaushik De, Jianming Qian, F. Hsieh, P. Bloom, J. A. Wightman, R. McCarthy, F. Nang, N. I. Bojko, A. R. Clark, C. L. Kim, D. P. Stoker, Elizaveta Shabalina, Brajesh C Choudhary, Gregory R Snow, Allen Mincer, Sebastian Grinstein, Sergey Chekulaev, H. Haggerty, Vladimir Gavrilov, S. Reucroft, Gordon Watts, J. S. Hoftun, K. Davis, J. N. Butler, P. D. Grannis, Tong Hu, H. Piekarz, S.H. Ahn, G. Gutierrez, M. Diesburg, V. Sirotenko, S. Grünendahl, K. Genser, O. V. Eroshin, H. S. Mao, Phillip Gutierrez, G. Wang, Alberto Santoro, Seong Keun Kim, M. H.G. Souza, P. Yepes, A. L. Lyon, Shuichi Kunori, D. Owen, K. M. Mauritz, P.F. Ermolov, V. S. Burtovoi, J. T. White, J. Tarazi, D. A. Stoyanova, Gervasio Gomez, C. Shaffer, D. Cullen-Vidal, A. Goldschmidt, N. N. Biswas, R. Raja, Stephan Linn, S. Chopra, N. Oshima, Daria Zieminska, R. D. Schamberger, J. M. Guida, D. Hedin, F. Lobkowicz, T. Rockwell, Iain Alexander Bertram, Michael Rijssenbeek, V. N. Evdokimov, D.S. Koltick, V. A. Bezzubov, J. P. Negret, H. Jöstlein, R. P. Smith, Michael Shupe, P. Yamin, K. Streets, Vipin Bhatnagar, R. Partridge, A. V. Kotwal, Harrison Prosper, D. L. Adams, S. Mani, R. Madden, L. Rasmussen, B. Pawlik, Peter W. Draper, Georg Steinbrück, T. Fahland, D. Casey, R. Yamada, J. Kotcher, E. Smith, M. Roco, O. I. Dahl, N. Graf, and M. I. Martin

Subjects
Physics, Particle physics, Pair production, Branching fraction, Tau neutrino, High Energy Physics::Phenomenology, General Physics and Astronomy, High Energy Physics::Experiment, Leptoquark, Charge (physics), Elementary particle, Coupling (probability), Lepton
Abstract

We report on a search for $\mathrm{charge}\ensuremath{-}1/3$ third-generation leptoquarks (LQ) produced in $p\overline{p}$ collisions at $\ensuremath{\surd}s\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ using the $\mathrm{D}0$ detector at Fermilab. Third-generation leptoquarks are assumed to be produced in pairs and to decay to a tau neutrino and a $b$ quark with branching fraction $B$. We place upper limits on $\ensuremath{\sigma}(p\overline{p}\ensuremath{\rightarrow}\mathrm{LQ}\overline{\mathrm{LQ}}){B}^{2}$ as a function of the leptoquark mass ${M}_{\mathrm{LQ}}$. Assuming $B\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$, we exclude at the 95% confidence level third-generation scalar leptoquarks with ${M}_{\mathrm{LQ}}l94\mathrm{GeV}{/c}^{2}$, and third-generation vector leptoquarks with ${M}_{\mathrm{LQ}}l216\mathrm{GeV}{/c}^{2}({M}_{\mathrm{LQ}}l148\mathrm{GeV}{/c}^{2}$) assuming Yang-Mills (anomalous) coupling.

Published
1998

6. A Measurement of theWBoson Mass at the Fermilabpp¯Collider

Author

D. Cutts, G. Eppley, P. Padley, Alexey Volkov, Greg Landsberg, James H Cochran, J. G.R. Lima, N. Parua, Matthew Jones, Mitchell Wayne, A. S. Ito, H. Schellman, J. M. Kohli, Pm Tuts, C. Cretsinger, T. L. Geld, Natalie A. Roe, M. Strovink, D. Stewart, D. Buchholz, Edilamar Menezes de Oliveira, Stefan Grünendahl, E. James, R. L. McCarthy, R. K. Shivpuri, M. Tartaglia, Q. Z. Li-Demarteau, Peter Nemethy, M. Roco, J. Thompson, S. A. Jerger, T. Joffe-Minor, A. Leflat, Robert Hirosky, B. Gómez, Z. H. Zhu, M. Paterno, S. N. Gurzhiev, P. Tamburello, Heng Xu, Anna Goussiou, Kaushik De, Shashikant Dugad, Randy Ruchti, W. Y. Chen, W. G. Cobau, M. I. Martin, J. S. Kang, Gilvan Alves, J. McDonald, George R. Kalbfleisch, H. E. Fisk, A. Baden, G. C. Blazey, C. S. Mishra, V. S. Narasimham, G. Guglielmo, J. M. Guida, D. Hedin, A. A. Mayorov, J. Jaques, S. Glenn, J. McKinley, M. K. Fatyga, G. Steinbrück, Gregory R Snow, Vasken Hagopian, H. Weerts, Lev Dudko, D. A. Stoianova, Wagner Carvalho, S. Banerjee, J. Snow, S. H. Ahn, K. M. Mauritz, V. A. Bezzubov, E. W. Anderson, J. P. Negret, J. Solomon, P. Yamin, R. P. Smith, K. Streets, Vipin Bhatnagar, S. Fuess, F. Landry, John Rutherfoord, A. N. Galyaev, V. Balamurali, D. P. Stoker, T. McKibben, H. Aihara, S. Lami, P.F. Ermolov, B. Gibbard, E. G. Zverev, Michael Shupe, R. Partridge, Ron Lipton, Andrew White, T. McMahon, Y. E. Gutnikov, S. Mani, Mary Beth Adams, D. Vititoe, J. Womersley, Alexander Vorobiev, R. Jesik, R. J. Genik, J. Sculli, Allen Mincer, Michael A. Strauss, A. L. Spadafora, V. S. Burtovoi, Haifeng Li, R. Madden, C. Murphy, P. I. Goncharov, J. Kourlas, Sebastian Grinstein, John Hobbs, A. V. Kotwal, Harrison Prosper, Gordon Watts, C. L. Kim, V. Sirotenko, L. Rasmussen, R. Astur, Nikos Varelas, F. Borcherding, O. V. Eroshin, M. Bhattacharjee, C. Boswell, Peter W. Draper, Meenakshi Narain, A. V. Kostritskiy, Pushpalatha C Bhat, Joan A. Guida, W. E. Cooper, L. P. Chen, Daniel R Claes, I. Adam, P. Rubinov, Young-Sang Yu, Stephen Wimpenny, Phillip Gutierrez, Nikolai Mokhov, T. Heuring, R. J. Madaras, K. Gounder, J. M. Hauptman, Cecilia Elena Gerber, H. Da-Motta, T. G. Trippe, Sissel Hansen, L. Coney, Suman Bala Beri, T. Fahland, T. Marshall, B. Lauer, M. A.C. Cummings, G. P. Grim, R. W. Stephens, A. Narayanan, B. G. Pope, Darien Wood, D. Karmanov, K. W. Merritt, J. F. Bartlett, E. Flattum, Nicholas John Hadley, Marvin Johnson, M. M. Baarmand, Sarah Catherine Eno, S. Blessing, B. Hoeneisen, Lee Sawyer, Scott Snyder, H. S. Mao, D. Denisov, Jianming Qian, E. Smith, A. V. Kozelov, Sharon Hagopian, D. Edmunds, R. Markeloff, A. K.A. Maciel, V. Manankov, Elizaveta Shabalina, L. Magaña-Mendoza, M. Sosebee, Heriberto Castilla-Valdez, F. Lobkowicz, Srinivasan Rajagopalan, M. Merkin, J. T. White, Andre Sznajder, Dan Green, T. Rockwell, Iain Alexander Bertram, D. L. Adams, C. K. Jung, M. D. Peters, Yanwen Liu, E. Oltman, J. Bantly, L. Lueking, Brajesh C Choudhary, Vyacheslav Klyukhin, Michael Rijssenbeek, F. Nang, Raymond Brock, Boaz Klima, L. Oesch, B. May, Tong Hu, R. Piegaia, K. Bazizi, D. Norman, R. Snihur, Y. M. Park, M. Chung, S.A. Kahn, S. Willis, V. N. Evdokimov, Andrew Brandt, R. Engelmann, S. M. Chang, H.E. Miettinen, B. Gobbi, B. Pawlik, Bobby Samir Acharya, H. A. Neal, H. C. Shankar, D.S. Koltick, Anurag Gupta, Jinhong Yu, A. Klatchko, K. Del-Signore, T. Yasuda, J. Linnenmann, M. Demarteau, Dhiman Chakraborty, J. Kotcher, M. Abolins, O. I. Dahl, N. Graf, N. K. Mondal, H. T. Diehl, H. Singh, G. Wang, Alberto Santoro, Seong Keun Kim, A. Boehnlein, P. M. Sood, H. L. Melanson, P. Z. Quintas, A. Jonckheere, Stephan Linn, J. Ellison, Y. Fisyak, J. H. Christenson, N. Oshima, Daria Zieminska, R. D. Schamberger, M. L. Kelly, Howard Gordon, K. C. Frame, O. Ramirez, G. Diloreto, S. P. Denisov, P. Grudberg, M. R. Krishnaswamy, F. Hsieh, A. R. Clark, A. Para, Sergey Chekulaev, T. Huehn, D. Fein, Erich Varnes, Daniel John Karmgard, N. Grossman, Y. Pischalnikov, Ulrich Heintz, F. Stichelbaut, H. Jöstlein, M. Diesburg, D. Owen, V. Oguri, Jing Li, J. Tarazi, S. Krzywdzinski, A. L. Lyon, Shuichi Kunori, V. I. Kochetkov, Alexander Belyaev, M. L. Stevenson, S. Feher, Ting Hu, P. Hanlet, A. Zylberstejn, Gervasio Gomez, J. Warchol, A. Zieminski, G. Finocchiaro, C. Shaffer, D. Cullen-Vidal, K. Genser, A. Goldschmidt, H. Greenlee, H. D. Wahl, N. N. Biswas, R. Yamanda, P. Mooney, S. Chopra, S. Reucroft, T. Ferbel, C. Yoshikawa, A. Bross, M. H.G. Souza, Serban Protopopescu, P. Yepes, H. E. Montgomery, S. Y. Jun, J. V.D. Wirjawan, T. L.T. Thomas, P. Gartung, Emanuela Barberis, D. Casey, G. E. Forden, A. P. Heinson, J. Z.Y. Jiang, Elizabeth Gallas, L. T. Goss, R. E. Hall, J. L. González Solís, C. Klopfenstein, Z. Casilum, W. Smart, K. A. Johns, R. Hernández-Montoya, N. Sotnikova, E. A. Kozlovski, J. Krane, Rajendran Raja, H. Haggerty, S. Lökös, Brad Abbott, J. Yang, V. M. Podstavkov, P. Bloom, J. A. Wightman, M. Fortner, N. I. Bojko, J. Perkins, S. C. Loken, N. Amos, J. S. Hoftun, K. Davis, J. N. Butler, P. D. Grannis, H. Piekarz, B. Baldin, Y. Ducros, J. B. Singh, Victor Daniel Elvira, S. Youssef, S. Choi, A. Sanchez-Hernandez, Robert Kehoe, J. Balderston, R. L. Lander, D. Lincoln, Eunil Won, and K. S. Hahn

Subjects
Physics, Particle physics, Luminosity (scattering theory), High Energy Physics::Phenomenology, Detector, Tevatron, General Physics and Astronomy, law.invention, Nuclear physics, law, Transverse mass, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Collider, Boson
Abstract

We report a measurement of the W boson mass based on an integrated luminosity of 82 pb −1 from pp collisions at √s = 1.8 TeV recorded in 1994-1995 by the D0 detector at the Fermilab Tevatron. We identify W bosons by their decays to e∨ V and extract the mass by fitting the transverse mass spectrum from 28 323 W boson candidates. A sample of 3563 dielectron events, mostly due to Z→ee decays, constrains models of W boson production and the detector. We measure M W = 80.44±0.10(stat)±0.07(syst) GeV. By combining this measurement with our result form the 1992-1993 data set, we obtain M W = 80.43±0.11 GeV.

Published
1998

7. Zγproduction inpp¯collisions ats=1.8TeVand limits on anomalousZZγandZγγcouplings

Author

G. Eppley, A. Jonckheere, P. Padley, Alexey Volkov, A. P. Vorobiev, Stephan Linn, S. P. Denisov, Ulrich Heintz, J. Jaques, H. da Motta, J. G.R. Lima, Y. Fisyak, S. Krzywdzinski, R. Lander, R. D. Schamberger, S. C. Loken, M. R. Krishnaswamy, Mitchell Wayne, H. Schellman, J. M. Kohli, N. Oshima, V. I. Kochetkov, A. S. Ito, M. Diesburg, F. Hsieh, A. R. Clark, Daria Zieminska, Marvin Johnson, L. Magaña-Mendoza, D. Owen, A. Para, Stefan Grünendahl, Sergey Chekulaev, A. L. Lyon, J. Thompson, A. Zylberstejn, Jan M. Guida, A. V. Kozelov, J. Womersley, J. Tarazi, P. Bloom, I. Adam, K. W. Merritt, B. Gómez, Z. H. Zhu, Gordon Watts, V. Sirotenko, H. Greenlee, T. Heuring, J. F. Bartlett, S. Glenn, J. McKinley, N. I. Bojko, Robert Kehoe, Yanwen Liu, Robert Snihur, S. R. Dugad, D. A. Stoianova, O. V. Eroshin, R. Markeloff, Elizabeth Gallas, H. Jostlein, M. L. Kelly, Howard Gordon, K. C. Frame, Joan A. Guida, O. Ramirez, Phillip Gutierrez, Wagner Carvalho, Raymond Brock, Boaz Klima, Gervasio Gomez, J. Cochran, E. G. Zverev, S. M. Chang, K. Gounder, N. Sotnikova, T. Huehn, S. Feher, Ting Hu, D. Fein, Andrew White, Cecilia Elena Gerber, D. Chakraborty, D. Norman, D. Vititoe, Sándor Lökös, J. Yang, G. Di Loreto, R. J. Genik, S. Willis, M. A. Shupe, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, C. Shaffer, D. Cullen-Vidal, C. S. Mishra, Yu. Pischalnikov, A. Goldschmidt, M. H.G. Souza, Don Lincoln, Erich Varnes, H. E. Montgomery, A. Klatchko, A. Zieminski, M. Pang, C. Cretsinger, Daniel John Karmgard, Jianming Qian, N. N. Biswas, D. Denisov, V. M. Podstavkov, C. Boswell, L. Lueking, Srinivasan Rajagopalan, A. V. Kostritskiy, J. S. Hoftun, K. Davis, J. N. Butler, P. D. Grannis, Sissel Hansen, S. Chopra, M. Chung, H. Piekarz, Vasken Hagopian, M. Strovink, E. James, Thomas Ferbel, H. Weerts, M. Fortner, P. Grudberg, Y. E. Gutnikov, J. Kourlas, Y. M. Park, Tong Hu, R. Jesik, J. Perkins, Suman Bala Beri, C. Klopfenstein, B. G. Pope, R. Hernández-Montoya, H. L. Melanson, P. Z. Quintas, M. Strauss, Peter Nemethy, K. Del Signore, Lev Dudko, H. Lan, John Hobbs, Stephen Wimpenny, C. T. Murphy, A. N. Galyaev, N. Grossman, D. Stewart, K. Bazizi, K. M. Mauritz, P.F. Ermolov, Sebastien Jonathan Kahn, S. N. Gurzhiev, J. M. Hauptman, S. Y. Jun, S. K. Kim, N.V. Mokhov, T. L.T. Thomas, J. H. Christenson, Hiroaki Aihara, M. Bhattacharjee, M. R. Adams, B. May, Young-Sang Yu, M. Abolins, N. A. Roe, Emanuela Barberis, J. Z.Y. Jiang, D. Edmunds, W. E. Cooper, M. Demarteau, Alexander Belyaev, B. Baldin, A. P. Heinson, Y. Ducros, J. B. Singh, P. Gartung, Andre Sznajder, P. M. Tuts, G. P. Grim, M.K. Fatyga, E. Amidi, G. Guglielmo, P. Hanlet, V. S. Burtovoi, T. Marshall, J. V.D. Wirjawan, Matthew Jones, David H. Adams, P. Yamin, R. E. Hall, S. A. Jerger, L. T. Goss, Robert Hirosky, G. Wang, Alberto Santoro, K. S. Hahn, B. S. Acharya, M. D. Peters, T. Fahland, W. M. Smart, J. L. González Solís, Z. Casilum, C. L. Kim, L. Oesch, T. G. Trippe, H. Haggerty, E. W. Anderson, P. Mooney, B. Gobbi, S. Mani, Elizaveta Shabalina, H. A. Neal, H. C. Shankar, M. Goforth, E. A. Kozlovski, W. Y. Chen, Darien Wood, Gilvan Alves, P. Rubinov, T. Joffe-Minor, G. Finocchiaro, Jong-Sung Yu, Victor Daniel Elvira, Marc M Baarmand, Sharon Hagopian, H. E. Fisk, H. D. Wahl, R. Astur, Nicholas John Hadley, Heriberto Castilla-Valdez, Allen Mincer, R. J. Madaras, A. Gupta, D. Cutts, R. Madden, George R. Kalbfleisch, V. S. Narasimham, Q. Z. Li-Demarteau, S. Blessing, G.E. Forden, R. W. Stephens, E. Flattum, J. Solomon, L. Rasmussen, A. K.A. Maciel, Peter W. Draper, S. Youssef, S. Choi, B. C. Choudhary, N. K. Mondal, V. Oguri, Sebastian Grinstein, Scott Snyder, Jing Li, H. T. Diehl, A. A. Mayorov, N. Parua, Randy Ruchti, D. Buchholz, A. D. Bross, S. Reucroft, M. K. Fatyga, T.R. McMahon, M. Paterno, M. L. Stevenson, Robert J. McCarthy, A. Sanchez-Hernandez, J. Snow, S. Protopopescu, D. P. Stoker, T. Yasuda, B. Pawlik, J. Warchol, P. Yepes, R. Piegaia, P. Tamburello, N. Amos, K. Genser, C. Yoshikawa, Heng Xu, Anna Goussiou, A. V. Kotwal, H. Singh, D.R. Green, J. Balderston, J. Krane, A. Boehnlein, Greg Landsberg, B. Gibbard, Rajendran Raja, D. Casey, Meenakshi Narain, J. A. Wightman, J. Kotcher, C. K. Jung, T. McKibben, Gregory R Snow, J. Sculli, Eunil Won, Brad Abbott, S. Lami, N. Graf, Nikos Varelas, R. K. Shivpuri, K. Streets, Vipin Bhatnagar, T. L. Geld, P. M. Sood, Shuichi Kunori, D. R. Claes, K. A. Johns, M. Tartaglia, Kaushik De, J. Ellison, S. Fuess, H. S. Mao, A. Narayanan, A. Baden, G. C. Blazey, W. G. Cobau, M. Sosebee, R. Yamada, S. H. Ahn, Hui Li, Orin I. Dahl, F. Landry, John Rutherfoord, J. Bantly, R. Partridge, James C. Green, F. Borcherding, E. Oltman, Sarah Catherine Eno, Andrew Brandt, R. Engelmann, Liu Chen, Vyacheslav Klyukhin, H.E. Miettinen, F. Nang, Richard B. Lipton, A. L. Spadafora, P. I. Goncharov, A. Leflat, M. I. Martin, F. Stichelbaut, J. S. Kang, J. McDonald, S. Banerjee, V. Balamurali, M. Merkin, D. Hedin, P. C. Bhat, F. Lobkowicz, T. Rockwell, Iain Alexander Bertram, Michael Rijssenbeek, V. N. Evdokimov, D.S. Koltick, J. T. Linnemann, V. A. Bezzubov, J. P. Negret, R. P. Smith, Harrison Prosper, and J. T. White

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics
Published
1998

8. Search for First Generation Scalar Leptoquark Pairs inpp¯Collisions ats=1.8TeV

Author

W. Y. Chen, Gilvan Alves, J. T. White, George R. Kalbfleisch, V. S. Narasimham, A. A. Mayorov, W. G. Cobau, C. T. Murphy, W. M. Smart, J. Snow, P. Hanlet, M. Sosebee, B. Gibbard, Hui Li, T. G. Trippe, A. Klatchko, P. Bloom, J. Bantly, D. Hedin, M. Chung, K. Streets, Vipin Bhatnagar, J. Sculli, H. S. Mao, B. May, Sharon Hagopian, A. K.A. Maciel, J. V.D. Wirjawan, N. I. Bojko, L. Lueking, Nikos Varelas, S. Reucroft, C. Yoshikawa, G. Eppley, Ulrich Heintz, Andrew Brandt, S. P. Denisov, R. Engelmann, P. C. Bhat, Liu Chen, F. Lobkowicz, K. Del Signore, M. A. Shupe, R. K. Shivpuri, G. Guglielmo, G. Finocchiaro, B. Gobbi, R. Piegaia, M. Diesburg, L. Magaña-Mendoza, H. da Motta, J. G.R. Lima, M. R. Krishnaswamy, T. Rockwell, Iain Alexander Bertram, M. Abolins, Marc M Baarmand, Michael Rijssenbeek, D. R. Claes, Hiroaki Aihara, H.E. Miettinen, D. Owen, H. D. Wahl, Georg Steinbrueck, P. Yepes, N. Amos, K. Genser, P. M. Tuts, G. P. Grim, F. Hsieh, J. S. Hoftun, K. Davis, J. N. Butler, M. Tartaglia, P. Mooney, J. Tarazi, D. Stewart, V. Oguri, P. D. Grannis, H. Piekarz, A. R. Clark, Sebastien Jonathan Kahn, A. S. Ito, G.E. Forden, A. Para, V. N. Evdokimov, S. N. Gurzhiev, E. W. Anderson, Rajendran Raja, Kaushik De, D.S. Koltick, T. Huehn, J. T. Linnemann, D. Fein, D. Chakraborty, N. K. Mondal, H. T. Diehl, J. M. Hauptman, Sergey Chekulaev, H. A. Neal, H. C. Shankar, Gervasio Gomez, M. Goforth, H. Singh, T.R. McMahon, M. Paterno, M. L. Stevenson, S. M. Chang, Raymond Brock, Boaz Klima, V. A. Bezzubov, J. P. Negret, J. Krane, J. Warchol, S. Youssef, S. Choi, R. P. Smith, Brad Abbott, T. Yasuda, Shuichi Kunori, K. A. Johns, A. Boehnlein, A. D. Bross, Robert J. McCarthy, C. S. Mishra, P. M. Sood, I. Adam, D. Norman, A. Sanchez-Hernandez, J. Ellison, Don Lincoln, Erich Varnes, Daniel John Karmgard, Elizabeth Gallas, C. Shaffer, D. Cullen-Vidal, A. Goldschmidt, H. Jostlein, S. Fuess, S. Feher, D.R. Green, J. Balderston, Allen Mincer, N. N. Biswas, J. Jaques, Sebastian Grinstein, S. Willis, R. Partridge, R. W. Stephens, Stephen Wimpenny, C. Klopfenstein, K. W. Merritt, J. F. Bartlett, V. Manankov, Robert Kehoe, Harrison Prosper, Ting Hu, S. Chopra, Meenakshi Narain, D. P. Stoker, A. N. Galyaev, Heriberto Castilla-Valdez, B. Knuteson, J. Womersley, T. Marshall, A. V. Kostritskiy, Yanwen Liu, Darien Wood, Eunil Won, R. Hernández-Montoya, A. Zieminski, Sissel Hansen, R. Jesik, D. Karmanov, Nicholas John Hadley, E. G. Zverev, Brajesh C Choudhary, S. Blessing, Joan A. Guida, Robert Snihur, Yu. Pischalnikov, W. E. Cooper, A. Narayanan, Scott Snyder, B. Baldin, N. Sotnikova, L. Coney, Y. Ducros, J. B. Singh, Vasken Hagopian, H. Weerts, M. Demarteau, Jing Li, R. Markeloff, Alexander Belyaev, M. L. Kelly, G. Di Loreto, P. Gartung, M. Merkin, D. Denisov, M.K. Fatyga, K. Bazizi, S. Y. Jun, T. L.T. Thomas, T. Fahland, Jong-Sung Yu, Srinivasan Rajagopalan, B. S. Acharya, Lev Dudko, Thomas Ferbel, M. Strauss, N.V. Mokhov, Victor Daniel Elvira, C. L. Kim, S. A. Jerger, A. L. Spadafora, P. Padley, Alexey Volkov, Y. Fisyak, P. I. Goncharov, James H Cochran, R. Lander, Peter Nemethy, Mitchell Wayne, H. Schellman, J. M. Kohli, Marvin Johnson, A. P. Heinson, A. L. Lyon, S. R. Dugad, Stefan Grünendahl, A. V. Kozelov, J. Thompson, B. Gómez, Z. H. Zhu, R. E. Hall, J. L. González Solís, Howard Gordon, K. C. Frame, O. Ramirez, C. Cretsinger, M. Strovink, E. James, Z. Casilum, S. Krzywdzinski, M. Bhattacharjee, V. I. Kochetkov, Gordon Watts, A. Zylberstejn, Jan M. Guida, H. Greenlee, V. Sirotenko, O. V. Eroshin, Phillip Gutierrez, D. Buchholz, Matthew Jones, A. Gupta, Q. Z. Li-Demarteau, P. Tamburello, N. Parua, Randy Ruchti, Heng Xu, T. Heuring, Anna Goussiou, A. V. Kotwal, Andrew White, J. A. Wightman, P. Grudberg, Gregory R Snow, Y. E. Gutnikov, J. Kourlas, S. Glenn, J. McKinley, D. A. Stoianova, Wagner Carvalho, John Hobbs, M. R. Adams, Young-Sang Yu, N. A. Roe, M. H.G. Souza, E. Flattum, H. E. Montgomery, D. Vititoe, R. J. Genik, E. Smith, K. M. Mauritz, D. Edmunds, P.F. Ermolov, Andre Sznajder, Sándor Lökös, J. Yang, V. S. Burtovoi, M. D. Peters, R. Astur, L. Oesch, V. M. Podstavkov, R. J. Madaras, M. Fortner, C. Boswell, A. Baden, J. Perkins, Suman Bala Beri, G. C. Blazey, R. Yamada, N. Grossman, S. H. Ahn, Emanuela Barberis, J. Z.Y. Jiang, L. T. Goss, Orin I. Dahl, F. Landry, John Rutherfoord, E. A. Kozlovski, R. D. Schamberger, S. C. Loken, F. Borcherding, E. Oltman, Sarah Catherine Eno, Vyacheslav Klyukhin, F. Nang, Richard B. Lipton, K. S. Hahn, D. Cutts, S. Protopopescu, Greg Landsberg, S. Lami, T. L. Geld, G. Wang, Alberto Santoro, H. Haggerty, P. Rubinov, Cecilia Elena Gerber, Jianming Qian, Tong Hu, T. Joffe-Minor, H. E. Fisk, J. Solomon, K. Gounder, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, Y. M. Park, A. Jonckheere, Stephan Linn, N. Oshima, Daria Zieminska, P. Yamin, S. Mani, R. Madden, L. Rasmussen, Peter W. Draper, H. L. Melanson, P. Z. Quintas, S. K. Kim, J. H. Christenson, David H. Adams, B. Pawlik, D. Casey, J. Kotcher, N. Graf, C. K. Jung, T. McKibben, Alexander Vorobiev, B. G. Pope, Elizaveta Shabalina, A. Leflat, M. I. Martin, F. Stichelbaut, J. S. Kang, J. McDonald, S. Banerjee, V. Balamurali, and Robert Hirosky

Subjects
Physics, Particle physics, Branching fraction, Scalar (mathematics), Tevatron, General Physics and Astronomy, law.invention, Nuclear physics, Pair production, law, High Energy Physics::Experiment, Leptoquark, Fermilab, Collider, Lepton
Abstract

We have searched for first generation scalar leptoquark (LQ) pairs in the enu+jets channel using ppbar collider data (integrated luminosity= 115 pb^-1) collected by the DZero experiment at the Fermilab Tevatron during 1992-96. The analysis yields no candidate events. We combine the results with those from the ee+jets and nunu+jets channels to obtain 95% confidence level (CL) upper limits on the LQ pair production cross section as a function of mass and of beta, the branching fraction to a charged lepton. Comparing with the next-to-leading order theory, we set 95% CL lower limits on the LQ mass of 225, 204, and 79 GeV/c^2 for beta=1, 1/2, and 0, respectively.

Published
1998

9. Search for Scalar Leptoquark Pairs Decaying to Electrons and Jets inp¯pCollisions

Author

B. G. Pope, Stephen Wimpenny, Joan A. Guida, V. A. Bezzubov, J. P. Negret, R. P. Smith, J. Cochran, J. Li, Matthew Jones, Elizaveta Shabalina, T. Marshall, Q. Z. Li-Demarteau, Gordon Watts, V. Sirotenko, N. Parua, Randy Ruchti, G. Di Loreto, Darien Wood, M. Bhattacharjee, H. A. Neal, H. C. Shankar, O. V. Eroshin, Phillip Gutierrez, G. Eppley, H. da Motta, J. G.R. Lima, S. Youssef, S. Choi, A. V. Kotwal, Harrison Prosper, Nicholas John Hadley, S. Blessing, Scott Snyder, D. Denisov, Srinivasan Rajagopalan, Thomas Ferbel, Robert J. McCarthy, A. Sanchez-Hernandez, C. S. Mishra, G. Guglielmo, S. M. Chang, P. Padley, Alexey Volkov, M. Sosebee, M. Goforth, C. K. Jung, T. McKibben, R. Markeloff, A. N. Galyaev, A. S. Ito, Vasken Hagopian, H. Weerts, Mitchell Wayne, H. Schellman, J. M. Kohli, Robert Hirosky, D.R. Green, J. Balderston, Lev Dudko, P. C. Bhat, F. Lobkowicz, T. Rockwell, Iain Alexander Bertram, C. Klopfenstein, Alexander Vorobiev, R. K. Shivpuri, Stefan Grünendahl, J. Thompson, D. R. Claes, B. Gómez, D. Stewart, Gervasio Gomez, W. Y. Chen, Gilvan Alves, P. Yamin, Hui Li, Michael Rijssenbeek, Sebastien Jonathan Kahn, S. N. Gurzhiev, M. Tartaglia, Eunil Won, J. M. Guida, Z. H. Zhu, George R. Kalbfleisch, M. Abolins, Shuichi Kunori, S. Mani, J. M. Hauptman, J. Bantly, Kaushik De, V. S. Narasimham, K. A. Johns, N. Grossman, W. E. Cooper, V. N. Evdokimov, J. Warchol, B. Baldin, A. Klatchko, A. V. Kostritskiy, A. A. Mayorov, D.S. Koltick, P. Mooney, J. T. Linnemann, W. M. Smart, T. Huehn, R. Madden, M. K. Fatyga, C. Shaffer, D. Cullen-Vidal, A. Goldschmidt, J. Snow, Sissel Hansen, L. Rasmussen, N. N. Biswas, Peter W. Draper, T. G. Trippe, Y. Fisyak, R. Lander, J. T. White, R. Engelmann, Liu Chen, N. K. Mondal, Y. Ducros, J. B. Singh, B. May, S. Chopra, C. T. Murphy, Sharon Hagopian, A. K.A. Maciel, K. Gounder, J. Featherly, J. Jaques, A. Leflat, L. Lueking, H.E. Miettinen, K. Bazizi, H. T. Diehl, Jong-Sung Yu, Marvin Johnson, B. Gibbard, M. Nicola, Yu. Pischalnikov, B. Lauer, M. A.C. Cummings, B. Hoeneisen, W. G. Cobau, M. I. Martin, F. Stichelbaut, Lee Sawyer, Sun Kee Kim, H. L. Melanson, P. Z. Quintas, K. Del Signore, H. Singh, L. Magaña-Mendoza, P. Hanlet, I. Adam, J. Sculli, B. Gobbi, J. Krane, J. Womersley, E. W. Anderson, Alexander Belyaev, D. Fein, Nikos Varelas, A. L. Lyon, Anurag Gupta, Victor Daniel Elvira, J. Z.Y. Jiang, F. Borcherding, A. Bross, J. McDonald, Hiroaki Aihara, A. V. Kozelov, T. Fahland, Y. M. Park, Raymond Brock, J. H. Christenson, Boaz Klima, P. Bloom, A. Boehnlein, Heriberto Castilla-Valdez, G.E. Forden, P. M. Tuts, G. P. Grim, D. Hedin, P. M. Sood, S. Banerjee, M. Demarteau, Allen Mincer, N. I. Bojko, T. Yasuda, M. Strauss, D. Norman, David H. Adams, Ricardo Piegaia, Sebastian Grinstein, E. G. Zverev, Brajesh C Choudhary, Peter Nemethy, V. Balamurali, Don Lincoln, Erich Varnes, S. Willis, M. Pang, Ulrich Heintz, Meenakshi Narain, S. Reucroft, S. R. Dugad, M. A. Shupe, L. T. Goss, C. Yoshikawa, M. Diesburg, M. Chung, D. Owen, E. Amidi, Howard Gordon, J. V.D. Wirjawan, A. Narayanan, Daniel John Karmgard, J. Tarazi, A. Jonckheere, K. C. Frame, O. Ramirez, E. Oltman, J. S. Hoftun, K. Davis, J. N. Butler, D. Casey, P. D. Grannis, H. Piekarz, J. Kotcher, J. Ellison, M. H.G. Souza, P. Yepes, N. Amos, K. W. Merritt, J. F. Bartlett, N. Graf, K. Genser, K. Streets, Vipin Bhatnagar, Robert Kehoe, R. Hernández-Montoya, Yanwen Liu, S. Fuess, H. E. Montgomery, R. Partridge, Elizabeth Gallas, Robert Snihur, H. Jostlein, Soon Yung Jun, M. L. Kelly, N. Sotnikova, H. Lan, Rajendran Raja, H. S. Mao, S. P. Denisov, R. W. Stephens, M. R. Krishnaswamy, Sarah Catherine Eno, F. Hsieh, A. Para, Sergey Chekulaev, E. A. Kozlovski, A. L. Spadafora, G. Blazey, D. P. Stoker, G. Finocchiaro, R. Jesik, P. I. Goncharov, S. Krzywdzinski, H. D. Wahl, V. I. Kochetkov, D. Buchholz, E. Flattum, V. Oguri, A. Zylberstejn, T.R. McMahon, M. Paterno, M. L. Stevenson, H. Greenlee, Vyacheslav Klyukhin, F. Nang, Brad Abbott, Richard B. Lipton, P. Tamburello, R. Astur, Andrew White, Sándor Lökös, P. Grudberg, J. Yang, A. Baden, Heng Xu, Y. E. Gutnikov, Anna Goussiou, J. Kourlas, Q. Liu, V. M. Podstavkov, M. Fortner, J. A. Wightman, C. Cretsinger, M. Strovink, John Hobbs, J. Perkins, E. James, R. Yamada, P. Gartung, N.V. Mokhov, M.K. Fatyga, Gregory R Snow, D. Chakraborty, S. H. Ahn, A. P. Heinson, J. S. Kang, R. D. Schamberger, M. R. Adams, Young-Sang Yu, S. Feher, B. S. Acharya, K. M. Mauritz, S. Lami, A. R. Clark, S. C. Loken, C. L. Kim, R. E. Hall, J. L. González Solís, Ting Hu, P.F. Ermolov, Orin I. Dahl, F. Landry, John Rutherfoord, Z. Casilum, N. A. Roe, V. S. Burtovoi, A. Brandt, A. Zieminski, R. J. Madaras, James C. Green, T. Heuring, S. Glenn, K. S. Hahn, D. Cutts, J. McKinley, D. A. Stoianova, Wagner Carvalho, S. Protopopescu, T. L.T. Thomas, Greg Landsberg, M. Merkin, T. L. Geld, S. A. Jerger, D. Vititoe, R. J. Genik, M. M. Baarmand, D. Edmunds, Cecilia Elena Gerber, Andre Sznajder, M. D. Peters, L. Oesch, Jianming Qian, C. Boswell, Suman Bala Beri, Tong Hu, T. Joffe-Minor, C. Yanagisawa, H. E. Fisk, J. Solomon, G. Wang, Alberto Santoro, H. Haggerty, P. Rubinov, Stephan Linn, N. Oshima, and Daria Zieminska

Subjects
Nuclear physics, Physics, Particle physics, Particle decay, Pair production, Branching fraction, Scalar (mathematics), General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Leptoquark, HERA, Lepton
Abstract

We have searched for the pair production of first generation scalar leptoquarks in the $\mathrm{eejj}$ channel using the full data set $(123{\mathrm{pb}}^{\ensuremath{-}1})$ collected with the D0 detector at the Fermilab Tevatron during 1992--1996. We observe no candidates with an expected background of approximately 0.4 events. Comparing the experimental 95% confidence level upper limit to theoretical calculations of the cross section with the assumption of a 100% branching fraction of $\mathrm{eq}$, we set a lower limit on the mass of a first generation scalar leptoquark of $225\mathrm{GeV}{/c}^{2}$. The results of this analysis rule out the interpretation of the excess of high ${Q}^{2}$ events at DESY HERA as leptoquarks which decay exclusively to $\mathrm{eq}$.

Published
1997

10. Measurement of the Top Quark Pair Production Cross Section inpp¯Collisions

Author

M. Nicola, J. A. Guida, L. Markosky, G. Di Loreto, D. Denisov, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, R. L. McCarthy, L. Magaña-Mendoza, D. Stewart, S. N. Gurzhiev, James Linnemann, N. Parua, M. Merkin, Stephen Wimpenny, Michael A. Strauss, Quing Zhu, T. Marshall, K. S. Hahn, P. Grudberg, D. Cutts, Raymond Brock, Boaz Klima, C. Boswell, S. Abachi, Suman Bala Beri, Darien Wood, R. D. Schamberger, M. R. Krishnaswamy, Q. Z. Li-Demarteau, Nicholas John Hadley, Greg Landsberg, S. Blessing, T. L. Geld, D. Norman, Scott Snyder, R. Markeloff, S. Willis, M. Pang, Randy Ruchti, Natalie A. Roe, M. Paterno, F. Hsieh, S. Grünendahl, A. Para, Sergey Chekulaev, J. S. Kang, S. C. Loken, A. N. Galyaev, H. D. Wahl, D. Edmunds, S. Grinstein, Andre Sznajder, C. K. Jung, M. Bhattacharjee, A. L. Lyon, Shuichi Kunori, J. Bantly, I. Adam, P. Rubinov, W. E. Cooper, L. P. Chen, Daniel R Claes, M. D. Peters, L. Oesch, R. Hirosky, R. Keohoe, Y. E. Gutnokov, R. K. Shivpuri, N. Amos, K. W. Merritt, S. A. Jerger, A. Leflat, J. F. Bartlett, S. Fuess, J. Cochran, E. James, J. Borders, J. Z.Y. Jiang, J. Drinkard, M. Tartaglia, S. Glenn, C. Klopfenstein, J. McKinley, D. A. Stoianova, Wagner Carvalho, W. G. Cobau, M. I. Martin, Kenneth Johns, Andrew Brandt, Gordon Watts, F. Borcherding, Kaushik De, J. McDonald, G. Finocchiaro, L. T. Goss, J. Kotcher, D. Vititoe, R. J. Genik, V. Sirotenko, S. Feher, H. A. Gordon, H.E. Miettinen, O. V. Eroshin, M. Abolins, M. M. Baarmand, Sarah Catherine Eno, Phillip Gutierrez, Ricardo Piegaia, E. A. Kozlovski, O. I. Dahl, H. Haggerty, S. Lökös, K. Bazizi, N. Graf, S. Banerjee, V. Balamurali, K. Streets, Vipin Bhatnagar, P. Mooney, G. Wang, Alberto Santoro, S. Reucroft, C. Yoshikawa, Vyacheslav Klyukhin, F. Nang, A. Baden, A. Zieminski, D. Buchholz, R. Partridge, N. K. Mondal, Andrew White, Heriberto Castilla-Valdez, R. Hernández-Montoya, N. Sotnikova, C. S. Mishra, B. Gibbard, H. T. Diehl, H. Singh, J. M. Hauptman, Cecilia Elena Gerber, P. Tamburello, Heng Xu, G. Guglielmo, Anna Goussiou, G. C. Blazey, T. McMahon, R. Yamada, J. Kourlas, S. H. Ahn, A. Boehnlein, P. M. Sood, H. S. Mao, J. Krane, H. Lan, J. Sculli, Allan G Clark, D. L. Adams, Jianming Qian, Q. Liu, Gregory R Snow, John Hobbs, J. Ellison, J. Yang, Vasken Hagopian, H. Weerts, P. Gartung, T. McKibben, F. Landry, John Rutherfoord, K. M. Mauritz, S. Lami, H. L. Melanson, P. Z. Quintas, P.F. Ermolov, Mary Beth Adams, M. L. Kelly, V. M. Podstavkov, Young-Sang Yu, P. Yamin, T. Fahland, K. C. Frame, O. Ramirez, M. Fortner, M.K. Fatyga, Alexander Vorobiev, Lev Dudko, R. Jesik, D. Casey, Y. Fisyak, J. Perkins, V. S. Burtovoi, G. Eppley, J. H. Christenson, A. L. Spadafora, E. Flattum, A. I. Mincer, P. I. Goncharov, S. Mani, T. Joffe-Minor, C. Yanagisawa, James C. Green, S. Choi, H. da Motta, J. G.R. Lima, H. E. Fisk, H. Tong, R. Madden, L. Rasmussen, Peter W. Draper, J. Solomon, Rajendran Raja, Yueh-Feng Liu, A. Sanchez-Hernandez, Elizaveta Shabalina, Pushpalatha C Bhat, B. Lauer, M. H.G. Souza, P. Yepes, H. E. Montgomery, A. S. Ito, T. L T Thomas, J. T. White, J. Balderston, E. G. Zverev, B. Hoeneisen, Lee Sawyer, D. Nešić, Brad Abbott, R. L. Lander, D. Lincoln, Eunil Won, P. Bloom, J. A. Wightman, Y. M. Park, S.A. Kahn, Sergey Denisov, N. I. Bojko, H. Ting, M. Demarteau, Meenakshi Narain, C. Murphy, R. Astur, J. Li, T. Heuring, A. Jonckheere, Stephan Linn, J. S. Hoftun, K. Davis, J. N. Butler, P. D. Grannis, H. Piekarz, A. Narayanan, N. Oshima, Daria Zieminska, B. Baldin, H. Li, Y. Ducros, A. Smith, E. Amidi, B. May, Victor Daniel Elvira, M. A C Cumings, D. P. Stoker, B. Gobbi, Anurag Gupta, Jasvinder A. Singh, S. Youssef, T. Yasuda, J. Featherly, Marvin Johnson, A. V. Kozelov, C. Cretsinger, J. V.D. Wirjawan, M. Strovink, V. Oguri, M. L. Stevenson, Elizabeth Gallas, D. Pušeljić, R. J. Madaras, W. Smart, Alexander Belyaev, Gervasio Gomez, C. Shaffer, D. Cullen-Vidal, K. Genser, A. Goldschmidt, N. N. Biswas, S. Chopra, Y. Pischalnikov, Ulrich Heintz, H. Jöstlein, M. Diesburg, D. Owen, J. Tarazi, V. A. Bezzubov, J. P. Negret, R. P. Smith, Michael Shupe, A. V. Kotwal, Harrison Prosper, P. M. Tuts, F. Lobkowicz, T. Rockwell, Iain Alexander Bertram, Michael Rijssenbeek, V. N. Evdokimov, J. Warchol, D.S. Koltick, J. M. Guida, D. Hedin, G. E. Forden, A. P. Heinson, Mark Sosebee, R. E. Hall, J. L. González Solís, R. Snihur, Z. Casilum, T. Huehn, N. Varelas, S. M. Chang, D. Fein, Erich Varnes, J. M. De Miranda, Soon Yung Jun, N. Grossman, S. Krzywdzinski, V. I. Kochetkov, A. Zylberstejn, P. Nemethy, H. Greenlee, Dhiman Chakraborty, Roderich Engelmann, K. Del Signore, Matthew Jones, A. Bross, Serban Protopopescu, T. G. Trippe, C. L. Kim, Hiroaki Aihara, Sharon Hagopian, A. K.A. Maciel, G. P. Grim, R. W. Stephens, L. Leuking, E. Oltman, W. Y. Chen, Gilvan Alves, George R. Kalbfleisch, V. S. Narasimham, A. A. Mayorov, M. K. Fatyga, J. Snow, J. Jaques, Ron Lipton, J. Womersley, Nikolai Mokhov, Brajesh C Choudhary, Bobby Samir Acharya, H. A. Neal, H. C. Shankar, M. Goforth, Jinhong Yu, A. Klatchko, M. Chung, Sun Kee Kim, E. W. Anderson, P. Padley, Alexey Volkov, Mitchell Wayne, H. Schellman, J. M. Kohli, J. Thompson, B. Gómez, Z. H. Zhu, Shashikant Dugad, A. V. Kostritskiy, B. G. Pope, and Sissel Hansen

Subjects
Physics, Top quark, Particle physics, Luminosity (scattering theory), Tevatron, General Physics and Astronomy, D0 experiment, law.invention, Nuclear physics, Pair production, law, Fermilab, Collider, Lepton
Abstract

We present a measurement of the ttbar production cross section in ppbar collisions at root(s) = 1.8TeV by the D0 experiment at the Fermilab Tevatron. The measurement is based on data from an integrated luminosity of approximately 125 pb^-1 accumulated during the 1992-1996 collider run. We observe 39 ttbar candidate events in the dilepton and lepton+jets decay channels with an expected background of 13.7+-2.2 events. For a top quark mass of 173.3GeV/c^2, we measure the ttbar production cross section to be 5.5+-1.8 pb.

Published
1997

11. Limits on AnomalousWWγCouplings frompp¯→Wγ+XEvents at√s=1.8TeV

Author

B. Baldin, Y. Ducros, J. B. Singh, S. Youssef, Robert J. McCarthy, A. Sanchez-Hernandez, D.R. Green, J. Balderston, Eunil Won, Victor Daniel Elvira, M. Nicola, P. Bloom, N. I. Bojko, Yu. Pischalnikov, M. A. Shupe, J. S. Hoftun, J. N. Butler, P. D. Grannis, H. Piekarz, M. Bhattacharjee, Bobby Samir Acharya, Gordon Watts, J. M. Hauptman, B. May, Peter Nemethy, V. Sirotenko, O. V. Eroshin, V. A. Bezzubov, A. Jonckheere, J. P. Negret, Stephan Linn, Andrew White, H. L. Melanson, P. Z. Quintas, R. P. Smith, H. A. Neal, H. C. Shankar, N. Oshima, S. K. Kim, Phillip Gutierrez, Daria Zieminska, B. Gobbi, J. H. Christenson, M. H.G. Souza, J. F. Lebrat, Matthew Jones, S. M. Chang, Howard Gordon, G. Eppley, H. da Motta, J. G.R. Lima, K. C. Frame, Heriberto Castilla-Valdez, A. V. Kotwal, Harrison Prosper, M. Abolins, O. Ramirez, H. E. Montgomery, A. S. Ito, G.E. Forden, M. Goforth, G. Álvarez, L. T. Kerth, Q. Z. Li-Demarteau, P. Mooney, J. Kotcher, S. P. Denisov, D. Stewart, F. Lobkowicz, N. Parua, Randy Ruchti, N. Graf, Sebastien Jonathan Kahn, S. N. Gurzhiev, P. Yamin, N. K. Mondal, K. Streets, Vipin Bhatnagar, H. T. Diehl, M. R. Krishnaswamy, T. Rockwell, Iain Alexander Bertram, C. S. Mishra, C. Klopfenstein, R. Partridge, H. Singh, S. Lami, J. Krane, G. Griffin, Michael Rijssenbeek, J. M. Guida, P.F. Ermolov, A. Boehnlein, F. Hsieh, S. Mani, H. S. Mao, D. L. Adams, P. M. Sood, Vasken Hagopian, R. Astur, V. S. Burtovoi, A. Para, H. Weerts, Dhiman Chakraborty, J. Ellison, Sergey Chekulaev, J. Bendich, V. N. Evdokimov, D.S. Koltick, Meenakshi Narain, A. Klatchko, Lev Dudko, J. T. Linnemann, R. W. Stephens, S. Fuess, J. T. White, R. Madden, M. Chung, L. Rasmussen, L. Lueking, I. Adam, Quing Zhu, T. Heuring, Peter W. Draper, W. M. Smart, S. Glenn, Pushpalatha C Bhat, M. Mudan, R. J. Madaras, D. P. Stoker, G. Wang, Alberto Santoro, K. Del Signore, H. Haggerty, K. W. Merritt, J. McKinley, D. A. Stoianova, Wagner Carvalho, A. Narayanan, T. G. Trippe, D. Buchholz, A. L. Spadafora, P. I. Goncharov, J. F. Bartlett, B. Lauer, B. Hoeneisen, Lee Sawyer, Hiroaki Aihara, Robert Kehoe, P. Tamburello, Heng Xu, Cecilia Elena Gerber, Sharon Hagopian, W. Guryn, M. Sosebee, A. K.A. Maciel, Anna Goussiou, S. Fahey, Yanwen Liu, P. M. Tuts, G. P. Grim, J. Jaques, D. Hedin, Hui Li, J. A. Wightman, A. M. Smith, A. Leflat, Robert Hirosky, Y. M. Park, Robert Snihur, Jianming Qian, D. Vititoe, R. J. Genik, J. Bantly, Gregory R Snow, J. Womersley, K. Bazizi, M. Demarteau, W. Y. Chen, Gilvan Alves, M. L. Kelly, George R. Kalbfleisch, W. G. Cobau, M. I. Martin, J. S. Kang, Y. Fisyak, Paolo Franzini, V. S. Narasimham, Tong Hu, C. Boswell, J. Featherly, L. Markosky, A. A. Mayorov, Joan A. Guida, S. Abachi, E. G. Zverev, Andrew Brandt, R. Engelmann, Liu Chen, Brajesh C Choudhary, V. Glebov, Marvin Johnson, A. L. Lyon, M. K. Fatyga, T. Joffe-Minor, C. Yanagisawa, J. Snow, N. Sotnikova, G. Di Loreto, H.E. Miettinen, Suman Bala Beri, A. V. Kozelov, H. E. Fisk, J. Solomon, D. Denisov, J. McDonald, Srinivasan Rajagopalan, Thomas Ferbel, D. Edmunds, C. Cretsinger, M. Strovink, E. James, B. I. Klochkov, Andre Sznajder, M. D. Peters, Shuichi Kunori, K. A. Johns, L. Oesch, P. Robinov, S. Banerjee, V. Balamurali, C. T. Murphy, C. K. Jung, T. McKibben, Alexander Vorobiev, S. Reucroft, C. Yoshikawa, B. G. Pope, Elizaveta Shabalina, P. Grudberg, Y. E. Gutnikov, J. Kourlas, Q. Liu, John Hobbs, Young-Sang Yu, N. A. Roe, D. Pušeljić, E. Flattum, A. Bischoff, A. V. Kostritskiy, Sissel Hansen, G. Guglielmo, E. W. Anderson, V. Oguri, Allen Mincer, T.R. McMahon, M. Paterno, M. L. Stevenson, J. Warchol, P. Padley, Alexey Volkov, James H Cochran, Mitchell Wayne, H. Schellman, J. M. Kohli, Stefan Grünendahl, J. Thompson, B. Gómez, Z. H. Zhu, Shashikant Dugad, Elizabeth Gallas, H. Jostlein, R. Hernández-Montoya, H. Lan, A. N. Galyaev, G. Finocchiaro, H. D. Wahl, W. E. Cooper, Daniel R Claes, E. Amidi, T. Yasuda, J. V.D. Wirjawan, Allan G Clark, P. Gartung, M.K. Fatyga, C. L. Kim, Jong-Sung Yu, L. Magaña-Mendoza, N.V. Mokhov, Raymond Brock, Boaz Klima, D. Norman, S. Willis, M. Pang, A. P. Heinson, K. S. Hahn, D. Cutts, Greg Landsberg, R. E. Hall, T. L. Geld, J. L. González Solís, E. Oltman, F. Borcherding, M. M. Baarmand, Sarah Catherine Eno, S. Krzywdzinski, Sándor Lökös, J. Yang, Vyacheslav Klyukhin, V. I. Kochetkov, F. Nang, Richard B. Lipton, Ying Li, A. Baden, G. C. Blazey, R. Yamada, A. Zylberstejn, S. H. Ahn, V. M. Podstavkov, H. Greenlee, Orin I. Dahl, John Rutherfoord, Mary Beth Adams, M. Fortner, James C. Green, A. Bross, J. Perkins, Alexander Belyaev, Serban Protopopescu, Ulrich Heintz, M. Diesburg, D. Owen, S. Choi, J. Tarazi, N. Grossman, J. Borders, Gervasio Gomez, T. Huehn, C. Shaffer, D. Cullen-Vidal, A. Goldschmidt, N. N. Biswas, D. Fein, S. Chopra, J. Z.Y. Jiang, Don Lincoln, Erich Varnes, J. M. De Miranda, L. T. Goss, Jing Li, B. Gibbard, E. A. Kozlovski, J. Sculli, Nikos Varelas, R. K. Shivpuri, D. Nesic, S. A. Jerger, R. D. Schamberger, S. C. Loken, J. Drinkard, T. Fahland, M. Tartaglia, S. Feher, Ting Hu, Kaushik De, A. Zieminski, P. A. Rapidis, S. Y. Jun, T. L.T. Thomas, D. Casey, S. H. Aronson, P. Yepes, K. Genser, Rajendran Raja, Brad Abbott, N. Amos, Stephen Wimpenny, M. A. C. Cummings, T. Marshall, Darien Wood, Nicholas John Hadley, S. Blessing, Scott Snyder, and R. Markeloff

Subjects
Massless particle, Physics, Coupling, Particle physics, Gauge boson, Branching fraction, Particle model, General Physics and Astronomy, Elementary particle, Standard Model, Boson
Abstract

We have measured the $\mathrm{WW}\ensuremath{\gamma}$ gauge boson coupling parameters using $p\overline{p}\ensuremath{\rightarrow}\ensuremath{\ell}\ensuremath{\nu}\ensuremath{\gamma}+X$ ( $\ensuremath{\ell}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}e,\ensuremath{\mu}$) events at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8$ TeV. The data, corresponding to an integrated luminosity of $92.8{\mathrm{pb}}^{\ensuremath{-}1}$, were collected using the D\O{} detector at the Fermilab Tevatron Collider. The measured cross section times branching ratio for $p\overline{p}\ensuremath{\rightarrow}W\ensuremath{\gamma}+X$ with ${p}_{T}^{\ensuremath{\gamma}}g10$ GeV/c and ${R}_{\ensuremath{\ell}\ensuremath{\gamma}}g0.7$ is ${11.3}_{\ensuremath{-}1.5}^{+1.7}\ifmmode\pm\else\textpm\fi{}1.5$ pb, in agreement with the standard model prediction. The 1 degree of freedom 95% confidence level limits on individual CP-conserving parameters are $\ensuremath{-}0.93l\ensuremath{\Delta}\ensuremath{\kappa}l0.94$ and $\ensuremath{-}0.31l\ensuremath{\lambda}l0.29$. Similar limits are set on the CP-violating coupling parameters.

Published
1997

12. Study of theZZγandZγγCouplings inZ(νν)γProduction

Author

S. P. Denisov, M. R. Krishnaswamy, F. Hsieh, A. R. Clark, Hui Li, A. Para, Sergey Chekulaev, J. Bantly, I. Adam, K. W. Merritt, J. F. Bartlett, Robert Kehoe, Yanwen Liu, Robert Snihur, M. L. Kelly, H. A. Neal, H. C. Shankar, S. R. Dugad, R. Markeloff, Howard Gordon, K. C. Frame, O. Ramirez, B. Gibbard, M. Goforth, J. M. Hauptman, J. Sculli, Andrew Brandt, R. Engelmann, Liu Chen, H.E. Miettinen, L. A. Markosky, P. Bloom, S. Feher, J. Jaques, N. I. Bojko, Nikos Varelas, A. N. Galyaev, Ting Hu, J. Womersley, Gervasio Gomez, Heriberto Castilla-Valdez, G. Guglielmo, A. Zieminski, W. E. Cooper, G. Finocchiaro, M. Abolins, M. Nicola, M. A. Shupe, Yu. Pischalnikov, Marc M Baarmand, H. D. Wahl, P. Mooney, C. Shaffer, J. S. Hoftun, K. Davis, J. N. Butler, D. Cullen-Vidal, E. W. Anderson, A. Goldschmidt, Elizabeth Gallas, H. Jostlein, P. A. Rapidis, N. K. Mondal, H. T. Diehl, H. Singh, P. D. Grannis, E. G. Zverev, H. Piekarz, L. Lueking, N. N. Biswas, M. Strauss, J. Krane, A. Boehnlein, Brajesh C Choudhary, Jong-Sung Yu, P. M. Sood, T. Yasuda, S. Chopra, Peter Nemethy, B. May, G. Eppley, J. Ellison, H. da Motta, K. Del Signore, L. Magaña-Mendoza, S. Fuess, J. G.R. Lima, S. Y. Jun, B. Gobbi, R. Partridge, T. L.T. Thomas, A. S. Ito, C. S. Mishra, R. D. Schamberger, Allen Mincer, S. C. Loken, R. Jesik, Hiroaki Aihara, G.E. Forden, R. Hernández-Montoya, Sebastian Grinstein, Raymond Brock, Boaz Klima, D. Stewart, Jing Li, H. Lan, Sebastien Jonathan Kahn, S. N. Gurzhiev, J. Cochran, P. M. Tuts, D. Norman, A. D. Bross, G. P. Grim, V. A. Bezzubov, Vasken Hagopian, J. P. Negret, R. P. Smith, H. Weerts, S. Willis, M. Pang, K. S. Hahn, D. Cutts, Lev Dudko, M. Merkin, S. Protopopescu, V. Oguri, Greg Landsberg, D. Buchholz, T.R. McMahon, M. Paterno, M. L. Stevenson, Quing Zhu, S. Lami, T. L. Geld, Shuichi Kunori, K. A. Johns, Harrison Prosper, J. Warchol, P. Gartung, M.K. Fatyga, J. T. White, D. Casey, C. T. Murphy, Sándor Lökös, J. Yang, J. Kotcher, B. S. Acharya, D. Nesic, C. L. Kim, Matthew Jones, Robert Hirosky, P. Tamburello, V. M. Podstavkov, S. A. Jerger, N. Graf, A. Klatchko, E. Amidi, J. V.D. Wirjawan, M. Fortner, J. Perkins, M. Chung, S. Youssef, S. Choi, Robert J. McCarthy, W. Y. Chen, Heng Xu, Gilvan Alves, R. K. Shivpuri, D. Hedin, S. M. Chang, H. L. Melanson, P. Z. Quintas, A. Sanchez-Hernandez, George R. Kalbfleisch, V. S. Narasimham, S. Reucroft, D. R. Claes, J. Drinkard, M. Tartaglia, Ulrich Heintz, A. Gupta, Q. Z. Li-Demarteau, Anna Goussiou, D.R. Green, J. Balderston, S. K. Kim, J. H. Christenson, Meenakshi Narain, A. V. Kotwal, C. Yoshikawa, Kaushik De, P. C. Bhat, F. Lobkowicz, M. Diesburg, A. A. Mayorov, David H. Adams, M. K. Fatyga, T. Rockwell, Iain Alexander Bertram, N. Parua, J. A. Wightman, A. M. Smith, J. Snow, Eunil Won, A. L. Spadafora, D. Owen, P. I. Goncharov, A. Narayanan, Michael Rijssenbeek, C. Klopfenstein, K. Streets, Vipin Bhatnagar, P. Yepes, Randy Ruchti, A. V. Kostritskiy, N. Amos, K. Genser, J. Tarazi, B. Baldin, Gregory R Snow, Y. Ducros, J. B. Singh, Rajendran Raja, Stephen Wimpenny, V. N. Evdokimov, D.S. Koltick, J. T. Linnemann, Sissel Hansen, T. Marshall, Joan A. Guida, Gordon Watts, V. Sirotenko, N.V. Mokhov, Darien Wood, W. M. Smart, N. Sotnikova, G. Di Loreto, O. V. Eroshin, H. S. Mao, Phillip Gutierrez, Victor Daniel Elvira, Brad Abbott, Nicholas John Hadley, A. P. Heinson, S. Blessing, T. G. Trippe, D. Denisov, Scott Snyder, K. Bazizi, Srinivasan Rajagopalan, Sharon Hagopian, A. K.A. Maciel, Thomas Ferbel, R. E. Hall, J. L. González Solís, D. Edmunds, Y. Fisyak, T. Huehn, R. Lander, D. Fein, R. Piegaia, D. Chakraborty, J. Featherly, P. Padley, Alexey Volkov, Don Lincoln, Marvin Johnson, K. M. Mauritz, Andre Sznajder, Erich Varnes, J. M. De Miranda, A. L. Lyon, A. V. Kozelov, Mitchell Wayne, H. Schellman, J. M. Kohli, P.F. Ermolov, Stefan Grünendahl, J. Thompson, V. S. Burtovoi, B. Gómez, M. D. Peters, L. Oesch, M. Demarteau, Z. H. Zhu, Alexander Belyaev, C. Cretsinger, N. Grossman, M. Strovink, J. Borders, S. Krzywdzinski, E. James, V. I. Kochetkov, T. Fahland, J. Z.Y. Jiang, A. Zylberstejn, Jan M. Guida, C. Boswell, H. Greenlee, L. T. Goss, S. Abachi, R. Astur, M. Bhattacharjee, Suman Bala Beri, E. A. Kozlovski, R. J. Madaras, P. Yamin, S. Mani, T. Heuring, S. Glenn, J. McKinley, D. A. Stoianova, Wagner Carvalho, R. Madden, L. Rasmussen, Peter W. Draper, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, D. Vititoe, R. J. Genik, Y. M. Park, R. W. Stephens, M. H.G. Souza, H. E. Montgomery, D. P. Stoker, A. Jonckheere, A. P. Vorobiev, Stephan Linn, N. Oshima, Daria Zieminska, A. Leflat, M. I. Martin, J. S. Kang, J. McDonald, S. Banerjee, V. Balamurali, B. G. Pope, Elizaveta Shabalina, C. K. Jung, T. McKibben, Cecilia Elena Gerber, Jianming Qian, Tong Hu, D. Pušeljić, E. Flattum, G. Wang, Alberto Santoro, H. Haggerty, P. Rubinov, T. Joffe-Minor, C. Yanagisawa, H. E. Fisk, Andrew White, J. Solomon, P. Grudberg, Y. E. Gutnikov, J. Kourlas, Q. Liu, John Hobbs, M. R. Adams, Young-Sang Yu, N. A. Roe, F. Borcherding, E. Oltman, Sarah Catherine Eno, Vyacheslav Klyukhin, F. Nang, Richard B. Lipton, A. Baden, G. C. Blazey, R. Yamada, S. H. Ahn, Orin I. Dahl, F. Landry, John Rutherfoord, James C. Green, W. G. Cobau, and M. Sosebee

Subjects
Physics, General Physics and Astronomy
Published
1997

13. Search for Diphoton Events with Large Missing Transverse Energy inpp¯Collisions at=1.8TeV

Author

Stephen Wimpenny, D. Stewart, S. N. Gurzhiev, T. Marshall, J. Bendich, Darien Wood, Nicholas John Hadley, S. Blessing, G. Wang, Alberto Santoro, Scott Snyder, Quing Zhu, R. Markeloff, Seong Keun Kim, J. Mc Donald, C. L. Kim, Hiroaki Aihara, S. Fuess, S. Glenn, P. M. Tuts, G. P. Grim, D. A. Stoianova, R. W. Stephens, Suyong Choi, Gordon Watts, Wagner Carvalho, V. Sirotenko, O. V. Eroshin, Phillip Gutierrez, E. G. Zverev, L. Markosky, Joan A. Guida, D. Vititoe, G. Di Loreto, D. Nešić, S. Youssef, R. J. Genik, J. Jaques, A. Sanchez-Hernandez, Haifeng Li, Ron Lipton, T. Joffe-Minor, D. Denisov, C. S. Mishra, N. Parua, C. Yanagisawa, Matthew Jones, G. Guglielmo, R. Snihur, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, Randy Ruchti, Andrew White, H. E. Fisk, C. Boswell, Robert Kehoe, J. Womersley, P. Grudberg, Y. E. Gutnikov, Vasken Hagopian, N. Varelas, H. Weerts, J. Kourlas, J. Balderston, J. Yang, B. Gibbard, Lev Dudko, Meenakshi Narain, S. Abachi, Nikolai Mokhov, S. M. Chang, D. Lincoln, J. Solomon, M. Nicola, V. M. Podstavkov, F. Lobkowicz, M. H.G. Souza, P. Yamin, Suman Bala Beri, Eunil Won, P. Bloom, J. A. Wightman, N. I. Bojko, I. Adam, P. Rubinov, K. W. Merritt, Q. Z. Li Demarteau, A. L. Spadafora, Brajesh C Choudhary, Alexander Vorobiev, Q. Liu, John Hobbs, Young-Sang Yu, M. L. Stevenson, B. May, M. Fortner, J. Perkins, P. Yepes, H. E. Montgomery, W. Y. Chen, Gilvan Alves, George R. Kalbfleisch, J. S. Hoftun, J. N. Butler, A. Narayanan, M. Sosebee, P. D. Grannis, S. Fahey, Paolo Franzini, V. S. Narasimham, Thomas G Trippe, B. I. Klochkov, M. Bhattacharjee, D. Pušeljić, S. Mani, R. Madden, L. Rasmussen, Peter W. Draper, R. Jesik, H. Piekarz, A. N. Galyaev, Bobby Samir Acharya, H. A. Neal, B. Gobbi, D. P. Stoker, A. A. Mayorov, J. M. Hauptman, Cecilia Elena Gerber, R. Hirosky, D. Edmunds, H. C. Shankar, J. T. Linnemann, P. I. Goncharov, W. Guryn, P. A. Rapidis, M. K. Fatyga, J. Bantly, M. Goforth, A. L. Lyon, Andre Sznajder, Shuichi Kunori, B. Baldin, W. E. Cooper, J. F. Bartlett, Jianming Qian, Yanwen Liu, L. Lueking, Dhiman Chakraborty, Jasvinder A. Singh, M. D. Peters, Jinhong Yu, J. Snow, S. Lami, L. T. Kerth, Y. Ducros, A. Jonckheere, P.F. Ermolov, B. G. Pope, Stephan Linn, T. Rockwell, Iain Alexander Bertram, Michael Rijssenbeek, Daniel R Claes, L. Oesch, T. Yasuda, A. Klatchko, Tong Hu, V. N. Evdokimov, K. Bazizi, N. Oshima, K. Del-Signore, M. Abolins, Daria Zieminska, Andrew Brandt, R. Engelmann, Liu Chen, J. L. González-Solís, T. Mc Mahon, R. D. Schamberger, A. Smith, N. A. Roe, G. Finocchiaro, Sharon Hagopian, T. Mc Kibben, C. Murphy, D.S. Koltick, P. Mooney, R. Astur, S. P. Denisov, V. Oguri, J. F. Lebrat, M. Chung, Elizaveta Shabalina, Victor Daniel Elvira, T. Heuring, H.E. Miettinen, A. K.A. Maciel, V. S. Burtovoi, Heriberto Castilla-Valdez, N. K. Mondal, Pushpalatha C Bhat, M. Mudan, H. T. Diehl, M. R. Krishnaswamy, A. Boehnlein, Peter Nemethy, J. T. White, F. Hsieh, J. Warchol, L. Magaña-Mendoza, P. M. Sood, G. Eppley, S. Reucroft, C. Yoshikawa, S. A. Jerger, S. Grünendahl, A. Para, J. Ellison, B. Lauer, M. A.C. Cummings, B. Hoeneisen, Sergey Chekulaev, W. G. Cobau, M. I. Martin, J. S. Kang, H. da Motta, J. G.R. Lima, C. K. Jung, Raymond Brock, Boaz Klima, Elizabeth Gallas, N. Amos, Lee Sawyer, A. S. Ito, D. Norman, S. Banerjee, J. Borders, S. Willis, M. Pang, V. Balamurali, J. Z.Y. Jiang, M. L. Kelly, Howard Gordon, Y. M. Park, K. C. Frame, O. Ramirez, L. T. Goss, D. Buchholz, S.A. Kahn, M. Demarteau, R. J. Madaras, W. Smart, K. A. Johns, E. A. Kozlovski, P. Tamburello, Heng Xu, H. Haggerty, Anna Goussiou, S. Lökös, E. Amidi, J. M. Guida, D. Hedin, Gregory R Snow, J. V.D. Wirjawan, V. A. Bezzubov, J. P. Negret, R. P. Smith, Michael Shupe, A. V. Kotwal, Harrison Prosper, F. Borcherding, E. Oltman, M. M. Baarmand, Sarah Catherine Eno, Vyacheslav Klyukhin, F. Nang, Ying Li, A. Baden, J. Sculli, R. K. Shivpuri, G. C. Blazey, J. Drinkard, M. Tartaglia, Kaushik De, R. Yamada, S. H. Aronson, S. H. Ahn, Orin I. Dahl, John Rutherfoord, Mary Beth Adams, H. D. Wahl, P. Padley, Alexey Volkov, James H Cochran, James C. Green, Mitchell Wayne, A. Leflat, H. Schellman, J. M. Kohli, J. Thompson, K. S. Hahn, B. Gómez, Z. H. Zhu, D. Cutts, Shashikant Dugad, A. Bischoff, A. V. Kostritskiy, Greg Landsberg, Sissel Hansen, T. L. Geld, M. Paterno, E. W. Anderson, H. Singh, J. Mc Kinley, Allen Mincer, C. Klopfenstein, A. Goldschmidt, R. Hernández-Montoya, N. Sotnikova, T. Fahland, J. Krane, H. Lan, Allan G Clark, S. Feher, Ting Hu, P. Gartung, M.K. Fatyga, A. Zieminski, S. Y. Jun, T. L.T. Thomas, D. Casey, Y. Pischalnikov, Ulrich Heintz, H. Jöstlein, M. Diesburg, D. Owen, J. Tarazi, Rajendran Raja, Alexander Belyaev, Gervasio Gomez, S. C. Loken, C. Shaffer, D. Cullen-Vidal, K. Genser, N. N. Biswas, S. Chopra, Brad Abbott, G. E. Forden, A. P. Heinson, R. E. Hall, T. Huehn, D. Fein, Erich Varnes, J. M. De Miranda, N. Grossman, Jing Li, S. Krzywdzinski, V. I. Kochetkov, A. Zylberstejn, H. Greenlee, A. Bross, Serban Protopopescu, C. Cretsinger, M. Strovink, E. James, R. Mc Carthy, J. Featherly, V. Glebov, Marvin Johnson, A. V. Kozelov, K. Streets, Vipin Bhatnagar, R. Partridge, E. Flattum, G. Griffin, H. S. Mao, D. L. Adams, H. L. Melanson, P. Z. Quintas, Y. Fisyak, J. H. Christenson, G. Álvarez, J. Kotcher, and N. Graf

Subjects
Physics, Particle physics, Selectron tube, Pseudorapidity, Neutralino, General Physics and Astronomy, Gravitino, Elementary particle, Supersymmetry, Lepton, Boson
Abstract

A search for new physics has been carried out in the channel pp→γγ+E T , as expected in various supersymmetric models. We require two photons with transverse energy E T γ >12GeV and pseudorapidity |η γ | T ) is consistent with background and no events have E T >25GeV. We set limits on production cross sections for selectron, sneutrino, and neutralino pairs, decaying into photons, which range from about 400 fb to 1 pb depending on the sparticle masses. A general limit of 185 fb (95% C.L.) is set on σ(pp→γγE T +X), where E T γ >12GeV, |η γ | T >25GeV.

Published
1997

14. Isolated Photon Cross Section in the Central and Forward Rapidity Regions inpp¯Collisions at√s=1.8TeV

Author

T. McKibben, M. V. S. Rao, N. Parua, C. Murphy, Sunanda Banerjee, R. Astur, Alexander Vorobiev, T. Heuring, B. Gibbard, J. Jaques, A. N. Galyaev, S. Krzywdzinski, V. I. Kochetkov, Pushpalatha C Bhat, A. Zylberstejn, S. Igarashi, P. R. G. Virador, H. Greenlee, A. Bross, Ron Lipton, Serban Protopopescu, J. Sculli, M. Mudan, Q. Z. Li-Demarteau, G. Eppley, D. Casey, W. Y. Chen, J. Womersley, I. Adam, P. Rubinov, Randy Ruchti, F. Borcherding, K. W. Merritt, George R. Kalbfleisch, Nikolai Mokhov, K. Streets, Vipin Bhatnagar, H. da Motta, J. G.R. Lima, H. D. Wahl, D. Pušeljić, M. Abolins, H. Tong, C. S. Mishra, A. L. Spadafora, Paolo Franzini, V. S. Narasimham, Thomas G Trippe, W. X. Gu, S. Margulies, S. Lami, W. E. Cooper, Daniel R Claes, G. Guglielmo, J. F. Bartlett, B. Hoeneisen, Lee Sawyer, P.F. Ermolov, E. Oltman, Rajendran Raja, S. Feher, R. Partridge, P. Mooney, S. C. Loken, E. Flattum, S. A. Jerger, C. Cretsinger, Stephen Wimpenny, M. A. C. Cummings, A. A. Mayorov, M. K. Fatyga, A. Leflat, J. Bendich, Vasken Hagopian, H. Weerts, Yanwen Liu, M. Strovink, E. Amidi, Suyong Choi, J. Snow, J. V.D. Wirjawan, J. R. T. de Mello Neto, E. James, L. Lueking, G. Griffin, A. S. Ito, N. K. Mondal, H. T. Diehl, B. May, R. Snihur, M. M. Baarmand, Sarah Catherine Eno, Brajesh C Choudhary, W. G. Cobau, M. I. Martin, Brad Abbott, T. Marshall, V. S. Burtovoi, J. S. Kang, Y. M. Park, S. Glenn, S.A. Kahn, J. McKinley, D. A. Stoianova, Wagner Carvalho, Gilvan Alves, M. Bhattacharjee, Darien Wood, Nicholas John Hadley, N. Varelas, M. Demarteau, R. E. Avery, A. Boehnlein, P. M. Sood, J. Ellison, S. Fuess, S. Blessing, Vyacheslav Klyukhin, Ying Li, A. Baden, H. Tao, G. C. Blazey, R. Hirosky, Scott Snyder, K. Bazizi, R. Markeloff, Elizabeth Gallas, R. Hatcher, N. A. Roe, C. H. Park, H. S. Mao, A. Bischoff, D. L. Adams, J. F. Glicenstein, A. V. Kostritskiy, Andrew White, M. Chung, Matthew Jones, P. A. Rapidis, I. Bertram, S. M. Chang, B. Gobbi, G. Wang, Alberto Santoro, Seong Keun Kim, Jasvinder A. Singh, M. Nichola, R. K. Shivpuri, R. Yamada, S. Youssef, C. Klopfenstein, C. L. Kim, Hiroaki Aihara, A. Jonckheere, F. Lobkowicz, D. Vititoe, Gordon Watts, P. Grudberg, T. McMahon, Stephan Linn, H. Johnstad, T. Joffe-Minor, T. Yasuda, C. Yanagisawa, A. Zieminski, H. E. Fisk, Y. E. Gutnikov, J. Drinkard, H. Johari, V. Balamurali, S. H. Ahn, R. J. Genik, P. I. Goncharov, Kenneth Johns, V. Sirotenko, W. Guryn, M. Tartaglia, P. M. Tuts, J. Featherly, V. Glebov, L. Markosky, Joan A. Guida, R. W. Stephens, J. Kourlas, B. G. Pope, N. Oshima, Sissel Hansen, O. V. Eroshin, D. Buchholz, Marvin Johnson, J. Solomon, W. Smart, G. Di Loreto, A. V. Kozelov, Orin I. Dahl, John Rutherfoord, T. L. Taylor, Kaushik De, Phillip Gutierrez, Mary Beth Adams, S. H. Aronson, Daria Zieminska, John Hobbs, R. D. Schamberger, A. Smith, J. F. Lebrat, E. G. Zverev, P. Tamburello, Heng Xu, C. Boswell, Dhiman Chakraborty, Elizaveta Shabalina, F. Nang, Young-Sang Yu, T. Rockwell, Raymond Brock, Boaz Klima, R. L. Dixon, Robert Kehoe, D. Nešić, S. Abachi, Heriberto Castilla-Valdez, Y. Pischalnikov, Ulrich Heintz, M. L. Kelly, G. Álvarez, V. Oguri, Bobby Samir Acharya, H. A. Neal, H. C. Shankar, D. Norman, J. T. Linnemann, J. Balderston, Howard Gordon, James C. Green, S. Y. Jun, B. I. Klochkov, Michael Rijssenbeek, K. C. Frame, O. Ramirez, P. Yamin, H. Jöstlein, R. Hernández-Montoya, J. M. Hauptman, Suman Bala Beri, D. Denisov, Cecilia Elena Gerber, J. T. White, Sharon Hagopian, M. Goforth, S. Willis, M. Pang, K. S. Hahn, D. Cutts, C. K. Jung, J. Kotcher, A. K.A. Maciel, Haifeng Li, S. Mani, Jinhong Yu, J. Warchol, Gregory R Snow, Greg Landsberg, R. L. McCarthy, M. Diesburg, S. P. Denisov, Srinivasan Rajagopalan, Jianming Qian, R. Madden, A. L. Read, Allan G Clark, A. Klatchko, D. Lincoln, Thomas Ferbel, Dan Green, T. L. Geld, H. Ting, L. Rasmussen, Peter W. Draper, A. Goldschmidt, M. R. Krishnaswamy, Eunil Won, P. Padley, D. Owen, Alexey Volkov, James H Cochran, M. Paterno, D. Edmunds, E. Neis, F. Hsieh, S. Grünendahl, Mitchell Wayne, M.K. Fatyga, J. Tarazi, Meenakshi Narain, A. Peryshkin, H. Schellman, J. M. Kohli, V. N. Evdokimov, Andre Sznajder, A. Para, Sergey Chekulaev, B. Baldin, Peter Nemethy, N. Graf, J. Thompson, M. D. Peters, D.S. Koltick, T. Fahland, Y. Ducros, S. Fahey, Gervasio Gomez, B. Gómez, Z. H. Zhu, L. Oesch, J. Wilcox, Shashikant Dugad, A. Narayanan, M. H.G. Souza, P. Yepes, Victor Daniel Elvira, M. Sosebee, C. Shaffer, D. Cullen-Vidal, K. Genser, R. J. Madaras, P. Bloom, N. N. Biswas, H. E. Montgomery, J. A. Wightman, J. Alitti, N. I. Bojko, S. Chopra, J. Bantly, D. Stewart, S. N. Gurzhiev, F. Wen, E. W. Anderson, H. L. Melanson, P. Z. Quintas, L. T. Kerth, Andrew Brandt, M. L. Stevenson, R. Engelmann, Liu Chen, J. M. Guida, D. Hedin, Quing Zhu, J. S. Hoftun, J. N. Butler, H.E. Miettinen, P. D. Grannis, H. Piekarz, D. P. Stoker, Allen Mincer, V. A. Bezzubov, J. P. Negret, Y. Fisyak, J. H. Christenson, R. P. Smith, Michael Shupe, Harrison Prosper, T. Huehn, D. Fein, Erich Varnes, J. M. De Miranda, N. Grossman, Jing Li, G. E. Forden, A. P. Heinson, R. E. Hall, J. L. González Solís, N. Amos, J. Yang, V. M. Podstavkov, M. Fortner, J. Perkins, J. Borders, J. Z.Y. Jiang, L. T. Goss, E. A. Kozlovski, H. Haggerty, S. Lökös, A. L. Lyon, Shuichi Kunori, G. Finocchiaro, N. Denisenko, S. Reucroft, and C. Yoshikawa

Subjects
Physics, Particle physics, Luminosity (scattering theory), Calorimeter (particle physics), Meson, Physics::Instrumentation and Detectors, Tevatron, General Physics and Astronomy, law.invention, Nuclear physics, law, Pseudorapidity, High Energy Physics::Experiment, Rapidity, Fermilab, Nuclear Experiment, Collider
Abstract

A measurement of the cross section for production of single, isolated photons is reported for transverse energies in the range of 10–125 GeV for two regions of pseudorapidity, |η| -1 of integrated luminosity accumulated in pp collisions at √s=1.8TeV and recorded with the D0 detector at the Fermilab Tevatron Collider. The background, predominantly from jets which fragment to neutral mesons, is estimated using the longitudinal shower shape in the calorimeter. In both pseudorapidity regions the cross section is found to agree with the next-to-leading order QCD prediction for 30≲E T γ ≲80GeV.

Published
1996

15. Search for AnomalousWWandWZProduction inpp¯Collisions ats=1.8TeV

Author

N. I. Bojko, M. A. Shupe, J. S. Hoftun, J. N. Butler, P. D. Grannis, H. Piekarz, B. Baldin, Y. Ducros, J. B. Singh, Victor Daniel Elvira, S. Youssef, S. Choi, Robert J. McCarthy, A. Sanchez-Hernandez, D.R. Green, J. Balderston, Eunil Won, W. M. Smart, T. G. Trippe, J. M. Hauptman, L. A. Markosky, Robert Hirosky, C. Cretsinger, B. Gibbard, M. Strovink, S. H. Aronson, Shuichi Kunori, E. James, K. A. Johns, R. D. Schamberger, S. C. Loken, A. N. Galyaev, W. Y. Chen, Gilvan Alves, George R. Kalbfleisch, T. L. Taylor, Sharon Hagopian, C. T. Murphy, M. Bhattacharjee, J. Sculli, Nikos Varelas, T. Hu, A. K.A. Maciel, Heriberto Castilla-Valdez, Paolo Franzini, V. S. Narasimham, W. X. Gu, C. K. Jung, T. McKibben, K. S. Hahn, D. Cutts, M. V. S. Rao, D. Stewart, Sebastien Jonathan Kahn, S. N. Gurzhiev, T. Huehn, D. Fein, D. Chakraborty, A. A. Mayorov, W. E. Cooper, M. Nicola, Yu. Pischalnikov, S. Protopopescu, Greg Landsberg, R. K. Shivpuri, D. R. Claes, N. Denisenko, S. Reucroft, J. Drinkard, Don Lincoln, Erich Varnes, J. M. De Miranda, M. K. Fatyga, C. Yoshikawa, S. Lami, T. L. Geld, Sándor Lökös, J. Yang, J. Snow, M. Tartaglia, Kaushik De, S. M. Chang, S. P. Denisov, Jong-Sung Yu, Y. Fisyak, Quing Zhu, V. M. Podstavkov, M. Fortner, J. Featherly, V. Glebov, Marvin Johnson, M. R. Krishnaswamy, F. Hsieh, L. Magaña-Mendoza, A. R. Clark, A. L. Lyon, F. Borcherding, J. Perkins, A. Para, Peter Nemethy, Sergey Chekulaev, G. Eppley, H. da Motta, N.V. Mokhov, B. May, L. Lueking, B. G. Pope, N. Grossman, A. P. Heinson, J. Borders, Andrew White, J. G.R. Lima, A. S. Ito, A. V. Kozelov, R. E. Hall, J. L. González Solís, Joan A. Guida, I. Adam, J. Z.Y. Jiang, L. T. Goss, P. Grudberg, Y. E. Gutnikov, Stephen Wimpenny, S. Krzywdzinski, V. I. Kochetkov, Hiroaki Aihara, Raymond Brock, Boaz Klima, K. W. Merritt, J. F. Bartlett, Robert Kehoe, E. Oltman, A. Zylberstejn, J. Bendich, Jan M. Guida, M.K. Fatyga, J. Kourlas, H. Greenlee, J. Cochran, D. Nesic, M. Abolins, Elizaveta Shabalina, G. Di Loreto, P. M. Tuts, B. Gobbi, R.E. Avery, Yanwen Liu, P. Mooney, John Hobbs, E. A. Kozlovski, D. Norman, M. R. Adams, Robert Snihur, N. K. Mondal, H. T. Diehl, S. Willis, M. Pang, Young-Sang Yu, N. A. Roe, V. Oguri, M. L. Kelly, D. Denisov, T. Marshall, B. S. Acharya, C. L. Kim, C. Boswell, R. W. Stephens, S. A. Jerger, Sarah Catherine Eno, T.R. McMahon, M. Paterno, M. L. Stevenson, Darien Wood, G.E. Forden, A. Boehnlein, P. M. Sood, D. Pušeljić, Srinivasan Rajagopalan, Thomas Ferbel, G. Wang, Alberto Santoro, D. P. Stoker, P. Yamin, J. Warchol, S. Abachi, E. Flattum, Nicholas John Hadley, J. Ellison, H. Haggerty, P. Padley, H. Johnstad, S. R. Dugad, Jing Li, Matthew Jones, S. Mani, S. Fuess, A. D. Bross, Alexey Volkov, Vyacheslav Klyukhin, P.F. Ermolov, S. Blessing, R. Markeloff, Scott Snyder, Suman Bala Beri, R. Partridge, Howard Gordon, F. Nang, Richard B. Lipton, Ying Li, R. Madden, K. C. Frame, O. Ramirez, P. Rubinov, Cecilia Elena Gerber, Mitchell Wayne, H. Schellman, J. M. Kohli, L. T. Kerth, J. Wilcox, L. Rasmussen, V. S. Burtovoi, Peter W. Draper, S. Fahey, A. Baden, M. Mudan, E. Amidi, J. V.D. Wirjawan, J. R. T. de Mello Neto, G. C. Blazey, A. Leflat, S. Igarashi, P. R. G. Virador, Ulrich Heintz, Stefan Grünendahl, J. Thompson, R. Hernández-Montoya, R. Yamada, S. Feher, R. Astur, M. I. Martin, J. S. Kang, M. A.C. Cummings, R. J. Madaras, B. Hoeneisen, Lee Sawyer, Ting Hu, Q. Z. Li-Demarteau, B. Gómez, S. H. Ahn, Elizabeth Gallas, H. Jostlein, Z. H. Zhu, Jianming Qian, A. L. Spadafora, D. Buchholz, P. I. Goncharov, R. Hatcher, Orin I. Dahl, John Rutherfoord, A. Zieminski, M. Diesburg, P. Tamburello, N. Parua, Randy Ruchti, W. Guryn, D. Owen, Heng Xu, T. Heuring, P. A. Rapidis, A. Bischoff, J. Tarazi, J. A. Wightman, J. F. Glicenstein, A. V. Kostritskiy, Y. M. Park, A. M. Smith, S. Glenn, J. McKinley, D. A. Stoianova, G. Finocchiaro, Tong Hu, Gregory R Snow, Marc M Baarmand, James C. Green, Wagner Carvalho, S. Y. Jun, Sissel Hansen, H. D. Wahl, Gordon Watts, M. Demarteau, V. Sirotenko, S. Banerjee, P. Yepes, T. Joffe-Minor, O. V. Eroshin, H. Johari, V. Balamurali, M. H.G. Souza, C. Yanagisawa, Phillip Gutierrez, K. Bazizi, N. Amos, K. Genser, H. E. Montgomery, H. E. Fisk, T. Fahland, Rajendran Raja, D. Vititoe, A. Jonckheere, G. Guglielmo, J. Solomon, C. S. Mishra, A. P. Vorobiev, Stephan Linn, Gervasio Gomez, R. J. Genik, N. Oshima, E. W. Anderson, Brad Abbott, T. Yasuda, Daria Zieminska, J. F. Lebrat, Vasken Hagopian, H. Weerts, C. Shaffer, D. Cullen-Vidal, A. Goldschmidt, D. Edmunds, E. Neis, N. N. Biswas, B. I. Klochkov, Meenakshi Narain, A. Peryshkin, S. Chopra, Allen Mincer, Andre Sznajder, A. Narayanan, M. D. Peters, W. G. Cobau, M. Sosebee, Hui Li, L. Oesch, J. Alitti, J. Bantly, Andrew Brandt, R. Engelmann, Liu Chen, H.E. Miettinen, J. T. White, D. Hedin, V. A. Bezzubov, J. P. Negret, R. P. Smith, C. Klopfenstein, Harrison Prosper, J. Jaques, P. C. Bhat, F. Lobkowicz, T. Rockwell, Iain Alexander Bertram, J. Womersley, R. L. Dixon, Michael Rijssenbeek, G. Álvarez, V. N. Evdokimov, D. Casey, D.S. Koltick, J. Kotcher, J. T. Linnemann, E. G. Zverev, Brajesh C Choudhary, N. Graf, K. Streets, Vipin Bhatnagar, A. Klatchko, G. Griffin, M. Chung, C. H. Park, H. S. Mao, H. L. Melanson, P. Z. Quintas, S. K. Kim, H. A. Neal, J. H. Christenson, David H. Adams, H. C. Shankar, M. Goforth, and P. Bloom

Subjects
Physics, Particle physics, Physics::Medical Physics, Transverse momentum, General Physics and Astronomy, Production (computer science), Lambda, Coupling (probability), Boson
Abstract

We present results from a search for anomalous $\mathrm{WW}$ and $\mathrm{WZ}$ production in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\phantom{\rule{0ex}{0ex}}\mathrm{TeV}$. We used $p\overline{p}\ensuremath{\rightarrow}e\ensuremath{\nu}\mathrm{jjX}$ events observed during the 1992--1993 run of the Fermilab Tevatron collider, corresponding to an integrated luminosity of $13.7\ifmmode\pm\else\textpm\fi{}0.7{\mathrm{pb}}^{\ensuremath{-}1}$. A fit to the transverse momentum spectrum of the $W$ boson yields direct limits on the CP-conserving anomalous $\mathrm{WW}\ensuremath{\gamma}$ and $\mathrm{WWZ}$ coupling parameters of $\ensuremath{-}0.9l\ensuremath{\Delta}\ensuremath{\kappa}l1.1$ (with $\ensuremath{\lambda}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0$) and $\ensuremath{-}0.6l\ensuremath{\lambda}l0.7$ (with $\ensuremath{\Delta}\ensuremath{\kappa}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0$) at the 95% confidence level, for a form factor scale $\ensuremath{\Lambda}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.5\phantom{\rule{0ex}{0ex}}\mathrm{TeV}$, assuming that the $\mathrm{WW}\ensuremath{\gamma}$ and $\mathrm{WWZ}$ coupling parameters are equal.

Published
1996

16. Measurement of and determination of the decay constant f

Author

Makoto Kobayashi, K Ehara, Kimio Niwa, K. Kodama, J. O. Wilcox, N. Ushida, H. Tajima, K. Okada, M. S. Park, P. M. Yager, James Russ, C. Zhang, B. G. Lundberg, M. Nomura, A. P. Freyberger, George R. Kalbfleisch, B. Baller, P. Skubic, K Suzuki, K Horie, Motoaki Miyanishi, M. Nakamura, S. E. Willis, S. H. Chung, J. Snow, K Teraoka, E. Niu, J. Y. Kim, R. M. Edelstein, H. I. Jang, S. Kuramata, William R. Nichols, T. Okusawa, T. Koya, Ron Lipton, R. J. Stefanski, K. Hoshino, S. Nakanishi, I.Tezuka, Y. Zhang, S Torikai, I. G. Park, S. Watanabe, Michiyuki Chikawa, N Ihara, Kouji Nakamura, G. A. Oleynik, S. Yoshida, Shigeki Aoki, M. Kazuno, K. Reibel, S. G. Frederiksen, V. Paolone, N. R. Stanton, D. B. Gibaut, T. Hara, R. A. Sidwell, Masahiro Komatsu, Tomoko Yoshida, Kazuma Nakazawa, J. S. Song, J. M. Dunlea, J. Yokota, N. Yasuda, D. M. Potter, A. Mokhtarani, Yoshihiro Sato, H. Okabe, N. W. Reay, M. Aryal, S. Ogawa, H. Shibuya, J. T. Volk, and C. S. Yoon

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Yield (chemistry), High Energy Physics::Phenomenology, High Energy Physics::Experiment, Exponential decay
Abstract

We have observed $23.2 \pm 6.0_{-0.9}^{+1.0}$ purely-leptonic decays of $D_s^+ -> \mu^+ \nu_\mu$ from a sample of muonic one prong decay events detected in the emulsion target of Fermilab experiment E653. Using the $D_s^+ -> \phi \mu^+ \nu_\mu$ yield measured previously in this experiment, we obtain $B(D_s^+ --> \mu^+ \nu_\mu) / B(D_s^+ --> \phi \mu^+ \nu_\mu) =0.16 \pm 0.06 \pm 0.03$. In addition, we extract the decay constant $f_{D_s}=194 \pm 35 \pm 20 \pm 14 MeV$.

Published
1996

17. Studies of topological distributions of inclusive three- and four-jet events inp¯pcollisions ats=1800GeV with the D0 detector

Author

T. McKibben, M. V. S. Rao, Y. Pischalnikov, Ulrich Heintz, M. Sosebee, M. Diesburg, D. Owen, J. Tarazi, M. Bhattacharjee, R. Hirosky, J. Alitti, K. S. Hahn, D. Cutts, M. Abolins, R. Snihur, J. Bantly, N. Varelas, P. Mooney, T. L. Taylor, Andrew White, Greg Landsberg, Andrew Brandt, R. Engelmann, Liu Chen, N. K. Mondal, S. A. Jerger, P. Grudberg, T. McMahon, H.E. Miettinen, H. T. Diehl, Y. E. Gutnikov, A. Leflat, S. M. Chang, Heriberto Castilla-Valdez, T. L. Geld, J. M. Hauptman, J. Kourlas, John Hobbs, A. Boehnlein, M. Paterno, Cecilia Elena Gerber, K. Streets, Vipin Bhatnagar, W. G. Cobau, M. I. Martin, J. S. Kang, P. M. Sood, A. Bischoff, C. Shaffer, D. Cullen-Vidal, N. N. Biswas, M. R. Adams, A. V. Kostritskiy, F. Borcherding, J. Ellison, S. Fuess, Young-Sang Yu, N. A. Roe, Sissel Hansen, J. Borders, Pushpalatha C Bhat, M. Mudan, E. Oltman, Dongliang Zhang, Ph. Mangeot, M. Nicola, R. Partridge, E. Flattum, Jianming Qian, R. L. McCarthy, F. Nang, Peter Nemethy, J. M. Guida, D. Pušeljić, G. Eppley, J. Z.Y. Jiang, G. Griffin, J. G.R. Lima, S. Krzywdzinski, L. T. Goss, V. I. Kochetkov, Sarah Catherine Eno, L. Lueking, Dhiman Chakraborty, B. Gibbard, Elizabeth Gallas, H. Jostlein, M. Mohammadi-Baarmand, A. S. Ito, B. Hoeneisen, Lee Sawyer, R. Astur, J. Yu, H. A. Neal, R. Hatcher, J. Featherly, D. Nešić, Vyacheslav Klyukhin, V. A. Bezzubov, J. P. Negret, R. P. Smith, Richard B. Lipton, H. C. Shankar, Ying Li, P. I. Goncharov, V. Glebov, Marvin Johnson, W. Guryn, Matthew Jones, A. Zylberstejn, A. V. Kozelov, M. H.G. Souza, W. M. Smart, S. Youssef, Tong Hu, Haifeng Li, C. H. Park, H. S. Mao, J. Sculli, H. Johari, H. E. Montgomery, V. Balamurali, A. Taketani, S. Glenn, J. McKinley, T. Heuring, Michael Shupe, Hiroaki Aihara, M. Goforth, E. A. Kozlovski, D. L. Adams, A. Baden, Y. Y. Shao, G. C. Blazey, P. M. Tuts, R. Yamada, Robert Kehoe, D. A. Stoianova, Wagner Carvalho, H. Greenlee, C. Cretsinger, Y. M. Park, S. Margulies, J. Balderston, T. Hu, S. H. Ahn, M. Strovink, E. James, S.A. Kahn, T. Joffe-Minor, Meenakshi Narain, A. Peryshkin, C. Yanagisawa, R. W. Stephens, S. Lami, C. T. Murphy, B. G. Pope, S. Lökös, Sharon Hagopian, Orin I. Dahl, John Rutherfoord, A. K.A. Maciel, D. Lincoln, J. Wang, Harrison Prosper, A. Pluquet, P.F. Ermolov, H. E. Fisk, Eunil Won, P. Bloom, Yanxi Zhang, M.K. Fatyga, M. Demarteau, R. E. Avery, F. Wen, E. W. Anderson, A. Bross, J. A. Wightman, Raymond Brock, Boaz Klima, N. I. Bojko, V. S. Burtovoi, G. Finocchiaro, J. Solomon, William A. Wenzel, I. Bertram, D. Vititoe, W. Y. Chen, R. D. Schamberger, R. K. Shivpuri, S. Gao, Gilvan Alves, A. Klatchko, A. Narayanan, Bruno Mansoulie, Elizaveta Shabalina, S. Durston-Johnson, D. Green, James C. Green, H. L. Melanson, P. Z. Quintas, R. J. Genik, A. L. Read, M. L. Stevenson, F. Lobkowicz, George R. Kalbfleisch, B. S. Acharya, C. L. Kim, S. K. Kim, Serban Protopopescu, Paolo Franzini, V. S. Narasimham, Thomas G Trippe, J. Drinkard, D. Norman, J. S. Hoftun, J. N. Butler, T. Rockwell, P. D. Grannis, R. L. Dixon, M. Tartaglia, H. Piekarz, Michael Rijssenbeek, N. Denisenko, D. P. Stoker, Kaushik De, Y. Fisyak, J. H. Christenson, W. X. Gu, A. A. Mayorov, S. Reucroft, Allen Mincer, B. I. Klochkov, D. Edmunds, E. Neis, B. May, B. Baldin, S. Willis, M. Pang, A. Kernan, Y. Ducros, J. B. Singh, A. Jonckheere, C. Yoshikawa, M. K. Fatyga, D. Buchholz, J. T. White, A. P. Vorobiev, Stephan Linn, V. N. Evdokimov, D.S. Koltick, Andre Sznajder, J. T. Linnemann, P. Padley, Alexey Volkov, M. D. Peters, J. Bendich, Victor Daniel Elvira, P. Tamburello, M. D. Marx, Heng Xu, B. Gobbi, H. D. Wahl, James H Cochran, N. Amos, A. N. Galyaev, Mitchell Wayne, H. Schellman, J. M. Kohli, N.V. Mokhov, J. Yang, N. Oshima, G. E. Forden, A. P. Heinson, S. Chopra, J. Thompson, R. J. Madaras, K. Denisenko, M. Chung, L. Oesch, G. Wang, Alberto Santoro, B. Gómez, Z. H. Zhu, Laurent Chevalier, H. Haggerty, Daria Zieminska, D. Hedin, Stephen Wimpenny, M. A. C. Cummings, A. R. Clark, V. M. Podstavkov, H. Johnstad, S. Fahey, W. E. Cooper, R. Demina, Gregory R Snow, T. Marshall, A. L. Lyon, S. H. Aronson, Shuichi Kunori, K. A. Johns, A. Smith, J. F. Lebrat, Daniel R Claes, C. Boswell, T. Yasuda, M. Fortner, J. Perkins, C. Klopfenstein, S. Abachi, Darien Wood, V. Oguri, R. E. Hall, J. L. González Solís, Nicholas John Hadley, Suman Bala Beri, G. Álvarez, S. Blessing, Scott Snyder, L. T. Kerth, J. Jaques, T. Huehn, R. Markeloff, I. V. Mandrichenko, D. Fein, Erich Varnes, J. Kotcher, J. Womersley, J. M. De Miranda, J. Warchol, R. Hernández-Montoya, A. Milder, C. Murphy, N. Grossman, Jing Li, S. Feher, N. Graf, P. Yamin, Brajesh C Choudhary, S. Mani, E. Amidi, J. V.D. Wirjawan, J. R. T. de Mello Neto, R. Madden, L. Rasmussen, Peter W. Draper, D. Stewart, S. N. Gurzhiev, Quing Zhu, S. Rusin, L. Markosky, G. Di Loreto, D. Denisov, J. Teiger, Srinivasan Rajagopalan, Thomas Ferbel, N. Parua, Ting Hu, S. Igarashi, P. R. G. Virador, A. Zieminski, Q. Z. Li-Demarteau, P. A. Rapidis, Randy Ruchti, S. Y. Jun, A. Goldschmidt, T. Fahland, V. Sirotenko, O. V. Eroshin, Phillip Gutierrez, J. Wilcox, J. A. Guida, D. Casey, K. Genser, Rajendran Raja, S. C. Loken, Brad Abbott, Welathantri Gd Dharmaratna, C. S. Mishra, G. Guglielmo, Vasken Hagopian, H. Weerts, S. P. Denisov, M. R. Krishnaswamy, F. Hsieh, S. Grünendahl, A. Para, Sergey Chekulaev, I. Adam, P. Rubinov, K. W. Merritt, A. L. Spadafora, J. F. Bartlett, Yanwen Liu, K. Bazizi, S. R. Dugad, M. L. Kelly, Howard Gordon, K. C. Frame, O. Ramirez, and C. K. Jung

Subjects
Quantum chromodynamics, Physics, Quark, Nuclear and High Energy Physics, High Energy Physics::Phenomenology, Monte Carlo method, Tevatron, Jet (particle physics), Topology, law.invention, law, High Energy Physics::Experiment, Fermilab, Collider, Energy (signal processing)
Abstract

The global topologies of inclusive three- and four-jet events produced in $\overline{p}p$ interactions are described. The three- and four-jet events are selected from data recorded by the D0 detector at the Fermilab Tevatron Collider operating at a center-of-mass energy of $\sqrt{s}=1800$ GeV. The measured, normalized distributions of various topological variables are compared with parton-level predictions of tree-level QCD calculations. The parton-level QCD calculations are found to be in good agreement with the data. The studies also show that the topological distributions of the different subprocesses involving different numbers of quarks are very similar and reproduce the measured distributions well. The parton-shower Monte Carlo generators provide a less satisfactory description of the topologies of the three- and four-jet events.

Published
1996

18. Search forW̃1Z̃2Production via Trilepton Final States inpp¯Collisions ats=1.8TeV

Author

D. Buchholz, M. Marx, P. Tamburello, T. Huehn, Heng Xu, A. Baden, R. K. Shivpuri, J. A. Wightman, A. M. Smith, G. C. Blazey, N. Grossman, D. R. Claes, R. Yamada, P. Bloom, D. Fein, Gregory R Snow, D. Chakraborty, C. Cretsinger, J. Drinkard, M. Strovink, E. James, M. Bhattacharjee, S. H. Ahn, M. Tartaglia, N. Amos, K. Genser, N. I. Bojko, Orin I. Dahl, John Rutherfoord, J. Borders, S. Margulies, C. Shaffer, D. Cullen-Vidal, A. Goldschmidt, Rajendran Raja, C. Murphy, P.F. Ermolov, Kaushik De, J. Jaques, G. Eppley, E. Amidi, Matthew Jones, J. V.D. Wirjawan, N. N. Biswas, Dongliang Zhang, J. Z.Y. Jiang, J. R. T. de Mello Neto, Don Lincoln, D. Edmunds, E. Neis, L. T. Goss, S. Chopra, C. T. Murphy, S. M. Chang, Robert Hirosky, A. Bischoff, Erich Varnes, J. F. Glicenstein, A. V. Kostritskiy, Sissel Hansen, Brad Abbott, J. M. De Miranda, V. S. Burtovoi, R. Astur, M. Abolins, R. J. Madaras, D. Pušeljić, E. Flattum, Raymond Brock, H. da Motta, G. Finocchiaro, J. G.R. Lima, James C. Green, K. S. Hahn, D. Cutts, S. Protopopescu, E. A. Kozlovski, Greg Landsberg, S. Lami, T. L. Geld, J. Womersley, Boaz Klima, S. Igarashi, P. R. G. Virador, Q. Z. Li-Demarteau, D. Nesic, A. S. Ito, Stephen Wimpenny, Andre Sznajder, R. Demina, W. Y. Chen, W. G. Cobau, Ulrich Heintz, J. T. White, H. D. Wahl, M. H.G. Souza, P. Mooney, Gilvan Alves, J. Cochran, M. Sosebee, S. Fahey, V. Oguri, M. A. Shupe, F. Borcherding, T. Marshall, M. D. Peters, H. E. Montgomery, K. Bazizi, D. Norman, Hui Li, S. A. Jerger, N. Parua, Randy Ruchti, C. Klopfenstein, T.R. McMahon, M. Paterno, M. L. Stevenson, Darien Wood, Cecilia Elena Gerber, M. Diesburg, S. Durston-Johnson, E. Oltman, Sándor Lökös, Nicholas John Hadley, George R. Kalbfleisch, D. Owen, S. Willis, M. Pang, J. Yang, J. Alitti, G. Guglielmo, J. Warchol, S. Blessing, Paolo Franzini, J. Tarazi, J. Bantly, Jing Li, N. Denisenko, Sarah Catherine Eno, H. L. Melanson, P. Z. Quintas, J. M. Hauptman, Scott Snyder, J. S. Hoftun, J. N. Butler, B. May, S. Reucroft, V. S. Narasimham, V. M. Podstavkov, L. Oesch, N. K. Mondal, Elizabeth Gallas, L. A. Markosky, H. Jostlein, Vyacheslav Klyukhin, W. X. Gu, H. T. Diehl, A. N. Galyaev, R. Hatcher, M. Fortner, C. Yoshikawa, F. Nang, M. Nicola, P. D. Grannis, H. Piekarz, Richard B. Lipton, Ying Li, S. Krzywdzinski, T. Yasuda, B. Gobbi, J. Perkins, S. K. Kim, Yu. Pischalnikov, V. I. Kochetkov, T. L. Taylor, F. Wen, E. W. Anderson, Andrew White, W. M. Smart, A. A. Mayorov, Jianming Qian, J. Wilcox, V. Sirotenko, K. Denisenko, J. H. Christenson, D. Stewart, Brajesh C Choudhary, M. Demarteau, A. Zylberstejn, Sebastien Jonathan Kahn, S. N. Gurzhiev, A. Boehnlein, O. V. Eroshin, Jan M. Guida, P. M. Sood, David H. Adams, B. Gibbard, M. K. Fatyga, T. G. Trippe, G.E. Forden, Phillip Gutierrez, H. Greenlee, Andrew Brandt, R. Engelmann, H. Johnstad, S. Feher, Heriberto Castilla-Valdez, P. Grudberg, Y. E. Gutnikov, Liu Chen, T. Fahland, W. E. Cooper, A. D. Bross, T. Heuring, R. D. Schamberger, S. C. Loken, Ting Hu, J. Kourlas, J. Sculli, R.E. Avery, Sharon Hagopian, H.E. Miettinen, S. Glenn, J. McKinley, A. Zieminski, Peter Nemethy, J. Ellison, Nikos Varelas, T. Hu, A. K.A. Maciel, D. A. Stoianova, Wagner Carvalho, Allen Mincer, John Hobbs, Quing Zhu, L. Lueking, C. S. Mishra, A. Klatchko, P. A. Rapidis, M. R. Adams, Young-Sang Yu, S. Fuess, M. Mohammadi-Baarmand, S. H. Aronson, Shuichi Kunori, K. A. Johns, P. Padley, N. A. Roe, S. Rusin, B. Baldin, N.V. Mokhov, Vasken Hagopian, Jong-Sung Yu, Alexey Volkov, M. Chung, S. Y. Jun, Alexander Lincoln Read, D. Vititoe, Joan A. Guida, R. Hernández-Montoya, R. J. Genik, A. P. Heinson, H. Weerts, Mitchell Wayne, H. Schellman, J. M. Kohli, Stefan Grünendahl, J. Thompson, G. Di Loreto, R. E. Hall, J. L. González Solís, Hiroaki Aihara, B. Gómez, Z. H. Zhu, Y. Ducros, D. Denisov, C. Boswell, S. Abachi, P. M. Tuts, Meenakshi Narain, Srinivasan Rajagopalan, Thomas Ferbel, A. Peryshkin, R. Partridge, Suman Bala Beri, H. A. Neal, H. C. Shankar, A. Narayanan, M. Goforth, J. B. Singh, Tong Hu, A. L. Spadafora, M.K. Fatyga, P. I. Goncharov, W. Guryn, B. S. Acharya, C. L. Kim, G. Álvarez, D. Hedin, Victor Daniel Elvira, D. Casey, S. Youssef, Robert J. McCarthy, J. Kotcher, D.R. Green, J. Balderston, T. Joffe-Minor, P. C. Bhat, F. Lobkowicz, C. Yanagisawa, Eunil Won, N. Graf, H. E. Fisk, T. Rockwell, Iain Alexander Bertram, R. L. Dixon, K. Streets, Vipin Bhatnagar, Michael Rijssenbeek, J. Solomon, G. Griffin, V. N. Evdokimov, D.S. Koltick, J. T. Linnemann, B. I. Klochkov, C. K. Jung, V. A. Bezzubov, T. McKibben, M. V. S. Rao, J. P. Negret, R. P. Smith, C. H. Park, H. S. Mao, Y. Y. Shao, Harrison Prosper, J. Bendich, B. G. Pope, G. Wang, Alberto Santoro, H. Haggerty, Y. Fisyak, J. Featherly, V. Glebov, Marvin Johnson, A. L. Lyon, A. V. Kozelov, P. Rubinov, R. W. Stephens, D. P. Stoker, M. Mudan, Elizaveta Shabalina, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, A. Taketani, Y. M. Park, A. Leflat, M. I. Martin, J. S. Kang, P. Yamin, H. Johari, V. Balamurali, S. Mani, R. Madden, L. Rasmussen, Peter W. Draper, A. Kernan, A. Jonckheere, A. P. Vorobiev, Stephan Linn, N. Oshima, Daria Zieminska, J. F. Lebrat, I. Adam, K. W. Merritt, J. F. Bartlett, Robert Kehoe, Yanwen Liu, Robert Snihur, M. L. Kelly, S. R. Dugad, R. Markeloff, Howard Gordon, K. C. Frame, O. Ramirez, L. T. Kerth, S. P. Denisov, M. R. Krishnaswamy, F. Hsieh, A. R. Clark, A. Para, and Sergey Chekulaev

Subjects
Physics, Particle physics, Pair production, Chargino, Luminosity (scattering theory), law, Neutralino, Tevatron, General Physics and Astronomy, Fermilab, Collider, law.invention, Minimal Supersymmetric Standard Model
Abstract

We have searched for associated production of the lightest chargino W 1 and next-to-lightest neutralino Z 2 of the minimal supersymmetric standard model in pp collisions at √s=1.8 TeV using the D0 detector at the Fermilab Tevatron collider. Data corresponding to an integrated luminosity of 12.5±0.7pb -1 were examined for events containing three isolated leptons. No evidence for W 1 Z 2 pair production was found. Limits on s(W 1 Z 2 )B(W 1 →lνZ 1 )B(Z 2 →llZ 1 ) are presented.

Published
1996

19. Search for Light Top Squarks inpp¯Collisions at√s=1.8TeV

Author

G. Finocchiaro, M. Abolins, S. Durston-Johnson, P. Mooney, M. Nicola, R. Snihur, N. Varelas, N. Denisenko, S. Reucroft, F. Borcherding, S. M. Chang, N. K. Mondal, H. T. Diehl, A. Boehnlein, Andrew White, P. M. Sood, M. Mohammadi-Baarmand, J. Ellison, A. Goldschmidt, C. Yoshikawa, R. L. McCarthy, J. Bendich, J. Yu, E. Oltman, C. K. Jung, P. Grudberg, Matthew Jones, D. Nešić, Haifeng Li, P. Yamin, C. L. Kim, T. McMahon, Y. E. Gutnikov, C. Klopfenstein, Hiroaki Aihara, J. Kourlas, P. I. Goncharov, W. Guryn, T. McKibben, M. V. S. Rao, D. Buchholz, S. Mani, G. Wang, P. M. Tuts, Alberto Santoro, Sarah Catherine Eno, Meenakshi Narain, Peter Nemethy, T. Fahland, R. W. Stephens, A. Peryshkin, P. Bloom, J. A. Wightman, R. J. Madaras, R. Madden, S. Krzywdzinski, Seong Keun Kim, P. Tamburello, L. Rasmussen, Peter W. Draper, John Hobbs, N. I. Bojko, Alexander Vorobiev, Heng Xu, G. Eppley, V. D. Elvira, Vyacheslav Klyukhin, W. Y. Chen, George R. Kalbfleisch, V. I. Kochetkov, Raymond Brock, Boaz Klima, C. Shaffer, J. Wilcox, A. Narayanan, D. Cullen-Vidal, Paolo Franzini, K. Genser, K. Denisenko, Bobby Samir Acharya, H. A. Neal, H. C. Shankar, A. L. Read, Pushpalatha C Bhat, M. Mudan, B. May, Young-Sang Yu, D. Casey, V. S. Narasimham, Thomas G Trippe, W. X. Gu, M. Bhattacharjee, Ying Li, A. Baden, B. Hoeneisen, N. N. Biswas, Lee Sawyer, H. da Motta, J. G.R. Lima, D. Hedin, T. Joffe-Minor, J. Yang, D. Norman, A. A. Mayorov, M. Goforth, M. K. Fatyga, M. L. Stevenson, H. L. Melanson, P. Z. Quintas, A. Zylberstejn, G. C. Blazey, J. Featherly, A. L. Lyon, Shuichi Kunori, A. S. Ito, A. Taketani, C. Yanagisawa, S. P. Denisov, H. E. Fisk, D. Pušeljić, V. Oguri, R. Hirosky, R. Hernández-Montoya, S. Willis, M. Pang, M. Sosebee, V. Glebov, Marvin Johnson, R. Yamada, Gregory R Snow, V. M. Podstavkov, Rajendran Raja, D. Edmunds, Y. Fisyak, I. Bertram, Y. M. Park, M. Fortner, C. Murphy, S.A. Kahn, J. Solomon, A. V. Kozelov, E. Neis, S. H. Ahn, J. S. Hoftun, J. N. Butler, P. D. Grannis, H. Greenlee, J. H. Christenson, B. Gobbi, M. R. Krishnaswamy, F. Lobkowicz, S. C. Loken, J. Alitti, J. Bantly, S. Margulies, M. Demarteau, R. E. Avery, H. Piekarz, A. Klatchko, Brad Abbott, Orin I. Dahl, John Rutherfoord, J. Perkins, A. N. Galyaev, J. Warchol, S. Lami, D. Stocker, Andre Sznajder, F. Hsieh, T. Rockwell, R. L. Dixon, S. A. Jerger, T. L. Taylor, A. Leflat, P.F. Ermolov, B. I. Klochkov, C. Cretsinger, Michael Rijssenbeek, M. D. Marx, A. Bross, Mary Beth Adams, Jasvinder A. Singh, J. M. Hauptman, M. Strovink, H. D. Wahl, E. James, S. Grünendahl, N. A. Roe, S. Chopra, S. Youssef, Andrew Brandt, Ting Hu, M. D. Peters, M. Chung, H. Johnstad, V. N. Evdokimov, T. Yasuda, W. G. Cobau, M. I. Martin, J. S. Kang, Jianming Qian, Heriberto Castilla-Valdez, A. Para, V. S. Burtovoi, Sergey Chekulaev, W. E. Cooper, Gilvan Alves, G. Álvarez, E. Amidi, Serban Protopopescu, J. V.D. Wirjawan, D.S. Koltick, J. R. T. de Mello Neto, J. T. Linnemann, James C. Green, K. S. Hahn, R. Engelmann, Liu Chen, H.E. Miettinen, D. Cutts, A. Zieminski, Tong Hu, Daniel R Claes, V. A. Bezzubov, J. P. Negret, J. Kotcher, P. A. Rapidis, Robert Kehoe, A. Kernan, T. Huehn, Y. Pischalnikov, Ulrich Heintz, Greg Landsberg, H. Jöstlein, A. Jonckheere, R. P. Smith, Elizabeth Gallas, Allan G Clark, D. Fein, T. L. Geld, R. Hatcher, L. Oesch, M. Diesburg, Michael Shupe, L. T. Kerth, J. Balderston, R. Astur, N. Graf, J. Jaques, D. Owen, M. Paterno, T. Heuring, Stephan Linn, Y. Y. Shao, M.K. Fatyga, H. Johari, V. Balamurali, N. Oshima, K. Streets, Vipin Bhatnagar, Ron Lipton, J. Womersley, J. Tarazi, Harrison Prosper, R. Partridge, E. Flattum, G. Griffin, Erich Varnes, W. Smart, K. A. Johns, B. G. Pope, Nikolai Mokhov, S. Feher, Daria Zieminska, R. D. Schamberger, A. Smith, J. F. Lebrat, J. M. De Miranda, D. Lincoln, D. Stewart, S. N. Gurzhiev, C. H. Park, Eunil Won, H. S. Mao, S. Y. Jun, D. L. Adams, Brajesh C Choudhary, Elizaveta Shabalina, B. Baldin, M. H.G. Souza, Y. Ducros, H. E. Montgomery, M. L. Kelly, J. T. White, Howard Gordon, N. Grossman, C. Boswell, N. Amos, J. Borders, K. C. Frame, O. Ramirez, Dongliang Zhang, S. Abachi, Jing Li, J. Z.Y. Jiang, I. Adam, P. Rubinov, K. W. Merritt, L. T. Goss, A. L. Spadafora, J. F. Bartlett, Suman Bala Beri, Yanwen Liu, C. S. Mishra, L. Lueking, E. A. Kozlovski, G. Guglielmo, K. Bazizi, G. E. Forden, A. P. Heinson, H. Haggerty, S. Lökös, Quing Zhu, Vasken Hagopian, H. Weerts, R. E. Hall, J. L. González Solís, C. E. Gerber, S. Fuess, S. Glenn, J. McKinley, D. A. Stoianova, Wagner Carvalho, D. Vititoe, R. J. Genik, V. Sirotenko, S. Fahey, O. V. Eroshin, Phillip Gutierrez, S. Rusin, L. Markosky, Joan A. Guida, N. Parua, G. Di Loreto, D. Denisov, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, S. Igarashi, P. R. G. Virador, Q. Z. Li-Demarteau, Randy Ruchti, A. Bischoff, J. F. Glicenstein, A. V. Kostritskiy, Sissel Hansen, F. Nang, J. M. Guida, Dhiman Chakraborty, Sharon Hagopian, A. K.A. Maciel, F. Wen, E. W. Anderson, Allen Mincer, P. Padley, Alexey Volkov, James H Cochran, Mitchell Wayne, H. Schellman, J. M. Kohli, B. Gibbard, J. Thompson, B. Gómez, Z. H. Zhu, J. Sculli, Shashikant Dugad, T. Hu, R. Demina, Stephen Wimpenny, M. A. C. Cummings, T. Marshall, Darien Wood, Nicholas John Hadley, S. Blessing, Scott Snyder, R. Markeloff, R. K. Shivpuri, J. Drinkard, M. Tartaglia, Kaushik De, S. H. Aronson, and C. T. Murphy

Subjects
Physics, Particle physics, Top quark, Branching fraction, High Energy Physics::Phenomenology, Tevatron, General Physics and Astronomy, law.invention, Charm quark, Standard Model, Nuclear physics, law, Neutralino, High Energy Physics::Experiment, Fermilab, Collider
Abstract

We present a search for pair produced top squarks, the supersymmetric partners of the top quark, using the D0 detector at the Fermilab Tevatron pp collider. We consider a scenario in which the lighter of the two top squarks t 1 decays with 100% branching fraction to a charm quark and the lightest neutralino χ 1 0 yielding a signal of two acollinear jets with missing transverse energy. We observe 3 events while we expect 3.5±1.2 events from the known standard model processes. We exclude at the 95% confidence level a significant region of the m t 1 - m χ 1 0 parameter space. The highest m t 1 value we exclude is 93 GeV/c 2 with a corresponding m χ 1 0 value of 8 GeV/c 2 .

Published
1996

20. production in p collisions at = 1.8

Author

T. Fahland, J. Wilcox, D. Casey, H. Tong, Rajendran Raja, S. Margulies, Brad Abbott, J. Jaques, K. S. Hahn, D. Cutts, A. Zieminski, P.F. Ermolov, J. M. Hauptman, Greg Landsberg, S. Y. Jun, A. N. Galyaev, F. Wen, E. W. Anderson, M. Sosebee, M. Nicola, Ron Lipton, J. Womersley, B. Baldin, Y. Ducros, S. C. Loken, V. S. Burtovoi, M. Bhattacharjee, T. L. Geld, Natalie A. Roe, C. T. Murphy, M. Paterno, C. Shaffer, D. Cullen-Vidal, K. Genser, A. Goldschmidt, S. Lami, Allen Mincer, T. G. Trippe, Nikolai Mokhov, B. May, W. E. Cooper, L. P. Chen, A. Baden, S. Fuess, Daniel R Claes, Jianming Qian, J. Alitti, J. Bantly, R. Hirosky, G. C. Blazey, W. Y. Chen, S. Krzywdzinski, T. McKibben, M. V. S. Rao, N. N. Biswas, B. Gibbard, R. L. McCarthy, S. Feher, Andrew White, S. Glenn, J. McKinley, D. A. Stoianova, R. Yamada, I. Bertram, Sharon Hagopian, George R. Kalbfleisch, J. Bendich, Paolo Franzini, J. Featherly, V. S. Narasimham, V. Glebov, Alexander Vorobiev, G. Finocchiaro, S. H. Ahn, Wagner Carvalho, A. Bischoff, J. Sculli, J. F. Glicenstein, A. V. Kostritskiy, R. J. Madaras, T. McMahon, Y. E. Gutnikov, T. L. Taylor, A. K.A. Maciel, F. Lobkowicz, S. Chopra, John Rutherfoord, Brajesh C Choudhary, J. Kourlas, E. Oltman, Sissel Hansen, A. A. Mayorov, P. A. Rapidis, Heriberto Castilla-Valdez, Marvin Johnson, M. K. Fatyga, A. V. Kozelov, F. Nang, V. I. Kochetkov, Andrew Brandt, R. Engelmann, Mary Beth Adams, N. Amos, John Hobbs, J. Borders, Bobby Samir Acharya, H.E. Miettinen, P. Bloom, J. A. Wightman, S. Durston-Johnson, M. H.G. Souza, H. A. Neal, Young-Sang Yu, H. C. Shankar, B. Gobbi, J. T. Linnemann, A. Jonckheere, C. Klopfenstein, T. Rockwell, J. Drinkard, Raymond Brock, Boaz Klima, N. I. Bojko, Peter Nemethy, Dongliang Zhang, D. Vititoe, H. E. Montgomery, James C. Green, M. Tartaglia, Stephan Linn, N. Denisenko, A. Zylberstejn, J. Z.Y. Jiang, G. Eppley, M. Goforth, Y. Pischalnikov, Ulrich Heintz, W. X. Gu, D. Norman, Kaushik De, M. Mohammadi-Baarmand, S. Reucroft, R. L. Dixon, Michael Rijssenbeek, Jasvinder A. Singh, F. Borcherding, Gordon Watts, H. Jöstlein, J. Yu, S. Willis, M. Pang, R. J. Genik, C. Cretsinger, H. da Motta, J. G.R. Lima, S. H. Aronson, V. Sirotenko, N. Oshima, M. Strovink, D. P. Stoker, E. G. Zverev, H. Greenlee, T. Joffe-Minor, L. T. Goss, R. Snihur, N. Varelas, H. Johnstad, P. Padley, Alexey Volkov, Daria Zieminska, E. James, M. Diesburg, R. D. Schamberger, D. Buchholz, D. Nešić, H. Tao, James H Cochran, C. Yanagisawa, A. S. Ito, A. Klatchko, O. V. Eroshin, C. L. Kim, Hiroaki Aihara, Mitchell Wayne, H. Schellman, J. M. Kohli, S. M. Chang, A. Smith, Stephen Wimpenny, Haifeng Li, J. F. Lebrat, C. Boswell, H. E. Fisk, P. Tamburello, Heng Xu, J. S. Hoftun, J. N. Butler, P. D. Grannis, P. M. Tuts, D. Owen, T. Marshall, H. Ting, A. Bross, Phillip Gutierrez, E. A. Kozlovski, H. Piekarz, R. W. Stephens, Darien Wood, Sarah Catherine Eno, C. Murphy, Meenakshi Narain, Gilvan Alves, A. Peryshkin, R. Astur, Pushpalatha C Bhat, M. Mudan, Gregory R Snow, J. Tarazi, V. N. Evdokimov, V. D. Elvira, T. Heuring, S. Abachi, H. Haggerty, J. Thompson, B. Gómez, Z. H. Zhu, D.S. Koltick, Nicholas John Hadley, Shashikant Dugad, S. A. Jerger, R. Hernández-Montoya, C. Yoshikawa, T. Yasuda, S. Lökös, Serban Protopopescu, S. Blessing, A. Leflat, K. Denisenko, Scott Snyder, S. Youssef, R. Markeloff, A. Narayanan, M. Chung, Vyacheslav Klyukhin, Dhiman Chakraborty, Robert Kehoe, M. A.C. Cummings, B. Hoeneisen, J. Yang, R. Demina, Suman Bala Beri, A. L. Lyon, Shuichi Kunori, Ying Li, J. Balderston, Lee Sawyer, N. Parua, B. I. Klochkov, G. E. Forden, A. P. Heinson, H. S. Mao, R. E. Hall, J. L. González Solís, V. M. Podstavkov, M. Fortner, J. Perkins, J. M. Guida, M. D. Marx, H. D. Wahl, Matthew Jones, S. Igarashi, Q. Z. Li-Demarteau, D. Lincoln, Eunil Won, A. L. Read, D. Edmunds, E. Neis, Andre Sznajder, G. Wang, Alberto Santoro, Seong Keun Kim, A. Taketani, Y. M. Park, S.A. Kahn, M. Demarteau, R. E. Avery, M. D. Peters, W. G. Cobau, M. I. Martin, J. S. Kang, L. Oesch, P. Yamin, J. Solomon, S. Mani, T. Huehn, H. Johari, D. Hedin, V. Balamurali, B. G. Pope, D. Fein, Erich Varnes, R. Madden, J. M. De Miranda, L. Rasmussen, Randy Ruchti, Elizaveta Shabalina, Peter W. Draper, N. Grossman, V. A. Bezzubov, J. P. Negret, J. T. White, Jing Li, R. P. Smith, C. S. Mishra, Michael Shupe, Y. Y. Shao, G. Guglielmo, M.K. Fatyga, Harrison Prosper, L. Markosky, Joan A. Guida, G. Di Loreto, D. Denisov, G. Álvarez, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, J. Kotcher, O. I. Dahl, N. Graf, H. L. Melanson, P. Z. Quintas, D. Stewart, S. N. Gurzhiev, Y. Fisyak, J. H. Christenson, K. Streets, Vipin Bhatnagar, R. Partridge, E. Flattum, Quing Zhu, I. Adam, P. Rubinov, K. W. Merritt, G. Griffin, J. F. Bartlett, C. H. Park, Yanwen Liu, D. L. Adams, L. Lueking, S. Fahey, K. Bazizi, M. L. Kelly, Howard Gordon, K. C. Frame, O. Ramirez, L. T. Kerth, S. P. Denisov, P. Grudberg, V. Oguri, M. L. Stevenson, M. R. Krishnaswamy, F. Hsieh, A. R. Clark, S. Grünendahl, J. Warchol, A. Para, Sergey Chekulaev, C. K. Jung, E. Amidi, J. V.D. Wirjawan, J. R. T. de Mello Neto, M. Abolins, P. Mooney, Elizabeth Gallas, N. K. Mondal, H. T. Diehl, R. Hatcher, A. Boehnlein, P. M. Sood, J. Ellison, A. L. Spadafora, P. I. Goncharov, W. Guryn, R. K. Shivpuri, D. Pušeljić, W. Smart, K. A. Johns, Vasken Hagopian, H. Weerts, C. E. Gerber, and P. R.G. Virador

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Tevatron, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear physics, Transverse momentum, High Energy Physics::Experiment, Production (computer science), B meson, Impact parameter, Nuclear Experiment
Abstract

We have studied J ψ production in p p collisions at s = 1.8 TeV with the DO detector at Fermilab using μ+μ− data. We have measured the inclusive J ψ production cross section as a function of J ψ transverse momentum, pT. For the kinematic range pT > 8 GeV/c and |η| σ(p p → J ψ + X) · Br ( J ψ → μ + μ − ) = 2.08 ± 0.17( stat) ± 0.46(syst) nb. Using the muon impact parameter we have estimated the fraction of J ψ mesons coming from B meson decays to be fb = 0.35 ± 0.09(stat)±0.10(syst) and inferred the inclusive b production cross section. From the information on the event topology the fraction of nonisolated J ψ events has been measured to be fnonisol = 0.64 ± 0.08(stat)±0.06(syst). We have also obtained the fraction of J ψ events resulting from radiative decays of χc states, fχ = 0.32 ± 0.07(stat)±0.07(syst). We discuss the implications of our measurements for charmonium production processes.

Published
1996

21. Double-sided silicon charge correlation study: matching multiple track hits

Author

George R. Kalbfleisch and Eric H. Smith

Subjects
Physics, Nuclear and High Energy Physics, Matching (statistics), Physics::Instrumentation and Detectors, business.industry, Track (disk drive), Detector, Charge (physics), Optics, Signal-to-noise ratio, business, Instrumentation, Beam (structure), SIMPLE algorithm, Test data
Abstract

Double-sided microstripe silicon detectors with analog charge readout offer the possibility of correlating the hits seen on the two sides by matching the cluster charges, providing the signal to noise ratio is sufficiently high. We make a study of this matching from actual beam test data of tracks incident upon two Micron DC-coupled microstripe detectors. A simple algorithm, or simple cuts, are used to match the double-sided charges. Results as a function of the number of simultaneous tracks incident and of the signal to noise (from 15:1 to 30:1) are given. We find that charge correlations should be helpful in reducing the N 2 combinatorics usually operative in track finding, matching and fitting.

Published
1996

22. Jet Production via Strongly Interacting Color-Singlet Exchange inpp¯Collisions

Author

S. Glenn, J. McKinley, D. A. Stoianova, Wagner Carvalho, D. Vititoe, R. J. Genik, A. L. Read, C. Boswell, D. Edmunds, S. Abachi, E. Neis, Suman Bala Beri, Andre Sznajder, M. D. Peters, L. Oesch, T. Joffe-Minor, C. Yanagisawa, H. E. Fisk, C. Klopfenstein, J. Solomon, B. I. Klochkov, J. M. Hauptman, Cecilia Elena Gerber, Jianming Qian, Tong Hu, I. V. Mandrichenko, P. A. Rapidis, C. Shaffer, D. Cullen-Vidal, K. Genser, A. Bischoff, A. V. Kostritskiy, J. Bendich, A. Kernan, A. Jonckheere, Sissel Hansen, C. K. Jung, V. Oguri, R. Hernández-Montoya, Stephan Linn, A. Milder, N. N. Biswas, F. Nang, C. S. Mishra, G. Wang, Alberto Santoro, C. Murphy, N. Oshima, G. Guglielmo, Daria Zieminska, Sharon Hagopian, W. Y. Chen, R. D. Schamberger, A. Smith, J. F. Lebrat, S. Protopopescu, A. K.A. Maciel, Vasken Hagopian, H. Weerts, George R. Kalbfleisch, P. Padley, D. Casey, Alexey Volkov, James H Cochran, Paolo Franzini, P. I. Goncharov, V. S. Narasimham, Thomas G Trippe, W. X. Gu, R. K. Shivpuri, S. Krzywdzinski, W. Guryn, Mitchell Wayne, H. Schellman, J. M. Kohli, J. Thompson, P. Yamin, A. A. Mayorov, V. I. Kochetkov, S. Fuess, R. Snihur, B. Gómez, Z. H. Zhu, M. Abolins, Shashikant Dugad, N. Varelas, M. K. Fatyga, S. Mani, J. Drinkard, Rajendran Raja, M. Tartaglia, P. Mooney, M. Nicola, A. Zylberstejn, H. Greenlee, R. Demina, S. M. Chang, R. Madden, S. C. Loken, E. Amidi, N. K. Mondal, H. T. Diehl, L. Rasmussen, Peter W. Draper, A. Boehnlein, P. M. Sood, Sun Kee Kim, Brad Abbott, A. Bross, M. Bhattacharjee, V. Sirotenko, Kaushik De, Pushpalatha C Bhat, M. Mudan, J. V.D. Wirjawan, J. R. T. de Mello Neto, J. Ellison, F. Wen, E. W. Anderson, B. May, O. V. Eroshin, Phillip Gutierrez, J. Yu, R. L. McCarthy, B. Hoeneisen, Lee Sawyer, Allan G Clark, S. H. Aronson, P. Bloom, J. A. Wightman, S. Fahey, R. Hirosky, Matthew Jones, Allen Mincer, A. Taketani, N. Parua, Ting Hu, T. Huehn, B. Gobbi, N. I. Bojko, J. M. Guida, M.K. Fatyga, C. L. Kim, D. Fein, Y. M. Park, Dhiman Chakraborty, S.A. Kahn, Hiroaki Aihara, Elizabeth Gallas, R. Hatcher, H. L. Melanson, P. Z. Quintas, A. Zieminski, K. S. Hahn, M. Demarteau, R. E. Avery, D. Cutts, J. S. Kang, Erich Varnes, P. M. Tuts, R. W. Stephens, Greg Landsberg, Peter Nemethy, G. Eppley, J. M. De Miranda, S. Rusin, Y. Fisyak, J. H. Christenson, B. Gibbard, T. L. Taylor, V. A. Bezzubov, L. T. Kerth, S. Igarashi, T. L. Geld, J. P. Negret, R. P. Smith, M. L. Stevenson, L. Markosky, Joan A. Guida, Soon Yung Jun, N. Grossman, J. G.R. Lima, J. Sculli, Michael Shupe, M. Paterno, Jasvinder A. Singh, Y. Pischalnikov, Ulrich Heintz, G. Di Loreto, H. Jöstlein, P. R. G. Virador, Q. Z. Li-Demarteau, Y. Y. Shao, T. Hu, F. Borcherding, A. S. Ito, A. Goldschmidt, W. Smart, K. A. Johns, J. S. Hoftun, J. N. Butler, M. Diesburg, H. Johnstad, Laurent Chevalier, K. Streets, Vipin Bhatnagar, M. H.G. Souza, D. Owen, Stephen Wimpenny, M. A. C. Cummings, E. Oltman, T. Yasuda, R. Partridge, Harrison Prosper, D. Denisov, T. McKibben, J. Teiger, Randy Ruchti, E. Flattum, P. D. Grannis, H. Piekarz, J. Tarazi, Heriberto Castilla-Valdez, T. Marshall, G. Griffin, H. E. Montgomery, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, M. V. S. Rao, Sarah Catherine Eno, G. E. Forden, A. P. Heinson, Darien Wood, C. H. Park, Nicholas John Hadley, H. S. Mao, Vyacheslav Klyukhin, D. L. Adams, Alexander Vorobiev, Ying Li, S. Blessing, Scott Snyder, R. Markeloff, N. Amos, R. E. Hall, D. Stewart, S. N. Gurzhiev, J. L. González Solís, A. Baden, G. C. Blazey, D. P. Stoker, R. Astur, M. D. Marx, R. J. Madaras, S. Margulies, T. Fahland, R. Yamada, J. Li, S. Lami, S. H. Ahn, A. Pluquet, H. D. Wahl, P.F. Ermolov, J. Wilcox, T. Heuring, Orin I. Dahl, John Rutherfoord, G. Álvarez, B. Baldin, Mary Beth Adams, D. Hedin, V. S. Burtovoi, Quing Zhu, Y. Ducros, J. Kotcher, I. Bertram, James C. Green, N. Graf, Bruno Mansoulie, F. Lobkowicz, T. Rockwell, R. L. Dixon, Michael Rijssenbeek, D. Buchholz, P. Tamburello, V. N. Evdokimov, J. Warchol, D.S. Koltick, Heng Xu, J. T. Linnemann, Gregory R Snow, B. G. Pope, Victor Daniel Elvira, S. Youssef, Elizaveta Shabalina, Robert Kehoe, J. Balderston, D. Lincoln, Eunil Won, J. T. White, S. A. Jerger, A. Leflat, W. G. Cobau, M. I. Martin, Ph. Mangeot, Raymond Brock, Boaz Klima, H. Johari, V. Balamurali, D. Norman, S. Willis, M. Pang, A. N. Galyaev, W. E. Cooper, Daniel R Claes, N. A. Roe, S. Chopra, M. Chung, K. Denisenko, A. L. Lyon, Shuichi Kunori, J. Jaques, Ron Lipton, J. Womersley, J. Featherly, Nikolai Mokhov, V. Glebov, Marvin Johnson, S. Feher, A. V. Kozelov, Brajesh C Choudhary, Bobby Samir Acharya, H. A. Neal, C. T. Murphy, H. C. Shankar, M. Goforth, G. Finocchiaro, C. Cretsinger, S. Durston-Johnson, M. Strovink, E. James, A. Klatchko, N. Denisenko, S. Reucroft, C. Yoshikawa, Gilvan Alves, Andrew White, P. Grudberg, T. McMahon, Y. E. Gutnikov, J. Kourlas, John Hobbs, Young-Sang Yu, D. Pušeljić, S. P. Denisov, M. R. Krishnaswamy, M. Mohammadi-Baarmand, F. Hsieh, S. Grünendahl, D. Nešić, A. Para, Sergey Chekulaev, Haifeng Li, I. Adam, P. Rubinov, K. W. Merritt, A. L. Spadafora, J. F. Bartlett, Yanwen Liu, L. Lueking, Meenakshi Narain, A. Peryshkin, K. Bazizi, A. Narayanan, M. L. Kelly, M. Sosebee, Howard Gordon, K. C. Frame, O. Ramirez, J. Alitti, J. Bantly, Andrew Brandt, R. Engelmann, Liu Chen, H.E. Miettinen, J. Yang, V. M. Podstavkov, M. Fortner, J. Perkins, J. Borders, Dongliang Zhang, J. Z.Y. Jiang, L. T. Goss, E. A. Kozlovski, H. Haggerty, and S. Lökös

Subjects
Quantum chromodynamics, Physics, Particle physics, High Energy Physics::Phenomenology, Electroweak interaction, Tevatron, General Physics and Astronomy, Multiplicity (mathematics), Jet (particle physics), law.invention, Nuclear physics, law, High Energy Physics::Experiment, Production (computer science), Rapidity, Collider
Abstract

A study of the particle multiplicity between jets with large rapidity separation has been performed using the D\O\ detector at the Fermilab Tevatron $p\bar{p}$ Collider operating at $\sqrt{s}=1.8$\,TeV. A significant excess of low-multiplicity events is observed above the expectation for color-exchange processes. The measured fractional excess is $1.07 \pm 0.10({\rm stat})~{ + 0.25}_{- 0.13}({\rm syst})\%$, which is consistent with a strongly-interacting color-singlet (colorless) exchange process and cannot be explained by electroweak exchange alone. A lower limit of $0.80\%$ (95\% C.L.) is obtained on the fraction of dijet events with color-singlet exchange, independent of the rapidity gap survival probability.

Published
1996

23. Second Generation Leptoquark Search inpp¯Collisions ats=1.8TeV

Author

N. A. Roe, S. Chopra, M. Chung, E. Amidi, J. V.D. Wirjawan, J. R. T. de Mello Neto, P. A. Rapidis, S. P. Denisov, M. R. Krishnaswamy, B. May, F. Hsieh, S. Grünendahl, M. L. Kelly, Howard Gordon, A. Para, K. C. Frame, O. Ramirez, Sergey Chekulaev, Raymond Brock, Boaz Klima, A. Kernan, A. Jonckheere, Stephan Linn, I. Adam, P. Rubinov, T. Huehn, D. Norman, N. Oshima, K. Streets, Vipin Bhatnagar, S. Youssef, A. Goldschmidt, K. W. Merritt, A. L. Spadafora, Elizabeth Gallas, S. Willis, C. S. Mishra, G. Guglielmo, J. F. Bartlett, D. Neić, Yanwen Liu, L. Lueking, C. Cretsinger, M. Pang, R. L. McCarthy, M. D. Marx, H. D. Wahl, Daria Zieminska, B. Gobbi, R. Partridge, E. Flattum, G. Griffin, R. Hatcher, Vasken Hagopian, M. Strovink, E. James, J. Bendich, S. Rusin, H. Weerts, R. D. Schamberger, A. N. Galjaev, A. Smith, J. F. Lebrat, Y. Pischalnikov, Ulrich Heintz, Robert Kehoe, D. Fein, Jasvinder A. Singh, L. Markosky, H. Jöstlein, C. H. Park, M. Diesburg, R. J. Madaras, H. S. Mao, G. Di Loreto, J. Balderston, Peter Nemethy, K. Denisenko, N. Parua, T. Fahland, D. L. Adams, A. Baden, G. C. Blazey, F. Wen, E. W. Anderson, W. E. Cooper, H. Johnstad, T. Yasuda, Matthew Jones, D. Hedin, D. Denisov, J. Teiger, Srinivasan Rajagopalan, G. Eppley, Daniel R Claes, J. Yang, D. Owen, J. Wilcox, W. Smart, K. A. Johns, Thomas Ferbel, W. Y. Chen, Dan Green, J. G.R. Lima, R. Astur, Erich Varnes, J. M. De Miranda, S. Igarashi, P. R. G. Virador, J. Tarazi, G. Wang, Alberto Santoro, T. Heuring, Q. Z. Li-Demarteau, I. Bertram, Bruno Mansoulie, A. S. Ito, A. L. Lyon, Shuichi Kunori, D. Lincoln, Eunil Won, P. I. Goncharov, R. Yamada, George R. Kalbfleisch, W. Guryn, V. M. Podstavkov, M. Sosebee, F. Lobkowicz, Seong Keun Kim, Randy Ruchti, Paolo Franzini, V. S. Narasimham, S. Fuess, I. V. Mandrichenko, S. H. Ahn, Allen Mincer, L. Z. Wang, Thomas G Trippe, T. Rockwell, V. Oguri, Christina Gao, R. Hernández-Montoya, A. Milder, W. X. Gu, R. L. Dixon, C. T. Murphy, Michael Rijssenbeek, Sharon Hagopian, C. Murphy, H. L. Melanson, P. Z. Quintas, M. Fortner, J. M. Hauptman, J. Alitti, Cecilia Elena Gerber, S. Fahey, A. A. Mayorov, A. K.A. Maciel, J. Bantly, N. Grossman, J. Perkins, M. K. Fatyga, M. H.G. Souza, Orin I. Dahl, John Rutherfoord, V. N. Evdokimov, J. Warchol, B. Gibbard, Jianming Qian, J. H. Christenson, G. Finocchiaro, D.S. Koltick, M. Bhattacharjee, V. Sirotenko, O. V. Eroshin, J. Sculli, V. A. Bezzubov, R. Hirosky, Mary Beth Adams, H. E. Montgomery, Jing Li, Phillip Gutierrez, J. P. Negret, R. P. Smith, S. Glenn, Tong Hu, J. McKinley, S. Durston-Johnson, J. Jaques, P. Bloom, Michael Shupe, D. A. Stoianova, J. A. Wightman, S. Krzywdzinski, Ron Lipton, Laurent Chevalier, S. Reucroft, Stephen Wimpenny, V. I. Kochetkov, N. I. Bojko, J. Womersley, T. L. Taylor, Y. S. Zhu, C. Yoshikawa, S. Gao, Andrew Brandt, G. Álvarez, R. Snihur, T. Marshall, A. Zylberstejn, Nikolai Mokhov, J. A. Guida, D. Casey, J. Wang, Harrison Prosper, Heriberto Castilla-Valdez, N. Varelas, M. L. Stevenson, S. Feher, H. Greenlee, James C. Green, R. Engelmann, Liu Chen, J. Kotcher, D. P. Stoker, Darien Wood, Allan G Clark, S. M. Chang, Nicholas John Hadley, J. S. Hoftun, J. N. Butler, A. Bross, P. D. Grannis, Brajesh C Choudhary, R. E. Lanou, D. Vititoe, A. Bischoff, A. V. Kostritskiy, M.K. Fatyga, N. Graf, H. Piekarz, S. Blessing, R. J. Genik, H.E. Miettinen, Rajendran Raja, C. Shaffer, D. Cullen-Vidal, K. Genser, Sissel Hansen, Scott Snyder, Bobby Samir Acharya, H. A. Neal, R. Markeloff, J. Yu, Serban Protopopescu, F. Nang, C. K. Jung, N. N. Biswas, H. C. Shankar, J. T. Linnemann, R. K. Shivpuri, S. C. Loken, B. Baldin, C. Boswell, M. Goforth, D. Pueljić, Y. Ducros, Gilvan Alves, Brad Abbott, C. L. Kim, C. Klopfenstein, J. Drinkard, M. Tartaglia, S. Abachi, Hiroaki Aihara, K. Bazizi, Yu Fisyak, J. M. Guida, Welathantri Gd Dharmaratna, Kaushik De, D. Stewart, S. N. Gurzhiev, Suman Bala Beri, P. M. Tuts, S. H. Aronson, P. Padley, Alexey Volkov, K. S. Hahn, D. Cutts, R. W. Stephens, Victor Daniel Elvira, M. Abolins, Dhiman Chakraborty, James H Cochran, Mitchell Wayne, P. Mooney, Y. H. Zhou, H. Schellman, J. M. Kohli, G. E. Forden, A. P. Heinson, Greg Landsberg, N. K. Mondal, H. T. Diehl, A. L. Read, J. Thompson, Quing Zhu, B. Gómez, A. Boehnlein, P. M. Sood, T. L. Geld, Z. H. Zhu, Shashikant Dugad, J. Ellison, D. Edmunds, E. Neis, M. Paterno, J. Borders, R. Demina, R. E. Hall, J. Z.Y. Jiang, M. D. Peters, L. T. Goss, M. Mohammadi-Baarmand, L. Oesch, Haifeng Li, E. A. Kozlovski, H. Haggerty, S. Lökös, D. Buchholz, Meenakshi Narain, A. Peryshkin, P. Tamburello, Heng Xu, W. A. Wenzel, L. T. Kerth, A. Narayanan, Ting Hu, B. G. Pope, Gregory R Snow, A. Zieminski, P. Yamin, N. Amos, S. Y. Jun, S. Mani, Elizaveta Shabalina, R. Madden, L. Rasmussen, Peter W. Draper, S. Margulies, S. Lami, A. Pluquet, P.F. Ermolov, Yanxi Zhang, A. Koltick, V. S. Burtovoi, J. T. White, J. Featherly, V. Glebov, Marvin Johnson, A. V. Kozelov, T. McKibben, M. V. S. Rao, Alexander Vorobiev, Pushpalatha C Bhat, M. Mudan, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, A. Taketani, Y. M. Park, S.A. Kahn, M. Demarteau, R. E. Avery, S. A. Jerger, A. Leflat, W. G. Cobau, M. I. Martin, J. S. Kang, Ph. Mangeot, H. Johari, V. Balamurali, Andrew White, P. Grudberg, T. McMahon, Y. E. Gutnikov, J. Kourlas, John Hobbs, Young-Sang Yu, T. Joffe-Minor, C. Yanagisawa, H. E. Fisk, J. Solomon, B. I. Klochkov, F. Borcherding, E. Oltman, Sarah Catherine Eno, Vyacheslav Klyukhin, and Ying Li

Subjects
Quark, Physics, Particle physics, Physics::Instrumentation and Detectors, Branching fraction, High Energy Physics::Phenomenology, Tevatron, General Physics and Astronomy, Particle identification, Nuclear physics, High Energy Physics::Experiment, Leptoquark, Fermilab, Neutrino, Lepton
Abstract

We report on a search for second generation scalar leptoquarks with the D0 detector at the Fermilab Tevatron pp collider at √s = 1.8 TeV. This search is based on 12.7 pb-1 of data. Second generation leptoquarks are assumed to be produced in pairs and to decay into a neutrino and quark with branching ratio β or into a neutrino and quark with branching ratio 1 - β. We obtain cross section times branching ratio limits as a function of leptoquark mass and set lower limits on the leptoquark mass at the 95% confidence level.

Published
1995

24. Study of the Strong Coupling Constant UsingW+JetProcesses

Author

J. Drinkard, Jianming Qian, M. Tartaglia, B. May, Kaushik De, I. Bertram, Tong Hu, Bruno Mansoulie, S. H. Aronson, M. Mohammadi-Baarmand, S. Fahey, F. Borcherding, J. Yu, B. Gobbi, F. Lobkowicz, C. L. Kim, Hiroaki Aihara, P. I. Goncharov, P. M. Tuts, R. W. Stephens, W. Guryn, Haifeng Li, T. Rockwell, R. L. Dixon, Michael Rijssenbeek, W. Y. Chen, George R. Kalbfleisch, Paolo Franzini, V. S. Narasimham, Thomas G Trippe, W. X. Gu, D. Buchholz, A. A. Mayorov, E. Oltman, M. K. Fatyga, Jasvinder A. Singh, Meenakshi Narain, A. Peryshkin, H. Johnstad, T. Yasuda, J. Jaques, S. Rusin, P. Yamin, S. Krzywdzinski, J. Bendich, P. Tamburello, Heng Xu, V. I. Kochetkov, G. Eppley, S. Mani, B. Gibbard, Ron Lipton, V. N. Evdokimov, J. Warchol, D.S. Koltick, Sarah Catherine Eno, L. Markosky, A. Narayanan, M. Bhattacharjee, J. Sculli, A. Zylberstejn, M. L. Kelly, Howard Gordon, K. C. Frame, Sharon Hagopian, J. Womersley, C. Cretsinger, O. Ramirez, M. Strovink, R. Madden, L. Rasmussen, G. Wang, Alberto Santoro, Gregory R Snow, P. Padley, Peter W. Draper, A. K.A. Maciel, Pushpalatha C Bhat, Alexey Volkov, M. Sosebee, Elizabeth Gallas, H. Greenlee, T. Hu, Y. Pischalnikov, Ulrich Heintz, R. Astur, T. Heuring, J. G.R. Lima, H. Jöstlein, E. James, Laurent Chevalier, Seong Keun Kim, G. Di Loreto, V. A. Bezzubov, Vyacheslav Klyukhin, Nikolai Mokhov, J. P. Negret, R. Hirosky, Ying Li, S. P. Denisov, R. P. Smith, James H Cochran, R. Hatcher, W. A. Wenzel, L. T. Kerth, M. A.C. Cummings, J. Alitti, Stephen Wimpenny, J. Bantly, B. Hoeneisen, Lee Sawyer, Mitchell Wayne, A. Bross, C. K. Jung, M. R. Krishnaswamy, H. Schellman, J. M. Kohli, S. Feher, B. Baldin, M. Diesburg, A. Baden, Michael Shupe, F. Hsieh, D. Owen, T. Marshall, Gilvan Alves, D. Pueljić, T. Joffe-Minor, G. C. Blazey, C. Yanagisawa, J. Tarazi, M. H.G. Souza, Darien Wood, Nicholas John Hadley, Andrew Brandt, R. Engelmann, Liu Chen, H.E. Miettinen, S. Grünendahl, A. Para, J. Thompson, Sergey Chekulaev, B. Gómez, Z. H. Zhu, W. Smart, K. A. Johns, T. L. Taylor, R. Yamada, S. H. Ahn, Y. Y. Shao, Serban Protopopescu, J. Wang, Harrison Prosper, A. Taketani, Y. M. Park, Brajesh C Choudhary, S.A. Kahn, H. E. Montgomery, S. A. Jerger, Raymond Brock, Boaz Klima, A. S. Ito, Shashikant Dugad, M. D. Marx, H. D. Wahl, S. Blessing, Y. Ducros, H. E. Fisk, J. Solomon, M. Demarteau, R. E. Avery, I. Adam, P. Rubinov, D. Denisov, J. Teiger, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, D. P. Stoker, Orin I. Dahl, John Rutherfoord, Scott Snyder, R. Markeloff, M. Abolins, R. Snihur, N. Varelas, R. Demina, A. Leflat, S. Fuess, K. W. Merritt, N. Amos, S. Margulies, S. Lami, A. L. Spadafora, G. E. Forden, A. P. Heinson, A. Pluquet, Mary Beth Adams, P. A. Rapidis, W. G. Cobau, M. I. Martin, C. Shaffer, D. Cullen-Vidal, K. Genser, V. Oguri, P. Mooney, S. M. Chang, Heriberto Castilla-Valdez, K. Denisenko, J. F. Bartlett, N. A. Roe, S. Chopra, M. Chung, P.F. Ermolov, Yanxi Zhang, D. Norman, D. Neić, Yanwen Liu, F. Wen, A. Kernan, A. Jonckheere, N. N. Biswas, E. W. Anderson, N. K. Mondal, H. T. Diehl, J. Yang, Victor Daniel Elvira, L. Lueking, B. I. Klochkov, V. Sirotenko, Stephan Linn, R. E. Hall, V. S. Burtovoi, J. S. Kang, J. L. González Solís, James C. Green, A. Boehnlein, P. M. Sood, P. Bloom, J. A. Wightman, J. Ellison, A. L. Lyon, Shuichi Kunori, M. Mudan, K. Bazizi, R. J. Madaras, N. Oshima, K. S. Hahn, T. Huehn, Daria Zieminska, S. Willis, M. Pang, N. I. Bojko, O. V. Eroshin, J. Kotcher, J. Featherly, D. Cutts, V. M. Podstavkov, R. D. Schamberger, A. Smith, D. Fein, Allen Mincer, G. Lvarez, J. F. Lebrat, V. Glebov, Marvin Johnson, A. V. Kozelov, S. Gao, Andrew White, Greg Landsberg, C. T. Murphy, Erich Varnes, D. Stewart, S. N. Gurzhiev, J. M. De Miranda, M. Fortner, Phillip Gutierrez, M. L. Stevenson, T. L. Geld, A. Bischoff, J. Perkins, P. Grudberg, T. McMahon, M. Nicola, E. Amidi, J. V.D. Wirjawan, Y. E. Gutnikov, Ph. Mangeot, A. V. Kostritskiy, M. Paterno, J. R. T. de Mello Neto, Allan G Clark, D. Hedin, G. Finocchiaro, N. Graf, J. Kourlas, N. Grossman, Sissel Hansen, J. M. Guida, J. S. Hoftun, J. N. Butler, P. D. Grannis, John Hobbs, F. Nang, H. Piekarz, Dhiman Chakraborty, Quing Zhu, Jing Li, A. N. Galyaev, S. Durston-Johnson, S. Youssef, C. S. Mishra, Young-Sang Yu, M.K. Fatyga, N. Denisenko, S. Reucroft, Bobby Samir Acharya, H. A. Neal, H. C. Shankar, J. T. Linnemann, C. Yoshikawa, Robert Kehoe, M. Goforth, J. Balderston, R. L. McCarthy, J. Borders, G. Guglielmo, C. Klopfenstein, D. Lincoln, Eunil Won, H. L. Melanson, P. Z. Quintas, W. E. Cooper, Daniel R Claes, Dongliang Zhang, A. Klatchko, J. Z.Y. Jiang, I. V. Mandrichenko, Vasken Hagopian, Y. Fisyak, J. H. Christenson, H. Johari, V. Balamurali, R. Hernández-Montoya, A. Milder, L. T. Goss, Peter Nemethy, B. G. Pope, H. Weerts, C. Murphy, K. Streets, Vipin Bhatnagar, R. Partridge, E. Flattum, G. Griffin, N. Parua, C. H. Park, Elizaveta Shabalina, H. S. Mao, Matthew Jones, D. L. Adams, E. A. Kozlovski, J. T. White, H. Haggerty, S. Lökös, S. Igarashi, P. R. G. Virador, T. McKibben, M. V. S. Rao, Q. Z. Li-Demarteau, Alexander Vorobiev, Randy Ruchti, C. Boswell, S. Abachi, Suman Bala Beri, S. Glenn, J. McKinley, D. A. Stoianova, Wagner Carvalho, D. Vititoe, R. J. Genik, A. L. Read, D. Edmunds, E. Neis, Andre Sznajder, M. D. Peters, L. Oesch, A. Goldschmidt, T. Fahland, J. Wilcox, Ting Hu, A. Zieminski, S. Y. Jun, J. A. Guida, D. Casey, Rajendran Raja, S. C. Loken, Brad Abbott, Welathantri Gd Dharmaratna, J. M. Hauptman, Cecilia Elena Gerber, and R. K. Shivpuri

Subjects
Physics, Quantum chromodynamics, Coupling constant, Particle physics, Computer Science::Information Retrieval, Hadron, Tevatron, General Physics and Astronomy, Order (ring theory), Parton, Jet (particle physics), Coupling (probability), Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The ratio of the number of {ital W}+1 jet to {ital W}+0 jet events is measured with the D0 detector using data from the 1992--93 Tevatron Collider run. For the {ital W}{r_arrow}{ital e}{nu} channel with a minimum jet {ital E}{sub {ital T}} cutoff of 25 GeV, the experimental ratio is 0.065{plus_minus}0.003(stat){plus_minus}0.007(syst). Next-to-leading order QCD predictions for various parton distributions agree well with each other and are all over 1 standard deviation below the measurement. Varying the strong coupling constant {alpha}{sub {ital s}} in both the parton distributions and the partonic cross sections simultaneously does not remove this discrepancy. {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.

Published
1995

25. Transverse energy distributions within jets in p collisions at =1.8

Author

J. G.R. Lima, A. S. Ito, G. Álvarez, N. A. Roe, J. Kotcher, C. T. Murphy, W. Y. Chen, G. Finocchiaro, George R. Kalbfleisch, Paolo Franzini, V. S. Narasimham, J. Featherly, V. Glebov, Marvin Johnson, S. Chopra, M. Chung, W. A. Wenzel, Thomas G Trippe, W. X. Gu, N. Parua, A. V. Kozelov, A. A. Mayorov, Matthew Jones, M. K. Fatyga, F. Wen, S. Durston-Johnson, R. Hatcher, R. K. Shivpuri, Sharon Hagopian, A. K.A. Maciel, A. Para, J. A. Guida, D. Casey, J. Drinkard, Allen Mincer, Kaushik De, M. Mohammadi-Baarmand, S. H. Aronson, C. K. Jung, N. Denisenko, I. V. Mandrichenko, S. A. Jerger, S. Reucroft, C. Yoshikawa, C. Cretsinger, M. Strovink, E. James, S. Igarashi, P. R. G. Virador, K. S. Hahn, D. Nešić, R. Hernández-Montoya, D. Cutts, B. May, S. Krzywdzinski, A. Milder, C. Murphy, D. Edmunds, V. I. Kochetkov, Gilvan Alves, E. W. Anderson, N. Amos, J. Jaques, E. Neis, R. Snihur, N. Varelas, Q. Z. Li-Demarteau, Haifeng Li, P. Padley, A. Leflat, Ron Lipton, Alexey Volkov, K. Streets, Vipin Bhatnagar, B. Gobbi, A. Zylberstejn, M. Bhattacharjee, J. M. Hauptman, R. Partridge, E. Flattum, Rajendran Raja, W. G. Cobau, M. I. Martin, Greg Landsberg, G. Griffin, J. Womersley, James H Cochran, Cecilia Elena Gerber, Mitchell Wayne, H. Schellman, J. M. Kohli, S. M. Chang, Randy Ruchti, H. Greenlee, S. Youssef, J. Borders, J. Thompson, Jasvinder A. Singh, J. Yu, M. D. Marx, H. D. Wahl, R. L. McCarthy, K. Denisenko, J. S. Kang, R. Hirosky, S. Feher, A. Bross, S. C. Loken, Meenakshi Narain, B. Gómez, Z. H. Zhu, A. Peryshkin, Shashikant Dugad, C. H. Park, C. S. Mishra, H. S. Mao, G. Guglielmo, A.L. Read, D. L. Adams, W. E. Cooper, H. Johnstad, T. Yasuda, C. L. Kim, T. L. Geld, Hiroaki Aihara, C. Klopfenstein, P. M. Tuts, M. D. Peters, A. L. Lyon, Shuichi Kunori, Daniel R Claes, J. Z.Y. Jiang, Serban Protopopescu, Brajesh C Choudhary, R. Demina, Robert Kehoe, A. Bischoff, Ph. Mangeot, A. V. Kostritskiy, Bobby Samir Acharya, M. L. Stevenson, M. Paterno, Brad Abbott, H. A. Neal, H. C. Shankar, R. W. Stephens, J. T. Linnemann, R. Astur, Jianming Qian, Y. Pischalnikov, Ulrich Heintz, J. Balderston, J. M. Guida, T. Huehn, Peter Nemethy, Sissel Hansen, Dhiman Chakraborty, H. Jöstlein, D. Buchholz, M. Goforth, F. Nang, D. Fein, D. Pušeljié, Vasken Hagopian, H. Weerts, A. Baden, A. Narayanan, G. C. Blazey, M. Diesburg, T. Heuring, L. Oesch, L. T. Goss, Welathantri Gd Dharmaratna, H. L. Melanson, P. Z. Quintas, K. Bazizi, M. Sosebee, Erich Varnes, A. Klatchko, T. L. Taylor, R. Yamada, J. M. De Miranda, D. Owen, N. Mokhov, N. Graf, H. Johari, V. Balamurali, D. Lincoln, J. H. Christenson, S. H. Ahn, P. Tamburello, J. Tarazi, T. McKibben, M. V. S. Rao, Heng Xu, Eunil Won, Allan G Clark, J. Alitti, Andrew White, A. Goldschmidt, Orin I. Dahl, John Rutherfoord, Heriberto Castilla-Valdez, N. Grossman, J. Bantly, P. Grudberg, P. I. Goncharov, Alexander Vorobiev, R. E. Lanou, S. Fuess, T. McMahon, Mary Beth Adams, Y. E. Gutnikov, Raymond Brock, Tong Hu, Boaz Klima, J. Kourlas, Jing Li, M.K. Fatyga, B. Baldin, E. A. Kozlovski, D. Norman, C. S. Gao, John Hobbs, P. Yamin, Andrew Brandt, R. Engelmann, Y. H. Zhou, S. Willis, M. Pang, Y. Ducros, T. Joffe-Minor, Liu Chen, G. E. Forden, C. Yanagisawa, A. P. Heinson, A. Kernan, Young-Sang Yu, V. Sirotenko, H.E. Miettinen, O. V. Eroshin, S. Mani, M. Abolins, H. Haggerty, S. Lökös, B. G. Pope, H. E. Fisk, Y. K. Li, James C. Green, S. Glenn, J. McKinley, Phillip Gutierrez, Gregory R Snow, R. E. Hall, R. Madden, L. Rasmussen, F. Borcherding, D. A. Stoianova, P. Mooney, Peter W. Draper, J. Solomon, J. Yang, Y. S. Zhu, Elizaveta Shabalina, Pushpalatha C Bhat, M. Mudan, J. Teiger, M. A.C. Cummings, V. M. Podstavkov, N. K. Mondal, H. T. Diehl, B. Hoeneisen, Lee Sawyer, J. T. White, T. Fahland, M. Fortner, E. Oltman, B. I. Klochkov, A. Taketani, A. Boehnlein, P. M. Sood, Y. M. Park, S.A. Kahn, J. Perkins, J. Ellison, Victor Daniel Elvira, P. Bloom, J. A. Wightman, M. Demarteau, R. E. Avery, J. Bendich, J. Wilcox, N. I. Bojko, M. Tartaglia, M. H.G. Souza, P. A. Rapidis, G. Wang, Alberto Santoro, Seong Keun Kim, C. Shaffer, D. Cullen-Vidal, A. Jonckheere, Stephan Linn, S. Gao, N. Oshima, K. Genser, Daria Zieminska, N. N. Biswas, R. D. Schamberger, A. N. Galjaev, A. Smith, J. F. Lebrat, Sarah Catherine Eno, H. E. Montgomery, Ting Hu, D. Vititoe, A. Zieminski, Vyacheslav Klyukhin, J. S. Hoftun, J. N. Butler, P. D. Grannis, D. P. Stoker, H. Piekarz, R. J. Genik, S. Margulies, S. Lami, A. Pluquet, P.F. Ermolov, L. T. Kerth, Yanxi Zhang, V. S. Burtovoi, S. Y. Jun, C. Boswell, S. Abachi, Suman Bala Beri, I. Bertram, Bruno Mansoulie, F. Lobkowicz, L. Z. Wang, T. Rockwell, R. L. Dixon, Michael Rijssenbeek, V. N. Evdokimov, J. Warchol, D.S. Koltick, V. A. Bezzubov, J. P. Negret, R. P. Smith, Michael Shupe, S. Rusin, J. Wang, Harrison Prosper, L. Markosky, G. Di Loreto, D. Denisov, Srinivasan Rajagopalan, Thomas Ferbel, Dan Green, R. J. Madaras, S. Fahey, D. Hedin, Yu Fisyak, D. Stewart, S. N. Gurzhiev, B. Gibbard, J. Sculli, Laurent Chevalier, Stephen Wimpenny, T. Marshall, Quing Zhu, Darien Wood, Nicholas John Hadley, S. Blessing, Scott Snyder, R. Markeloff, E. Amidi, J. V.D. Wirjawan, J. R. T. de Mello Neto, Elizabeth Gallas, W. Smart, K. A. Johns, S. P. Denisov, V. Oguri, M. R. Krishnaswamy, F. Hsieh, S. Grünendahl, Sergey Chekulaev, I. Adam, P. Rubinov, K. W. Merritt, A. L. Spadafora, J. F. Bartlett, Yanwen Liu, L. Lueking, Wlodek Guryn, M. L. Kelly, Howard Gordon, K. C. Frame, O. Ramirez, and G. Eppley

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Jet (fluid), Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Parton, Renormalization, Nuclear physics, Transverse plane, High Energy Physics::Experiment, Rapidity, Fermilab, Nuclear Experiment, Energy (signal processing)
Abstract

The distribution of the transverse energy in jets has been measured in p p collisions at s =1.8 TeV TeV using the DO detector at Fermilab. This measurement of the jet shape is made as a function of jet transverse energy in both the central and forward rapidity regions. Jets are shown to narrow both with increasing transverse energy and with increasing rapidity. Next-to-leading order partonic QCD calculations are compared to the data. Although the calculations qualitatively describe the data, they are shown to be very dependent on renormalization scale, parton clustering algorithm, and jet direction definition and they fail to describe the data in all regions consistently.

Published
1995

26. Search for heavy W bosons in 1.8 TeV p collisions

Author

P. A. Rapidis, S. Margulies, T. Joffe-Minor, S. Lami, A. Kernan, A. Jonckheere, C. Yanagisawa, A. L. Read, A. Pluquet, Stephan Linn, P.F. Ermolov, Yanxi Zhang, H. E. Fisk, J. Yang, N. Oshima, B. May, G. Eppley, P. Padley, V. S. Burtovoi, J. Solomon, Daria Zieminska, D. Edmunds, E. Neis, Alexey Volkov, R. D. Schamberger, A. N. Galjaev, A. Smith, J. F. Lebrat, Y. H. Zhou, V. M. Podstavkov, G. E. Forden, James H Cochran, A. P. Heinson, M. Mohammadi-Baarmand, J. G.R. Lima, B. Gobbi, Mitchell Wayne, H. Schellman, J. M. Kohli, M. Fortner, R. E. Hall, M. D. Peters, Bobby Samir Acharya, H. A. Neal, H. C. Shankar, S. A. Jerger, J. Perkins, S. Fuess, D. Nešić, J. T. Linnemann, J. Thompson, C. Cretsinger, M. Strovink, L. Oesch, M. Goforth, B. Gómez, A. Leflat, Jasvinder A. Singh, Pushpalatha C Bhat, M. Mudan, A. S. Ito, N. Mokhov, E. James, W. G. Cobau, M. I. Martin, H. Johnstad, T. Huehn, Z. H. Zhu, D. Fein, Erich Varnes, B. I. Klochkov, J. M. De Miranda, Shashikant Dugad, N. Grossman, Haifeng Li, Jing Li, A. Klatchko, C. Shaffer, D. Cullen-Vidal, K. Genser, N. N. Biswas, F. Borcherding, J. S. Kang, S. Krzywdzinski, T. Yasuda, V. I. Kochetkov, W. E. Cooper, Daniel R Claes, A. Zylberstejn, H. Greenlee, V. Sirotenko, M. A.C. Cummings, B. Hoeneisen, Lee Sawyer, R. Demina, Gilvan Alves, O. V. Eroshin, A. Bross, Ph. Mangeot, Pm Tuts, Serban Protopopescu, E. Oltman, K. Streets, Vipin Bhatnagar, B. Baldin, Meenakshi Narain, A. Peryshkin, A. Taketani, Phillip Gutierrez, C. Boswell, M. H.G. Souza, J. Bendich, C. T. Murphy, J. Jaques, S. Abachi, Ron Lipton, M. Bhattacharjee, Y. M. Park, P. Yepes, R. Partridge, E. Flattum, H. E. Montgomery, R. Astur, J. Womersley, A. Bischoff, A. V. Kostritskiy, G. Griffin, W. A. Wenzel, Y. Ducros, S.A. Kahn, Sarah Catherine Eno, M. Demarteau, R. E. Avery, Y. S. Zhu, C. S. Mishra, Sissel Hansen, T. Heuring, A. Goldschmidt, A. Narayanan, N. Graf, Suman Bala Beri, F. Nang, R. Hirosky, J. Yu, S. Feher, C. H. Park, H. Johari, V. Balamurali, D. Pušeljić, H. S. Mao, Vyacheslav Klyukhin, G. Guglielmo, D. P. Stoker, R. K. Shivpuri, S. Durston-Johnson, M. Sosebee, G. Wang, Alberto Santoro, Brajesh C Choudhary, D. L. Adams, Ying Li, A. Baden, D. Buchholz, K. Bazizi, V. A. Bezzubov, Seong Keun Kim, G. C. Blazey, Vasken Hagopian, H. Weerts, Sharon Hagopian, C. L. Kim, T. McKibben, M. V. S. Rao, N. Denisenko, S. Reucroft, N. Amos, G. Finocchiaro, Victor Daniel Elvira, J. P. Negret, N. A. Roe, S. Chopra, Raymond Brock, Boaz Klima, S. Glenn, J. McKinley, T. L. Taylor, J. Alitti, M. Chung, C. Yoshikawa, Hiroaki Aihara, P. Tamburello, R. P. Smith, R. Yamada, J. Bantly, J. Featherly, Heng Xu, A. K.A. Maciel, J. M. Hauptman, J. Borders, Cecilia Elena Gerber, D. A. Stoianova, P. Yamin, Michael Shupe, V. Glebov, Alexander Vorobiev, Marvin Johnson, S. Youssef, D. Norman, F. Wen, S. H. Ahn, R. Hatcher, Heriberto Castilla-Valdez, G. Álvarez, A. V. Kozelov, J. Z.Y. Jiang, J. Kotcher, Jianming Qian, Orin I. Dahl, John Rutherfoord, S. Mani, D. Vititoe, R. J. Genik, Gregory R Snow, L. T. Goss, R. W. Stephens, S. Willis, M. Pang, Robert Kehoe, Andrew White, R. Madden, N. Parua, Andrew Brandt, R. Engelmann, Liu Chen, Mary Beth Adams, J. Wang, Harrison Prosper, J. Drinkard, T. Fahland, E. W. Anderson, R. Snihur, J. Balderston, N. Varelas, L. Rasmussen, Peter W. Draper, P. Grudberg, T. McMahon, Y. E. Gutnikov, K. Denisenko, H.E. Miettinen, Allen Mincer, Y. Pischalnikov, Ulrich Heintz, J. Kourlas, Christina Gao, H. Jöstlein, J. Wilcox, A. L. Lyon, I. Bertram, W. Y. Chen, Bruno Mansoulie, Matthew Jones, E. A. Kozlovski, Tong Hu, S. M. Chang, James C. Green, D. Lincoln, Eunil Won, F. Lobkowicz, B. G. Pope, Kaushik De, Shuichi Kunori, John Hobbs, M. Diesburg, J. A. Guida, D. Casey, H. Haggerty, S. Lökös, D. Owen, J. Tarazi, H. L. Melanson, P. Z. Quintas, L. Z. Wang, George R. Kalbfleisch, T. Rockwell, R. L. Dixon, J. H. Christenson, Michael Rijssenbeek, P. Bloom, J. A. Wightman, K. S. Hahn, Paolo Franzini, V. S. Narasimham, Thomas G Trippe, W. X. Gu, Young-Sang Yu, Elizaveta Shabalina, D. Cutts, J. Teiger, S. Igarashi, P. R. G. Virador, Q. Z. Li-Demarteau, N. I. Bojko, Rajendran Raja, S. C. Loken, C. Klopfenstein, V. N. Evdokimov, M. L. Stevenson, D.S. Koltick, A. A. Mayorov, Greg Landsberg, S. Gao, Brad Abbott, S. H. Aronson, J. T. White, M. K. Fatyga, Welathantri Gd Dharmaratna, J. M. Guida, T. L. Geld, Dhiman Chakraborty, M. Paterno, Ting Hu, Randy Ruchti, J. S. Hoftun, J. N. Butler, P. D. Grannis, R. L. McCarthy, H. Piekarz, Peter Nemethy, Laurent Chevalier, Stephen Wimpenny, A. Zieminski, R. J. Madaras, D. Hedin, L. T. Kerth, T. Marshall, S. Y. Jun, Darien Wood, Nicholas John Hadley, S. Blessing, Scott Snyder, R. Markeloff, B. Gibbard, J. Sculli, M. L. Kelly, Howard Gordon, K. C. Frame, O. Ramirez, S. P. Denisov, M. R. Krishnaswamy, F. Hsieh, S. Grünendahl, A. Para, M. D. Marx, H. D. Wahl, Sergey Chekulaev, I. V. Mandrichenko, R. Hernández-Montoya, A. Milder, C. Murphy, I. Adam, P. Rubinov, Allan G Clark, K. W. Merritt, R. E. Lanou, M.K. Fatyga, C. K. Jung, A. L. Spadafora, J. F. Bartlett, Yanwen Liu, L. Lueking, M. Abolins, P. Mooney, N. K. Mondal, H. T. Diehl, A. Boehnlein, P. M. Sood, J. Ellison, P. I. Goncharov, W. Guryn, S. Rusin, L. Markosky, E. Amidi, J. V.D. Wirjawan, J. R. T. de Mello Neto, G. Di Loreto, D. Denisov, Srinivasan Rajagopalan, V. Oguri, Thomas Ferbel, Dan Green, Yu Fisyak, D. Stewart, S. N. Gurzhiev, J. Warchol, Quing Zhu, Elizabeth Gallas, S. Fahey, W. Smart, K. A. Johns, and M. Tartaglia

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Gauge boson, Branching fraction, High Energy Physics::Phenomenology, Tevatron, Standard Model, Nuclear physics, High Energy Physics::Experiment, Neutrino, Lepton, Boson
Abstract

A search for a heavy charged gauge boson, W′, using the decay channels W′ → eν and W′ → τν → eνν ν is reported. The data used in the analysis were collected by the DO experiment at the Fermilab Tevatron during the 1992-93 p p collider run from an integrated luminosity of 13.9 ± 0.8 pb−1 at s =1.8 TeV . Assuming that the neutrino from W′ decay is stable and has a mass significantly less than mW′, an upper limit at the 95% confidence level is set on the cross section times branching ratio for p p → W′ → eν . A W′ with the same couplings to quarks and leptons as the standard model W boson is excluded for mW′

Published
1995

27. A direct limit on the heavy neutrino in tritium beta decay

Author

George R. Kalbfleisch and Moustafa Bahran

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Double beta decay, Tritium, Heavy neutrino, Direct limit, Neutrino, Beta decay
Abstract

On a combined tritium beta decay sample in excess of one billion events per keV at energies near 1.5 keV, a search for a 17 keV neutrino admixture has been performed using a derivative method. No heavy neutrino signal was observed. This direct result is independent of theoretical details as well as experimental subtractions and corrections.

Published
1995

28. Charge sharing and resolution studies of double-sided silicon microstripe detectors with boron spray implants

Author

C.D. Wilburn, E. Smith, George R. Kalbfleisch, J. Snow, M. Bullough, J. Kuehler, A.D. Lucas, T. McMahon, Phillip Gutierrez, D. Kaplan, Michael Wood, and P. Skubic

Subjects
Physics, Nuclear and High Energy Physics, Silicon, business.industry, Resolution (electron density), Detector, chemistry.chemical_element, Dot pitch, Charge sharing, Optics, chemistry, business, Instrumentation, Ohmic contact, Image resolution, Diode
Abstract

Measurements of the signal to noise, charge sharing, cluster distribution properties, charge correlation and spatial resolution as a function of angle of incidence have been conducted in a high energy pion beam at Fermilab for a variety of DC-coupled double-sided silicon microstripe detectors (Micron, Inc.) utilizing a special boron-spray technique for ohmic side isolation. Readout was accomplished with the Berkeley SVX-D IC/SRS/SDA sequencer system. Stripe pitch configurations included 50 μm and 25 μm with every stripe read out (“50 ∗ 1”, “25 ∗ 1”), and also with every other stripe read out (“50 ∗ 2”, “25 ∗ 2”). One of the detectors under study was 158 μm thick, rather than the usual 300 μm. Of interest are the establishment, for 300 μm thick detectors, of sub-2.5 μm resolution perpendicular to the beam on an ohmic side with 38 mm long stripes for both 25 ∗ 1 and 25 ∗ 2 configurations, and diode side (58 mm stripes) resolutions ranging from below 3 μm at near normal incidence to about 11 μm at 60°. At large angle the 25 ∗ 2 configuration generally gave comparable or better resolution than 25 ∗ 1. The thin detector gave a resolution ranging from about 5.5 μm at 21° to about 7 μm at 45° for 25 ∗ 1 and 6.4 to 9.0 μm for 25 ∗ 2, which, for each of the three common angles of data, was better than the resolution yielded by the 300 μm detector to which it was compared. Signals and charge sharing results are compared to detailed Monte Carlo calculations based on an energy loss distribution due to Bichsel.

Published
1995

29. Measurement of theB¯→D*lν¯ branching fractions and ‖Vcb‖

Author

S. Playfer, C. D. Jones, C. M. Daubenmier, Ryszard Stroynowski, P. Rankin, Chunjie Wang, C. Qiao, J. Gronberg, N. Horwitz, M. Goldberg, M. Chadha, Shengfeng Yang, M. Modesitt, D. F. Cowen, D. L. Kreinick, H. P. Paar, R. Fulton, G. Masek, B. Ong, R. Kennett, B. Gittelman, T. Miao, N. Kwak, B. Nemati, D. Gibaut, Juliet Ritchie Patterson, S. Nakanishi, E. H. Thorndike, D. S. Crowcroft, I. J. Kim, F. R. Wappler, Pu Wang, E. Nordberg, Jeffrey Richman, S. Roberts, C. R. Sun, W. T. Ford, Kenneth Bloom, M. Battle, R. D. Kass, J. G. Smith, R. Ammar, T. Liu, C. Bebek, S. Sanghera, G. S. Ludwig, D. Coppage, J. P. Alexander, D. H. Miller, Ha Lam, K. Lingel, A. P. Freyberger, N. Copty, R. Balest, H. Severini, S. Chan, S. Menary, George R. Kalbfleisch, N. Hancock, G. C. Moneti, G. Vasseur, C. O'Grady, G. Crawford, P. Gaidarev, X. Fu, N. Katayama, G. Eigen, H. Kagan, Y. Kwon, M. Ogg, D. Z. Besson, R. S. Galik, J. J. Thaler, J. Urheim, Dave Britton, R. L. McIlwain, V. Shelkov, S. Schrenk, E. I. Shibata, D. M. Coffman, B. C. Barish, Karl Berkelman, J. Masui, B. Spaan, L. Gibbons, B. K. Heltsley, D. B. MacFarlane, M. Daoudi, R. Davis, J. Fast, J. K. Nelson, A. J. Weinstein, M. L. Kelly, G. Zhu, George D Gollin, K. K. Gan, M.A. Palmer, Vivek Jain, H. N. Nelson, S. W. Gray, Richard Wilson, M. Momayezi, Jungil Lee, Christopher G. White, Anders Ryd, M. Athanas, Y. Skovpen, R. J. Morrison, Mats A Selen, M. Sapper, R. Mountain, R. Ehrlich, B. Geiser, D. Cinabro, M. Procario, Sheldon Stone, D. He, M. Sung, A. J. Sadoff, S. Patton, Paul Avery, D. Payne, H. A. Cho, S. L. Jones, T. E. Browder, Alice Bean, J. Dominick, D. Acosta, Ilya Kravchenko, R. Kutschke, F. Butler, S. Salman, Michael Wood, M. S. Alam, Daniel Johnson, D. L. Hartill, J. S. Miller, T. Skwarnicki, K. W. Edwards, Z. Egyed, M. Thulasidas, R. Malchow, S. E. Csorna, H. Yamamoto, P. Skubic, John Yelton, M. Lambrecht, R. Poling, T. K. Nelson, M. Lohner, C. R. Ng, P. C. Kim, J. Ernst, Marina Artuso, S. Kotov, K. Kinoshita, D. Perticone, D. Sperka, V. Savinov, S. Henderson, Michael S. Witherell, M. M. Zoeller, K. Honscheid, Yoram Rozen, F. Würthwein, Alain Bellerive, E. R.F. Hyatt, M. Lattery, Philip Baringer, S. Ball, Xiangjun Xing, Ruifang Wang, G. Wei, P. M. Patel, T. Bergfeld, D. Riley, J. Bartelt, Maurice Garcia-Sciveres, P. S. Drell, Yuichi Kubota, Jorge Luis Rodriguez, M. Saulnier, D. G. Cassel, B. I. Eisenstein, Z. Ling, I. P.J. Shipsey, H. Tajima, D. Fujino, J. J. O'Neill, Yurii V. Mukhin, W. R. Ross, I. Volobouev, K. Cho, N. B. Mistry, J. Mevissen, J. Kandaswamy, D. Peterson, P. Zadorozhny, and F. Muheim

Subjects
Combinatorics, Semileptonic decay, Physics, Particle properties, Partial width, Branching fraction, B meson
Abstract

From this partial width we calculate [ital [bar B]][r arrow][ital D][sup *][ital l][bar [nu]] branching fractions that do not depend on [ital f][sub +[minus]]/[ital f][sub 00] or the individual [ital B] lifetimes, but only on the charged to neutral [ital B] lifetime ratio. The product of the CKM matrix element [vert bar][ital V][sub [ital c][ital b]][vert bar] times the normalization of the decay form factor at the point of no recoil of the [ital D][sup *] meson, [ital scrF]([ital y]=1), is determined from a linear fit to the combined differential decay rate of the exclusive [ital [bar B]][r arrow][ital D][sup *][ital l][bar [nu]] decays: [vert bar][ital V][sub [ital c][ital b]][vert bar][ital scrF](1)=0.0351[plus minus]0.0019 (stat) [plus minus]0.0018 (syst) [plus minus]0.0008 (lifetime). The value for [vert bar][ital V][sub [ital c][ital b]][vert bar] is extracted using theoretical calculations of the form factor normalization.

Published
1995

30. Observation of InclusiveBDecays to the Charmed BaryonsΣc++andΣc0

Author

D. G. Cassel, Ron Poling, Daniel Schmidt, Kenneth Bloom, P.M. Patel, J. Mevissen, J. Kandaswamy, N. Katayama, D. S. Akerib, T. K. Nelson, G. Eigen, D. Peterson, G. Crawford, B. I. Eisenstein, D. B. MacFarlane, A. J. Weinstein, H. N. Nelson, D. L. Kreinick, P. Baringer, M. L. Kelly, S. W. Gray, Ha Lam, H. Kagan, S. Roberts, J. Urheim, H. P. Paar, R. Fulton, N. Kwak, J. K. Nelson, T. Liu, C. Bebek, Richard Wilson, D. He, E. Nordberg, Jeffrey Richman, G. S. Ludwig, M. Battle, W. R. Ross, P. S. Drell, G. Vasseur, C. Qiao, Jorge Luis Rodriguez, R. Mountain, B. Nemati, F. Morrow, A. P. Freyberger, George R. Kalbfleisch, M. Procario, M. Saulnier, T. E. Browder, R. Davis, I. Volobouev, H. Yamamoto, Shengfeng Yang, B. C. Barish, S. Menary, Dave Britton, R. L. McIlwain, R. Ammar, J. Masui, V. Shelkov, S. Schrenk, D. F. Cowen, Maurice Garcia-Sciveres, George D Gollin, S. Salman, Karl Berkelman, R. J. Morrison, Mats A Selen, A. J. Sadoff, Michael Wood, R. Stephens, Vivek Jain, S. E. Csorna, Alice Bean, Y. Kwon, G. C. Moneti, M. S. Alam, R. Kennett, B. Gittelman, J. Ernst, H. Severini, S. Chan, P. Skubic, J. Snow, J. S. Miller, D. Riley, Anders Ryd, M. Athanas, D. Z. Besson, D. M. Coffman, M. Modesitt, M. Daoudi, K. Cho, S. Sanghera, B. K. Heltsley, M. Thulasidas, I. J. Kim, E. R.F. Hyatt, M. Lattery, R. Kutschke, C. M. Daubenmier, N. B. Mistry, Ryszard Stroynowski, N. Hancock, M.A. Palmer, F. Butler, J. Bartelt, I. P.J. Shipsey, C. D. Jones, K. K. Gan, Sheldon Stone, P. Zadorozhny, F. Muheim, K. Kinoshita, C. O'Grady, Paul Avery, E. I. Shibata, J. G. Smith, P. Rankin, Y. Skovpen, R. Malchow, John Yelton, M. Lambrecht, J. J. Thaler, M. Goldberg, R. Ehrlich, D. N. Brown, Marina Artuso, Chunjie Wang, D. Cinabro, S. Playfer, Yuichi Kubota, S. L. Jones, J. Gronberg, N. Horwitz, M. Chadha, J. Dominick, D. Perticone, V. Savinov, S. Patton, M. Sapper, C. R. Sun, Yoram Rozen, F. Würthwein, W. T. Ford, R. D. Kass, G. Zhu, R. Balest, S. Ball, D. Acosta, M. Sung, H. Tajima, Daniel Johnson, T. Skwarnicki, D. Fujino, P. C. Kim, J. J. O'Neill, S. Henderson, D. H. Miller, X. Fu, B. Geiser, Pu Wang, Jungil Lee, Yurii V. Mukhin, M. M. Zoeller, S. Nakanishi, E. H. Thorndike, D. Coppage, J. P. Alexander, M. Lohner, T. Miao, M. Ogg, R. S. Galik, K. W. Edwards, Z. Egyed, D. Sperka, Ruifang Wang, T. Bergfeld, P. L. Wang, B. Ong, J. Fast, Christopher G. White, D. Payne, H. A. Cho, D. L. Hartill, C. R. Ng, Michael S. Witherell, N. Copty, K. Honscheid, G. Wei, G. Masek, Juliet Ritchie Patterson, and K. Lingel

Subjects
Physics, Charmed baryons, Stereochemistry, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, General Physics and Astronomy, Cornell Electron Storage Ring, Atomic physics
Abstract

Using data collected in the region of the [Upsilon](4[ital S]) resonance with the CLEO II detector operating at the Cornell Electron Storage Ring, we report on evidence for the production of [Sigma][sub [ital c]][sup ++] and [Sigma][sub [ital e]][sup 0] baryons in [ital B] decays, with [Sigma][sub [ital c]][r arrow][Lambda][sub [ital c]][sup +][pi]. This observation is based on 77[plus minus]19[Sigma][sub [ital c]][sup ++] and 76[plus minus]21[Sigma][sub [ital c]][sup 0] candidates from [ital B] decays. We find the product branching fractions [ital scrB]([ital [bar B]][r arrow][Sigma][sub [ital c]][ital X])[ital scrB]([Lambda][sub [ital c]][sup +][r arrow][ital pK][sup [minus]][pi][sup +]) for [Sigma][sub [ital c]]=[Sigma][sub [ital c]][sup ++], [Sigma][sub [ital c]][sup 0], and [Sigma][sub [ital c]][sup +] to be (2.1[plus minus]0.8[plus minus]0.7)[times]10[sup [minus]4], (2.3[plus minus]0.8[plus minus]0.7)[times]10[sup [minus]4], and less than 4.8[times]10[sup [minus]4] at 90% confidence level, respectively. A study of the [Sigma][sub [ital c]][sup ++] and [Sigma][sub [ital c]][sup 0] momentum spectra indicates that [ital B] decays to two-body final states with [Sigma][sub [ital c]] are suppressed.

Published
1994

31. Measurement of Cabibbo-Suppressed Decays of theτLepton

Author

F. Butler, R. Malchow, D. M. Coffman, John Yelton, M. Lambrecht, P. Gaiderev, B. K. Heltsley, G. C. Moneti, C. M. Daubenmier, Ryszard Stroynowski, Barry C. Barish, C. D. Jones, N. Kwak, E. I. Shibata, M. Sapper, S. Menary, Dave Britton, R. L. McIlwain, P. S. Drell, Jorge Luis Rodriguez, V. Shelkov, S. Schrenk, P. Rankin, G. D. Gollin, M. Saulnier, D. Payne, H. A. Cho, D. Fujino, P. M. Patel, J. S. Miller, M. Goldberg, J. J. O'Neill, B. Nemati, M. Thulasidas, D. Riley, R. Kennett, R. Ammar, Chunjie Wang, D. He, Pu Wang, D. H. Miller, Y. Kwon, T. E. Browder, G. Crawford, H. Kagan, D. Cinabro, N. Copty, W. R. Ross, B. Gittelman, H. Yamamoto, Maurice Garcia-Sciveres, P. L. Wang, J. Bartelt, D. Z. Besson, Jungil Lee, H. Severini, S. Chan, R. Davis, M. Daoudi, B. Ong, R. Ehrlich, I. P.J. Shipsey, Ha Lam, I. Volobouev, S. Patton, C. O'Grady, K. K. Gan, M. L. Kelly, J. Fast, D. G. Cassel, Christopher G. White, Y. Skovpen, S. L. Jones, P. Skubic, X. Fu, G. Vasseur, Yuichi Kubota, S. W. Gray, R. J. Morrison, I. J. Kim, H. Tajima, Marina Artuso, J. Dominick, D. Acosta, K. W. Edwards, Mats A Selen, Z. Egyed, Daniel Johnson, M. Procario, D. Perticone, V. Savinov, D. Sperka, Ruifang Wang, Shengfeng Yang, A. J. Sadoff, Richard Wilson, Yoram Rozen, F. Würthwein, T. Bergfeld, J. Masui, Philip Baringer, D. L. Kreinick, S. Salman, S. Ball, K. Honscheid, D. F. Cowen, B. I. Eisenstein, M. M. Zoeller, Michael Wood, J. Urheim, B. Geiser, C. R. Sun, W. T. Ford, Vivek Jain, M. Modesitt, J. K. Nelson, T. Liu, R. D. Kass, R. Balest, T. Miao, R. Mountain, D. L. Hartill, J. G. Smith, Jon J Thaler, K. Cho, M.A. Palmer, C. Bebek, Sheldon Stone, Paul Avery, R. Poling, N. B. Mistry, S. Roberts, M. Battle, C. R. Ng, M. Lohner, A. P. Freyberger, J. Mevissen, J. Kandaswamy, George R. Kalbfleisch, Michael S. Witherell, D. Peterson, J. Snow, G. Zhu, G. Masek, Juliet Ritchie Patterson, T. Skwarnicki, P. C. Kim, S. Henderson, T. K. Nelson, S. Sanghera, N. Hancock, G. Wei, K. Lingel, M. Sivertz, Alice Bean, H. P. Paar, R. Fulton, R. Kutschke, M. S. Alam, J. Ernst, E. R.F. Hyatt, M. Lattery, P. Zadorozhny, F. Muheim, D. N. Brown, S. Playfer, C. Qiao, E. Nordberg, Jeffrey Richman, Kenneth Bloom, S. Nakanishi, E. H. Thorndike, G. S. Ludwig, N. Katayama, D. B. MacFarlane, D. S. Akerib, A. J. Weinstein, D. Coppage, J. P. Alexander, G. Eigen, H. N. Nelson, M. Ogg, R. S. Galik, Y. Muheim, J. Gronberg, N. Horwitz, M. Chadha, M. Sung, R. Stephens, S. E. Csorna, Karl Berkelman, K. Kinoshita, Anders Ryd, and M. Athanas

Subjects
Physics, Semileptonic decay, High Energy Physics - Phenomenology, Particle decay, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Cornell Electron Storage Ring, High Energy Physics - Experiment
Abstract

Branching ratios for the dominant Cabibbo-suppressed decays of the $\tau$ lepton have been measured by CLEO~II in $e^+ e^-$ annihilation at CESR ($\sqrt{s} \sim 10.6$~GeV) using kaons with momenta below $0.7\ \rm GeV/c$. The inclusive branching ratio into one charged kaon is $(1.60 \pm 0.12 \pm 0.19)\%$. For the exclusive decays, $B(\tau \to K^-) = (0.66 \pm 0.07 \pm 0.09)\%$, $B(\tau \to K^- \pi^0) = (0.51 \pm 0.10 \pm 0.07)\%$, and, based on three events, $B(\tau \to K^- \pi^0 \pi^0) < 0.3\%$ at the 90\% confidence level. These represent significant improvements over previous results. $B(\tau\to K^- \pi^0)$ is measured for the first time with exclusive $\pi^0$ reconstruction., Comment: 11 pages uuencoded compressed postscript (process with uudecode then gunzip). hardcopies with figures can be obtained by sending mail to: preprints@lns62.lns.cornell.edu

Published
1994

32. Observation ofΛc+ decays to Λπ+π0, Σ0π+, Σ0π+π0, and Σ0π−π+π+

Author

P. Zadorozhny, F. Muheim, B. Nemati, F. Morrow, D. Besson, T. K. Nelson, P. S. Drell, S. Nakanishi, H. Kagan, E. H. Thorndike, D. N. Brown, S. Playfer, Jorge Luis Rodriguez, D. Riley, M. Saulnier, D. Coppage, S. F. Schaffner, J. Bartelt, J. P. Alexander, Anders Ryd, M. Athanas, K. Sparks, R. J. Morrison, Mats A Selen, H. A. Cho, A. J. Sadoff, D. He, Yuichi Kubota, D. Fujino, J. J. O'Neill, D. L. Hartill, M. Sapper, T. E. Browder, W. R. Ross, Daniel Schmidt, Richard Wilson, R. Kennett, R. Poling, C. R. Ng, Yurii V. Mukhin, M. S. Alam, B. Gittelman, I. Volobouev, Michael S. Witherell, G. C. Moneti, Marina Artuso, P. Wilson, A. J. Weinstein, J. Ernst, I. J. Kim, R. Stephens, G. Crawford, M. Lattery, J. Urheim, H. N. Nelson, S. E. Csorna, E. I. Shibata, P. Skubic, D. M. Coffman, B. K. Heltsley, N. Kwak, K. Kinoshita, Daniela Bortoletto, N. Copty, I. P.J. Shipsey, C. R. Sun, F. Butler, W. T. Ford, K. Cho, R. Malchow, D. Cinabro, R. D. Kass, R. Balest, N. B. Mistry, J. Whitmore, Jungil Lee, S. Menary, B. Geiser, John Yelton, J. Gronberg, S. Patton, N. Horwitz, R. L. McIlwain, M. Chadha, D. H. Miller, F. Shen, R. Davis, H. P. Paar, R. Fulton, Maurice Garcia-Sciveres, R. Ammar, G. Masek, V. Shelkov, S. Schrenk, M. Lohner, D. Acosta, Juliet Ritchie Patterson, J. Mevissen, Daniel Johnson, X. Fu, T. Liu, T. Skwarnicki, M. Daoudi, J. Kandaswamy, Sheldon Stone, S. Sanghera, H. Severini, S. Chan, C. Bebek, Paul Avery, D. L. Kreinick, M. L. Kelly, K. K. Gan, Y. Skovpen, P. C. Kim, S. Henderson, N. Hancock, D. Peterson, A. P. Freyberger, C. O'Grady, George R. Kalbfleisch, S. W. Gray, K. Honscheid, H. Tajima, Hubert Kroha, S. Roberts, J. Snow, Pu Wang, M. Modesitt, M. Battle, M. Sung, E. Nordberg, Jeffrey Richman, G. S. Ludwig, M. M. Zoeller, Karl Berkelman, J. G. Smith, D. G. Cassel, M. Ogg, G. Zhu, T. Miao, K. Lingel, M. Procario, S. Salman, Michael Wood, H. Worden, M. Lambrecht, A. Bean, J. K. Nelson, S. Yang, B. Ong, J. Fast, Christopher G. White, Z. Egyed, D. Sperka, Ruifang Wang, D. F. Cowen, P. L. Wang, C. M. Daubenmier, Ryszard Stroynowski, P. Rankin, Chunjie Wang, D. Perticone, V. Savinov, Yoram Rozen, F. Würthwein, Philip Baringer, S. Ball, J. S. Miller, M. Thulasidas, R. Ehrlich, N. Katayama, S. L. Jones, D. S. Akerib, J. Dominick, G. Eigen, R. Kutschke, H. Yamamoto, Ha Lam, G. Vasseur, B. C. Barish, J. Masui, Vivek Jain, C. D. Jones, and M. Goldberg

Subjects
Nuclear physics, Baryon, Physics, Nuclear and High Energy Physics, Argus, Particle physics, Branching fraction, Branching (polymer chemistry), computer, computer.programming_language
Abstract

We have observed the previously unseen decay modes Λπ+π0, Σ0π+π0 and Σ0π−π+π+ of the charmed baryon Λc+, as well as Λc+→Σ0π+ observed previously by ARGUS. The branching ratios for these four decay modes relative to Λc+→pK−π+ are measured to be 0.73 ±0.09± 0.16, 0.36 ±0.09±0.10, 0.21±0.05±0.05, and 0.21±0.02 ±0.04, respectively. Using the recent CLEO measurement of the branching ratio for Λc+→pK− π+, these modes account for 6% of Λc+ decays.

Published
1994

33. A measurement of

Author

R. Davis, F. Butler, D. Fujino, D. Perticone, Yurii V. Mukhin, E. Nordberg, R. Malchow, J. Masui, M. S. Witherell, B. Gittelman, M. Lambrecht, H. Lam, J. J. O'Neill, Y. Kwon, S. Chan, Yoram Rozen, S. Nakanishi, C. O'Grady, P. Rankin, J. Dominick, G. Zhu, P. S. Drell, I. P.J. Shipsey, H. Kagan, V. Savinov, S. Menary, K. K. Gan, Y. Skovpen, James P. Alexander, M. Thulasidas, R. Ehrlich, D. He, C. R. Ng, G. Masek, B. Ong, P. L. Wang, J. Mevissen, C. M. Daubenmier, Ryszard Stroynowski, H. P. Paar, M. M. Zoeller, N. Katayama, H.N. Nelson, G. Vasseur, M. Selen, J. Gronberg, D. Acosta, T. K. Nelson, J. Kandaswamy, C. R. Sun, A. J. Sadoff, J. Urheim, K. W. Edwards, J. M. Yelton, H.A. Cho, George R. Kalbfleisch, Z. Egyed, R. Ammar, P. Gaiderev, S. Roberts, M. Daoudi, D. F. Cowen, R. J. Morrison, D. R. Johnson, T. Skwarnicki, A. Ryd, A. Bean, I. J. Kim, Vivek Jain, D. Riley, R. Mountain, P. Baringer, B. Geiser, M. Battle, Pu Wang, K. Honscheid, R. D. Kass, G. S. Ludwig, H. Yamamoto, D. Sperka, P. Avery, G. C. Moneti, George D Gollin, P. M. Patel, G. Crawford, J. Snow, P. Skubic, A. J. Weinstein, R. Kennett, J. R. Patterson, J. Rodriguez, D. G. Cassel, S. Yang, S. Sanghera, F. Würthwein, D. Coppage, E. I. Shibata, M. Chadha, T. Bergfeld, S. W. Gray, D. S. Akerib, Jungil Lee, M. Goldberg, D. Payne, D. Peterson, B. Barish, K. Cho, J. Fast, A. Freyberger, K. Berkelman, J. G. Smith, Christopher G. White, B. K. Heltsley, T. Liu, J. K. Nelson, M. Lattery, N. Kwak, Sheldon Stone, E. R.F. Hyatt, S. Henderson, B. I. Eisenstein, M.A. Palmer, E. H. Thorndike, C. Qiao, M. Ogg, G. Wei, S. L. Jones, R. Fulton, T. Miao, R. Kutschke, Jeffrey Richman, J. J. Thaler, William T. Ford, D. B. MacFarlane, Kenneth Bloom, N. Hancock, K. Lingel, R. Stephens, Chunjie Wang, T. E. Browder, N. B. Mistry, N. Horwitz, D. Besson, M. Kelly, J.S. Miller, H. Severini, S. Ball, Dave Britton, R. L. McIlwain, G. Eigen, M. S. Alam, V. Shelkov, P.C. Kim, Richard Wilson, N. Copty, Yuichi Kubota, J. Ernst, R. Poling, S. Schrenk, B. Nemati, P. Zadorozhny, F. Muheim, D. Cinabro, D. N. Brown, S. Playfer, W. R. Ross, C. Bebek, I. Volobouev, D. H. Miller, X. Fu, M. Saulnier, M. Sung, M. Lohner, S. E. Csorna, K. Kinoshita, S. Patton, J. Bartelt, D.L. Kreinick, M. Modesitt, D. L. Hartill, S. Salman, C. D. Jones, Michael Wood, M. Sapper, M. Garcia-Sciveres, R. Wang, M. Procario, D. M. Coffman, M. Athanas, R. Balest, Marina Artuso, and H. Tajima

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, symbols.namesake, Branching fraction, Electron–positron annihilation, symbols, Feynman diagram, B meson, Elementary particle, Branching (polymer chemistry)
Abstract

Using the CLEO II detector at CESR, we have measured the ratio of branching fractions B (D + S → φl + ν) B (D + S → φπ + ) = 0.54 ± 0.05 ± 0.04 . We use this measurement to obtain a model dependent estimate of B (D + S → φπ + ) .

Published
1994

34. Study of the decay

Author

Juliet Ritchie Patterson, M. Modesitt, D. Payne, H. A. Cho, R. Wang, J. Gronberg, N. Horwitz, D. L. Hartill, R. Poling, C. R. Ng, G. Wei, Michael S. Witherell, D. M. Coffman, F. Butler, R. Malchow, T. Skwarnicki, John Yelton, M. Lambrecht, D. B. MacFarlane, A. J. Weinstein, B. K. Heltsley, M. S. Alam, D. He, J. G. Smith, P. M. Patel, M. Chadha, Jungil Lee, P. C. Kim, S. Henderson, Ha Lam, J. Ernst, G. Vasseur, T. E. Browder, H. N. Nelson, J. K. Nelson, D. Riley, E. R.F. Hyatt, D. H. Miller, C. Qiao, R. Mountain, N. Copty, Shengfeng Yang, T. K. Nelson, M. Lattery, D. Cinabro, D. Fujino, T. Liu, Y. Kwon, J. Bartelt, B. C. Barish, J. J. O'Neill, P. Zadorozhny, F. Muheim, C. Bebek, X. Fu, J. Masui, M. Sapper, D. Z. Besson, K. Lingel, S. Nakanishi, E. H. Thorndike, A. P. Freyberger, George R. Kalbfleisch, B. Nemati, F. Morrow, Yurii V. Mukhin, D. Acosta, D. F. Cowen, Yuichi Kubota, Anders Ryd, M. Athanas, P. Skubic, Daniel Johnson, M. Daoudi, D. Coppage, Maurice Garcia-Sciveres, Vivek Jain, M. L. Kelly, J. P. Alexander, M.A. Palmer, Richard Wilson, J. Snow, D. L. Kreinick, S. W. Gray, K. K. Gan, D. N. Brown, D. G. Cassel, P. N. Wang, Y. Skovpen, S. Sanghera, G. C. Moneti, K. Cho, R. Stephens, J. S. Miller, C. M. Daubenmier, S. Playfer, S. E. Csorna, I. P.J. Shipsey, M. Ogg, M. Procario, N. B. Mistry, K. Honscheid, R. Davis, George D Gollin, S. Roberts, G. Zhu, Ryszard Stroynowski, Alice Bean, M. Battle, B. I. Eisenstein, C. D. Jones, E. I. Shibata, H. P. Paar, R. Fulton, P. Rankin, M. Thulasidas, N. Hancock, K. Kinoshita, R. Kutschke, J. Mevissen, N. Kwak, S. Salman, J. Kandaswamy, Chunjie Wang, Michael Wood, H. Yamamoto, Marina Artuso, M. Goldberg, J. Urheim, S. Menary, E. Nordberg, Jeffrey Richman, Dave Britton, Jon J Thaler, R. L. McIlwain, Kenneth Bloom, D. Peterson, G. S. Ludwig, M. Sung, V. Shelkov, S. Schrenk, N. Katayama, D. S. Akerib, W. R. Ross, G. Eigen, I. Volobouev, H. Tajima, D. Perticone, Sheldon Stone, V. Savinov, Paul Avery, Daniel Schmidt, G. Crawford, C. R. Sun, W. T. Ford, H. Kagan, R. D. Kass, R. Balest, R. J. Morrison, Mats A Selen, A. J. Sadoff, Yoram Rozen, F. Würthwein, B. Geiser, M. Lohner, R. Kennett, B. Gittelman, I. J. Kim, Philip Baringer, P. S. Drell, Jorge Luis Rodriguez, M. Saulnier, S. Ball, R. Ehrlich, S. L. Jones, J. Dominick, D. Patton, Karl Berkelman, M. M. Zoeller, B. Ong, J. Fast, Christopher G. White, T. Miao, P. L. Wang, R. Ammar, H. Severini, S. Chan, K. W. Edwards, Z. Egyed, C. O'Grady, D. Sperka, T. Bergfeld, and G. Masek

Subjects
Nuclear physics, Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Life span, Electron–positron annihilation, media_common.quotation_subject, Charm (quantum number), Asymmetry, Measure (mathematics), media_common
Abstract

Using the CLEO II detector at CESR we observe 500 Λ l + pairs consistent with the semileptonic decay Λc+ → λ+ν We measure σ(e + e − → Λ + c X) · B(Λ + c → Λ l + ν l ) = 4.77±0.25±0.66 pb . Combining with the charm semileptonic width and the lifetime of the Λc we also obtain B(Λ+c → pK−π+). We find no evidence for Λ l + ν l final states in which there are additional Λ+c decay products. We measure the decay asymmetry parameter of Λ+c → Λe+νe to be αΛc = −0.89+0.17+0.09−0.11−0.05.

Published
1994

35. Studies of a double-sided silicon microstrip system with analog VLSI readout

Author

C. Liapis, D. Kaplan, E. McCliment, P. Skubic, P. Karchin, Michael Wood, George R. Kalbfleisch, J. Kuehler, Phillip Gutierrez, T. Vaughan, and J. Sinott

Subjects
Physics, Very-large-scale integration, Nuclear and High Energy Physics, business.industry, Detector, Tracking (particle physics), Angle of incidence (optics), Optoelectronics, Fermilab, Photonics, business, Instrumentation, Ohmic contact, Diode
Abstract

The tracking performance of a 0.64 cm square double-sided AC-coupled detector manufactured by Hamamatsu Photonics Inc. has been evaluated in a test beam of 227 GeV/c pions at Fermilab. The detector was fabricated with 50 μm pitch on the ohmic (n) side and 25 μm pitch on the diode (p) side. Readout pitch for both sides was 50 μm and was implemented with a Berkeley designed SVX-D IC/SRS/SDA sequencer system. Measurements were made of signal-to-noise, charge correlation characteristics and resolution vs. angle of incidence in the range from 0° to 60° with analog pulse height information. Measurements were made at room temperature, −12°C and −20°C.

Published
1994

36. Analysis of hadronic transitions inϒ(3S)decays

Author

M. Procario, D. Fujino, J. J. O'Neill, T. Liu, C. Bebek, B. Nemati, Yurii V. Mukhin, A. P. Freyberger, A. J. Weinstein, Z. Egyed, F. Morrow, D. Besson, George R. Kalbfleisch, H. N. Nelson, S. Salman, Michael Wood, F. Butler, I. P.J. Shipsey, J. Urheim, M. Daoudi, J. Snow, D. Sperka, Ruifang Wang, R. Malchow, R. Ehrlich, J. Mevissen, K. Cho, N. B. Mistry, J. Kandaswamy, D. Cinabro, John Yelton, D. Peterson, H. Tajima, Sheldon Stone, S. L. Jones, J. Dominick, Paul Avery, S. Patton, K. K. Gan, T. Skwarnicki, D. F. Cowen, H. Kagan, K. Lingel, M. Sivertz, S. Nakanishi, E. H. Thorndike, Daniela Bortoletto, N. Copty, P. C. Kim, S. Henderson, M. Goldberg, W. R. Ross, D. Acosta, G. C. Moneti, Daniel Johnson, D. Perticone, M. Modesitt, V. Savinov, K. Sparks, P. L. Wang, H. Worden, D. Coppage, J. P. Alexander, Yoram Rozen, F. Würthwein, C. M. Daubenmier, Y. I. Skovpen, R. J. Morrison, Mats A Selen, Ryszard Stroynowski, M. Lambrecht, T. K. Nelson, Philip Baringer, Marina Artuso, D. M. Coffman, B. Ong, A. J. Sadoff, C. R. Sun, W. T. Ford, H. P. Paar, R. D. Kass, B. K. Heltsley, J. G. Smith, R. Fulton, S. Ball, R. Balest, D. He, P. Rankin, M. Sapper, D. L. Hartill, M. Chandha, T. E. Browder, J. S. Miller, M. Ogg, G. Zhu, J. Fast, D. Riley, R. S. Galik, R. Kutschke, Christopher G. White, D. L. Kreinick, Chunjie Wang, E. Nordberg, Daniel Schmidt, M. Thulasidas, R. Davis, S. F. Schaffner, J. Bartelt, G. S. Ludwig, S. Sanghera, P. Wilson, S. Roberts, R. Ammar, M. Battle, N. Hancock, M. L. Kelly, H. Yamamoto, Paul Sheldon, Yuichi Kubota, G. Crawford, H. Severini, S. Chan, S. W. Gray, P. Skubic, K. Honscheid, Richard Wilson, C. O'Grady, M. M. Zoeller, T. Miao, N. Katayama, D. S. Akerib, G. Eigen, J. Whitmore, Jungil Lee, M. Sung, D. H. Miller, X. Fu, R. Stephens, S. E. Csorna, K. Kinoshita, E. I. Shibata, N. Kwak, S. Menary, R. L. McIlwain, F. Shen, S. Schrenk, F. Muheim, D. N. Brown, S. Playfer, M. S. Alam, J. Ernst, M. Lattery, Pu Wang, Karl Berkelman, Anders Ryd, M. Athanas, J. Gronberg, N. Horwitz, G. Masek, Juliet Ritchie Patterson, A. Bean, J. K. Nelson, S. Yang, Hubert Kroha, H. A. Cho, Ha Lam, J. D. Richman, R. Poling, C. R. Ng, Michael S. Witherell, G. Vasseur, B. C. Barish, C. D. Jones, Maurice Garcia-Sciveres, J. Masui, D. G. Cassel, Vivek Jain, P. S. Drell, Jorge Luis Rodriguez, M. Saulnier, R. Kennett, B. Gittelman, I. J. Kim, B. Geiser, and M. Lohner

Subjects
Physics, Particle physics, Angular distribution, ComputingMilieux_THECOMPUTINGPROFESSION, Meson, Stereochemistry, Branching fraction, Hadron
Abstract

Using the CLEO II detector, we have measured the branching fractions for [Upsilon](3[ital S])[r arrow][pi][pi][Upsilon](1[ital S]), [Upsilon](3[ital S])[r arrow][pi][pi][Upsilon](2[ital S]), and the cascade [Upsilon](3[ital S])[r arrow][Upsilon](2[ital S])+[ital X], [Upsilon](2[ital S])[r arrow][pi][sup +][pi][sup [minus]][Upsilon](1[ital S]), analyzing the exclusive mode where the daughter [Upsilon] state decays to a [ital e][sup +][ital e[minus]] or [mu][sup +][mu][sup [minus]] pair, as well as the inclusive [pi][sup +][pi][sup [minus]] transitions where the final [Upsilon] state decays into hadrons. Properties of the [pi][pi] system are analyzed. Searches for the cascade decay [Upsilon](3[ital S])[r arrow][pi][sup +][pi][sup [minus]][ital h][sub [ital b]], [ital h][sub [ital b]][r arrow][gamma][eta][sub [ital b]] and [Upsilon](3[ital S])[r arrow][pi][sup 0][ital h][sub [ital b]] were also performed.

Published
1994

37. Search for exclusive b → u transitions in hadronic decays of B mesons involving mesons

Author

D. Riley, J. Bartelt, B. Nemati, F. Morrow, M. S. Alam, P. N. Wang, Yuichi Kubota, H. Kagan, J. S. Miller, C. D. Jones, D. He, J. Gronberg, S. Nakanishi, C. M. Daubenmier, Richard Wilson, J. Ernst, R. Davis, J. Urheim, T. E. Browder, E. H. Thorndike, M. M. Zoeller, Ryszard Stroynowski, T. Liu, M. Lattery, N. Horwitz, M. Chadha, C. Bebek, M. Thulasidas, Maurice Garcia-Sciveres, G. Masek, Juliet Ritchie Patterson, R. J. Morrison, D. Coppage, D. H. Miller, P. L. Wang, M. Goldberg, A. P. Freyberger, J. P. Alexander, Mats A Selen, Y. Kwon, B. Geiser, T. Miao, A. J. Sadoff, M. L. Kelly, George R. Kalbfleisch, N. Kwak, D. Z. Besson, S. W. Gray, Jungil Lee, H. P. Paar, C. R. Sun, D. L. Kreinick, X. Fu, P. Rankin, D. Perticone, R. Fulton, M. Daoudi, W. T. Ford, J. Masui, V. Savinov, F. Butler, R. D. Kass, M. Modesitt, T. K. Nelson, R. Balest, W. R. Ross, P. Skubic, M. Lohner, Yoram Rozen, F. Würthwein, R. Malchow, John Yelton, S. Menary, M. Lambrecht, J. Snow, Z. Egyed, H. Yamamoto, R. L. McIlwain, Anders Ryd, M. Athanas, K. K. Gan, Y. Skovpen, R. Kennett, J. K. Nelson, Vivek Jain, D. Sperka, Chunjie Wang, B. Gittelman, J. J. Thaler, V. Shelkov, S. Schrenk, S. Yang, Philip Baringer, J. G. Smith, Sheldon Stone, T. Bergfeld, S. Roberts, R. Stephens, Paul Avery, S. Sanghera, P. Zadorozhny, F. Muheim, I. Volobouev, S. Ball, S. E. Csorna, R. Ammar, R. Mountain, E. Nordberg, Jeffrey Richman, Daniel Schmidt, I. J. Kim, Kenneth Bloom, M. Battle, G. C. Moneti, N. Hancock, M. Procario, H. Severini, S. Chan, B. Ong, M.A. Palmer, Ha Lam, D. Fujino, G. S. Ludwig, M. Sapper, D. N. Brown, K. Kinoshita, J. J. O'Neill, S. Playfer, N. Katayama, G. Wei, D. G. Cassel, G. Zhu, D. S. Akerib, E. I. Shibata, G. Vasseur, S. Salman, J. Fast, D. Payne, H. A. Cho, R. Wang, C. O'Grady, Michael Wood, Marina Artuso, G. Eigen, A. J. Weinstein, Yurii V. Mukhin, B. C. Barish, Christopher G. White, D. L. Hartill, H. N. Nelson, P. S. Drell, Karl Berkelman, T. Skwarnicki, R. Ehrlich, R. Poling, D. F. Cowen, Jorge Luis Rodriguez, G. Crawford, M. Saulnier, C. R. Ng, S. L. Jones, P. C. Kim, S. Henderson, M. Sung, Michael S. Witherell, I. P.J. Shipsey, J. Dominick, B. I. Eisenstein, D. M. Coffman, K. Lingel, Alice Bean, K. Cho, R. Kutschke, N. B. Mistry, B. K. Heltsley, H. Tajima, G. D. Gollin, J. Mevissen, N. Copty, J. Kandaswamy, D. Cinabro, S. Patton, D. Peterson, D. Acosta, Daniel Johnson, and K. Honscheid

Subjects
Physics, Nuclear physics, Hadronic decay, Nuclear and High Energy Physics, Particle physics, Meson, Hadron, Mass spectrum, Resonance, Elementary particle, B meson, Cornell Electron Storage Ring
Abstract

Using 1.16 × 106 B B events collected at the γ(4S) resonance by the CLEO Collaboration at the Cornell Electron Storage Ring (CESR), we have searched for decays of B mesons to exclusive two-body hadronic final states including a Ds+ or a D s ∗+ meson. We obtain the 90% confidence level upper limit β (B → D s (∗)+ π − + D s ∗ +p − + D s (∗)+ π 0 + D s (∗)+ η + D s (∗)+ p 0 + D s (∗)+ (ω) × β(D s + → φπ + ) −5 . We have also searched for the W-exchange decays, B 0 → D s (∗)− K (∗)+ .

Published
1993

38. Measurement of exclusiveΛcdecays with aΣ+in the final state

Author

M. Garcia-Sciveres, Vipul Jain, D. L. Hartill, S. Schrenk, N. Horwitz, M. Chadha, Ryszard Stroynowski, D. Fujino, T. K. Nelson, Daniel Schmidt, Z. Egyed, P. Rankin, J. Fast, G. Masek, Juliet Ritchie Patterson, N. Copty, R. Davis, M. M. Zoeller, Robert Wilson, Yoram Rozen, T. Miao, J. Urheim, M. Procario, Glen D. Crawford, M. Kelly, M. S. Alam, J. Mevissen, T. Liu, M. Modesitt, J. Kandaswamy, B. Nemati, Robert K. Kutschke, M. Battle, A. J.R. Weinstein, K. Sparks, Horst Severini, Philip Baringer, D. H. Miller, S. Menary, S. J. Patton, A. P. Freyberger, J. A. Ernst, George R. Kalbfleisch, N. Hancock, Y. Skovpen, S. Sanghera, Pu Wang, S. Ball, D. N. Brown, Darin Acosta, Cong Wang, Shengfeng Yang, David Sperka, Karl Berkelman, S. Roberts, D. Peterson, J. Whitmore, Hubert Kroha, Jungil Lee, M. Sapper, John E. Bartelt, P. L. Wang, D. F. Cowen, J. S. Miller, R. Ammar, R. Stephens, Anders Ryd, M. Athanas, D. Z. Besson, M. Thulasidas, S. E. Csorna, H. Tajima, P. S. Drell, K. K. Gan, Marina Artuso, T. Skwarnicki, J. Snow, M. Daoudi, S. Chan, N. Kwak, B. Ong, F. Butler, D. L. Kreinick, M. Saulnier, P. Wilson, K. Kinoshita, C. Bebek, John Yelton, T. E. Browder, P. C. Kim, G. Vasseur, D. G. Cassel, Yurii V. Mukhin, H. Kagan, J. Dominick, J. L. Rodriguez, V. Savinov, Frank Würthwein, H. A. Cho, S. Nakanishi, E. H. Thorndike, M. Goldberg, Alice Bean, G. C. Moneti, B. Geiser, K. Cho, S. Playfer, D. R. Johnson, D. Coppage, R. L. McIlwain, D. M. Coffman, N. B. Mistry, R. Ehrlich, C. R. Ng, J. P. Alexander, R. Poling, B. K. Heltsley, Ha Lam, F. Muheim, S.F. Schaffner, P. Skubic, F. Shen, Michael S. Witherell, H. Yamamoto, R. J. Morrison, Mats A Selen, M.K. Sung, M. Lohner, W. R. Ross, D. He, E. I. Shibata, J. D. Richman, A. J. Sadoff, J. J. O'Neill, S. L. Jones, Shawn W. Henderson, Sheldon Stone, D. Cinabro, X. Fu, Paul Avery, R. Kennett, N. Katayama, D. S. Akerib, M. Lattery, B. C. Barish, B. Gittelman, G. Eigen, I. J. Kim, J. Masui, R. Wang, D. Riley, Paul Sheldon, Yuichi Kubota, F. Morrow, R. L. Malchow, Christopher G. White, C. R. Sun, W. T. Ford, R. D. Kass, R. Balest, M. Ogg, G. Zhu, K. Lingel, M. Sivertz, D. Perticone, M. Lambrecht, H. Worden, I. P. J. Shipsey, S. Salman, Janice Nelson, C. D. Jones, Michael Wood, J. Gronberg, H. P. Paar, R. Fulton, E. Nordberg, G. S. Ludwig, S. W. Gray, C. O'Grady, H. N. Nelson, J. G. Smith, C. M. Daubenmier, Daniela Bortoletto, and K. Honscheid

Subjects
Physics, Crystallography, Particle decay, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hyperon, General Physics and Astronomy, Lambda baryon, Lambda, Omega baryon, Sigma baryon
Abstract

We have measured branching ratios for three [Lambda][sub [ital c]] decay modes that have a [Sigma][sup +] in the final state. Two of the observed decay modes, [Lambda][sub [ital c]][r arrow][Sigma][sup +][pi][sup 0] and [Lambda][sub [ital c]][sup +][r arrow][Sigma][sup +][omega], have no external [ital W]-emission amplitudes. Their branching ratios relative to the [ital pK][sup [minus]][pi][sup +] mode are 0.20[plus minus]0.03[plus minus]0.03 and 0.54[plus minus]0.13[plus minus]0.06, respectively. We have also significantly improved the measurement of the branching ratio for the previously observed decay mode [Lambda][sub [ital c]][sup +][r arrow][Sigma][sup +][pi][sup +][pi][sup [minus]]. We find its branching ratio relative to [ital pK][sup [minus]][pi][sup +] to be 0.74[plus minus]0.07[plus minus]0.09.

Published
1993

39. Measurements of exclusive semileptonic decays of D mesons

Author

Daniel Schmidt, Maurice Garcia-Sciveres, M. Sapper, R. J. Morrison, Mats A Selen, A. J. Sadoff, F. Butler, P. N. Wang, John Yelton, Ryszard Stroynowski, Y. Kwon, P. Rankin, D. H. Miller, S. Nakanishi, E. H. Thorndike, B. Nemati, Chunjie Wang, M. Daoudi, A. Bean, X. Fu, D. Riley, M. Procario, J. K. Nelson, D. Besson, R. Kennett, S. Yang, S. F. Schaffner, B. Gittelman, Harris Kagan, N. Kwak, Daniela Bortoletto, Ha Lam, Raymond Davis, D. Coppage, D. F. Cowen, J. J. O'Neill, N. Copty, I. J. Kim, J. Bartelt, J. P. Alexander, G. C. Moneti, K. Lingel, T. Skwarnicki, G. Vasseur, J. Urheim, N. Katayama, D. S. Akerib, D. M. Coffman, G. Eigen, S. Salman, D. G. Cassel, Michael Wood, R. Kass, R. Stephens, Yurii V. Mukhin, S. E. Csorna, P. C. Kim, S. Henderson, B. K. Heltsley, B. C. Barish, B. Geiser, Yuichi Kubota, M. Sung, H. Worden, M. Modesitt, P. L. Wang, E. I. Shibata, K. Kinoshita, R. Malchow, H. A. Cho, R. Wang, M. Lohner, I. P.J. Shipsey, K. K. Gan, M. M. Zoeller, D. Cinabro, D. N. Brown, D. L. Hartill, Karl Berkelman, K. Cho, N. B. Mistry, B. Ong, P. Wilson, J. G. Smith, S. Menary, R. L. McIlwain, P. S. Drell, S. Patton, R. Poling, M. Lambrecht, F. Shen, C. R. Ng, T. Miao, G. Crawford, C. D. Jones, Jorge Luis Rodriguez, M. Saulnier, M. S. Alam, V. Shelkov, S. Schrenk, Michael S. Witherell, M. Goldberg, Richard Wilson, D. Fujino, D. Acosta, A. J. Weinstein, Daniel Johnson, J. Fast, W. R. Ross, H. N. Nelson, D. He, R. Ammar, D. L. Kreinick, G. Masek, T. K. Nelson, Juliet Ritchie Patterson, H. Tajima, J. Gronberg, J. Masui, N. Horwitz, J. Ernst, T. E. Browder, J. Lee, M. L. Kelly, R. Fulton, I. Volobouev, M. Lattery, M. Chadha, C. R. Sun, H. Severini, S. Chan, S. W. Gray, M. Ogg, G. Zhu, S. Roberts, W. T. Ford, P. Zadorozhny, M. Battle, F. Muheim, Z. Egyed, H. P. Paar, R. Balest, K. Honscheid, Hubert Kroha, C. O'Grady, S. Playfer, R. Kutschke, D. Sperka, Vivek Jain, F. Morrow, Y. Skovpen, S. Sanghera, E. Nordberg, Jeffrey Richman, Anders Ryd, M. Athanas, J. Mevissen, G. S. Ludwig, N. Hancock, P. Skubic, Sheldon Stone, J. Kandaswamy, K. Sparks, Paul Avery, D. Peterson, Marina Artuso, C. White, H. Yamamoto, T. Liu, C. Bebek, A. P. Freyberger, George R. Kalbfleisch, J. Snow, C. M. Daubenmier, D. Perticone, V. Savinov, Yoram Rozen, F. Würthwein, Philip Baringer, S. Ball, J. S. Miller, M. Thulasidas, J. Whitmore, R. Ehrlich, S. L. Jones, and J. Dominick

Subjects
Semileptonic decay, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, D meson, Elementary particle, Cornell Electron Storage Ring
Abstract

Using a sample of integrated luminosity 1.68 fb−1 collected with the CLEO-II detector at the Cornell Electron Storage Ring, we measure the branching ratios for the dominant exclusive semileptonic decays D → K l ν and D → K ∗ l ν , using charged and neutral D mesons. We also make a precise measurement of the vector form factor for the decay D 0 → K − l + ν , using a sample of 2700 events.

Published
1993

40. Study ofD0decays intoK¯0andK¯*0

Author

J. S. Miller, T. E. Browder, P. Rubin, M. Thulasidas, G. C. Moneti, P. N. Wang, P. Wilson, Maurice Garcia-Sciveres, R. Ehrlich, Daniel Schmidt, J. Urheim, S. L. Jones, D. Perticone, Ryszard Stroynowski, V. Savinov, Yoram Rozen, F. Würthwein, E. I. Shibata, R. Ballest, Philip Baringer, J. Mevissen, J. Kandaswamy, D. Riley, P. Rankin, J. Whitmore, Jungil Lee, H. Yamamoto, K. Honscheid, P. Skubic, A. Bean, V. Romero, J. K. Nelson, J. J. O'Neill, M. Worris, D. Cinabro, G. Crawford, S. Yang, Chunjie Wang, M. Sapper, D. Peterson, M. Daoudi, S. F. Schaffner, J. Bartelt, B. Nemati, F. Morrow, G. Masek, C. R. Sun, W. T. Ford, S. Patton, R. Kennett, D. Besson, F. Butler, C. D. Jones, P. L. Wang, R. D. Kass, R. Stephens, D. G. Cassel, K. K. Gan, R. Davis, R. Malchow, Y. Skovpen, T. K. Nelson, B. Gittelman, I. P.J. Shipsey, John Yelton, Juliet Ritchie Patterson, D. Acosta, H. Kagan, I. J. Kim, B. Ong, K. Sparks, T. Liu, Daniel Johnson, Paul Sheldon, Yuichi Kubota, D. F. Cowen, Sheldon Stone, C. Bebek, S. Sanghera, Paul Avery, R. J. Morrison, Christopher G. White, M. Goldberg, Daniela Bortoletto, N. Copty, Mats A Selen, S. Ball, D. L. Kreinick, A. J. Sadoff, A. P. Freyberger, N. Hancock, Richard Wilson, H. Tajima, R. Ammar, Z. Egyed, J. Dominick, S. Roberts, D. Sperka, B. Geiser, George R. Kalbfleisch, M. Lohner, H. Severini, S. Chan, M. Battle, Ha Lam, M. Ogg, G. Zhu, J. Snow, P. S. Drell, D. M. Coffman, B. K. Heltsley, M. M. Zoeller, M. Saulnier, B. C. Barish, T. Skwarnicki, J. Masui, P. C. Kim, S. Henderson, T. Miao, H. P. Paar, R. Fulton, Hubert Kroha, Vivek Jain, H. A. Cho, R. Wang, R. Kutschke, D. L. Hartill, R. Poling, C. R. Ng, E. Nordberg, Jeffrey Richman, Michael S. Witherell, N. Katayama, D. S. Akerib, G. S. Ludwig, G. Eigen, K. Lingel, M. Sivertz, Marina Artuso, N. Kwak, S. Nakanishi, E. H. Thorndike, H. Worden, D. Coppage, J. P. Alexander, R. Rodriquez, R. S. Galik, M. Lambrecht, C. O'Grady, A. J. Weinstein, H. N. Nelson, S. Menary, Karl Berkelman, R. L. McIlwain, A. V. Barnes, S. Schrenk, J. Gronberg, N. Horwitz, M. Chadha, F. Muheim, D. N. Brown, S. Playfer, M. Athanas, S. E. Csorna, K. Kinoshita, M. S. Alam, J. Ernst, M. Lattery, D. H. Miller, N. B. Mistry, W. R. Ross, M. Procario, X. Fu, M. Sung, Michael Wood, M. Modesitt, J. G. Smith, M. L. Kelly, and S. W. Gray

Subjects
Physics, Particle physics, Particle decay, Antiparticle, Meson, Branching fraction, Hadron
Abstract

Using the CLEO II detector at CESR we have studied [ital D][sup 0] decays into final states with a [ital [bar K]] [sup 0] or [ital [bar K]] [sup *0], and have measured branching ratios for the decay modes [ital D][sup 0][r arrow]([ital [bar K]] [sup 0]/[ital [bar K]] [sup *0])[pi][sup 0],[eta],[eta][prime]. These results are compared with predictions of various charm decay models, and contributions of final-state interactions are discussed.

Published
1993

41. Study of the decaysΛc+→Ξ0K+,Λc+→Σ+K+K−, andΛc+→Ξ−K+π+

Author

H. A. Cho, K. Lingel, D. Cinabro, R. Kennett, M. Sivertz, B. Gittelman, D. Perticone, P. S. Drell, M. Saulnier, P. Wilson, I. J. Kim, M. Lambrecht, G. Vasseur, C. R. Ng, I. P. J. Shipsey, B. Geiser, M. Lohner, J. J. O'Neill, N. Hancock, M. S. Alam, Y. Skovpen, Michael S. Witherell, M.K. Sung, R. L. Malchow, Christopher G. White, D. G. Cassel, Yoram Rozen, D. He, H. Worden, S. Salman, Janice Nelson, C. D. Jones, Michael Wood, David Sperka, E. I. Shibata, Philip Baringer, Cong Wang, C. R. Sun, W. T. Ford, S. Menary, M. Garcia-Sciveres, F. Morrow, H. Yamamoto, S. Ball, M. Sapper, R. D. Kass, T. Liu, M. Modesitt, R. Poling, P. Skubic, John Yelton, R. Balest, Vipul Jain, Robert K. Kutschke, R. Wang, D. Z. Besson, R. Ammar, T. K. Nelson, P. L. Wang, S. Schrenk, D. M. Coffman, J. G. Smith, N. Kwak, S. Chan, C. M. Daubenmier, M. Daoudi, R. Davis, A. P. Freyberger, D. L. Hartill, J. S. Miller, B. K. Heltsley, Karl Berkelman, D. H. Miller, Ryszard Stroynowski, D. Fujino, M. Thulasidas, K. K. Gan, T. Skwarnicki, B. Ong, J. L. Rodriguez, George R. Kalbfleisch, H. Tajima, Shawn W. Henderson, Daniel Schmidt, John E. Bartelt, F. Muheim, Frank Würthwein, P. C. Kim, S. Nakanishi, E. H. Thorndike, J. Fast, M. M. Zoeller, R. L. McIlwain, K. Cho, X. Fu, P. Rankin, C. O'Grady, M. Goldberg, D. Coppage, J. Urheim, S. Sanghera, D. L. Kreinick, C. Bebek, G. C. Moneti, Pu Wang, N. B. Mistry, Darin Acosta, J. P. Alexander, N. Copty, Robert Wilson, V. Romero, T. E. Browder, N. Horwitz, J. Whitmore, Jungil Lee, M. Chadha, R. Ehrlich, S.F. Schaffner, M. Kelly, J. Mevissen, J. Snow, J. Dominick, Sheldon Stone, B. Nemati, S. L. Jones, Z. Egyed, Paul Avery, S. W. Gray, Yurii V. Mukhin, V. Savinov, J. Kandaswamy, D. N. Brown, Glen D. Crawford, K. Sparks, H. N. Nelson, H. Kagan, S. J. Patton, M. Worris, S. Playfer, M. Battle, Shengfeng Yang, Anders Ryd, M. Athanas, J. A. Ernst, M. Ogg, G. Zhu, T. Miao, R. Stephens, S. E. Csorna, A. J.R. Weinstein, D. R. Johnson, R. J. Morrison, Mats A Selen, D. F. Cowen, Marina Artuso, A. J. Sadoff, J. Gronberg, F. Butler, H. P. Paar, R. Fulton, D. Peterson, K. Kinoshita, E. Nordberg, W. R. Ross, G. S. Ludwig, Daniela Bortoletto, N. Katayama, D. S. Akerib, G. Eigen, G. Masek, Juliet Ritchie Patterson, M. Procario, Horst Severini, Hubert Kroha, Alice Bean, K. Honscheid, S. Roberts, Ha Lam, D. Riley, J. D. Richman, M. Lattery, B. C. Barish, J. Masui, Paul Sheldon, and Yuichi Kubota

Subjects
Physics, Statistics::Theory, Statistics::Applications, Branching fraction, Hadron, General Physics and Astronomy, Xi baryon, Sigma baryon, Charmed baryons, Combinatorics, Particle decay, High Energy Physics::Experiment, Cornell Electron Storage Ring, Atomic physics
Abstract

We report the measurement of new modes of the charmed baryon ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$ using data recorded by the CLEO II detector at the Cornell Electron Storage Ring. We find branching ratios, relative to ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathit{pK}}^{\mathrm{\ensuremath{-}}}$${\mathrm{\ensuremath{\pi}}}^{+}$, of 0.070\ifmmode\pm\else\textpm\fi{}0.011\ifmmode\pm\else\textpm\fi{}0.011 for ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\Sigma}}}^{+}$${\mathit{K}}^{+}$${\mathit{K}}^{\mathrm{\ensuremath{-}}}$, 0.069\ifmmode\pm\else\textpm\fi{}0.023\ifmmode\pm\else\textpm\fi{}0.016 for ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}\ensuremath{\Sigma}\ensuremath{\varphi}, 0.078\ifmmode\pm\else\textpm\fi{}0.013\ifmmode\pm\else\textpm\fi{}0.013 for ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\Xi}}}^{0}$${\mathit{K}}^{+}$, and 0.053\ifmmode\pm\else\textpm\fi{}0.016\ifmmode\pm\else\textpm\fi{}0.010 for ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\Xi}}}^{\mathrm{*}0}$${\mathit{K}}^{+}$. These measurements indicate that W-exchange diagrams contribute to ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$ decay. We have also made a new measurement of the previously found mode ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\Xi}}}^{\mathrm{\ensuremath{-}}}$${\mathit{K}}^{+}$${\mathrm{\ensuremath{\pi}}}^{+}$.

Published
1993

42. Measurement of theD→ππ branching fractions

Author

H. A. Cho, David Sperka, Yoram Rozen, B. Geiser, T. Liu, M. Modesitt, D. L. Hartill, Sheldon Stone, Philip Baringer, Z. Egyed, A. P. Freyberger, George R. Kalbfleisch, Daniel Schmidt, Paul Avery, C. R. Ng, J. Snow, J. Fast, D. R. Johnson, Michael S. Witherell, S. Ball, M.K. Sung, K. Honscheid, R. Davis, N. Copty, N. Kwak, S. Nakanishi, E. H. Thorndike, B. Ong, C. O'Grady, M. Lohner, J. J. O'Neill, D. Riley, G. Masek, Shengfeng Yang, Juliet Ritchie Patterson, F. Muheim, D. Coppage, R. L. Malchow, Christopher G. White, J. S. Miller, J. P. Alexander, Glen D. Crawford, M. Thulasidas, D. F. Cowen, D. Cinabro, R. Kennett, D. N. Brown, H. N. Nelson, M. Procario, H. Kagan, M. Garcia-Sciveres, Robert K. Kutschke, Vipul Jain, D. G. Cassel, B. Gittelman, C. R. Sun, W. T. Ford, Horst Severini, R. L. McIlwain, R. D. Kass, F. Shen, S. Playfer, Ryszard Stroynowski, D. Fujino, R. Balest, P. L. Wang, I. J. Kim, H. Yamamoto, G. Vasseur, R. Ammar, Hubert Kroha, R. Ehrlich, D. Z. Besson, Karl Berkelman, P. Rankin, R. Poling, Yurii V. Mukhin, Paul Sheldon, Yuichi Kubota, R. J. Morrison, Mats A Selen, S. Chan, S. L. Jones, R. Wang, N. Katayama, D. S. Akerib, K. Lingel, A. J. Sadoff, M. Sivertz, G. Eigen, M. Daoudi, P. Skubic, H. Worden, Daniela Bortoletto, Cong Wang, Alice Bean, M. S. Alam, P. S. Drell, M. Ogg, G. Zhu, Shawn W. Henderson, D. L. Kreinick, C. Bebek, John E. Bartelt, S. Menary, John Yelton, X. Fu, M. Saulnier, N. Horwitz, M. Chadha, T. E. Browder, K. K. Gan, P. Wilson, T. Skwarnicki, J. Gronberg, H. P. Paar, R. Fulton, H. Tajima, J. Dominick, P. C. Kim, V. Savinov, M. Goldberg, Anders Ryd, M. Athanas, G. C. Moneti, S.F. Schaffner, C. M. Daubenmeir, E. Nordberg, G. S. Ludwig, R. Stephens, S. E. Csorna, F. Morrow, F. Butler, Robert Wilson, K. Kinoshita, K. Sparks, S. J. Patton, J. L. Rodriguez, Marina Artuso, D. M. Coffman, B. K. Heltsley, D. H. Miller, Frank Würthwein, K. Cho, N. B. Mistry, J. Urheim, M. Kelly, J. Mevissen, J. Kandaswamy, B. Nemati, J. A. Ernst, D. Peterson, M. Battle, A. J.R. Weinstein, S. Schrenk, T. K. Nelson, M. M. Zoeller, T. Miao, N. Hancock, Y. Skovpen, M. Sapper, W. R. Ross, Ha Lam, J. D. Richman, M. Lattery, B. C. Barish, S. Roberts, J. Masui, D. Perticone, M. Lambrecht, I. P. J. Shipsey, S. Salman, Janice Nelson, C. D. Jones, Michael Wood, D. He, E. I. Shibata, J. G. Smith, S. W. Gray, S. Sanghera, Pu Wang, Darin Acosta, J. Whitmore, and Jungil Lee

Subjects
Physics, Hadronic decay, Crystallography, Particle decay, Particle physics, Particle properties, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Isospin, General Physics and Astronomy, Relative phase, Cornell Electron Storage Ring
Abstract

Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for [ital D][sup 0][r arrow][pi][sup +][pi][sup [minus]], and we present the first measurements of [ital D][sup 0][r arrow][pi][sup 0][pi][sup 0] and of [ital D][sup +][r arrow][pi][sup +][pi][sup 0], which is due to an isospin changing [Delta][ital I]=3/2 transition. From these data we extract the ratio of isospin amplitudes [vert bar][ital A][sub 2]/[ital A][sub 0][vert bar], and the cosine of the relative phase [delta]=[delta][sub 2][minus][delta][sub 0] between these amplitudes, for [ital D][r arrow][pi][pi] decays. Unlike the situation in kaon decay where [ital A][sub 2] is strongly suppressed, we find [vert bar][ital A][sub 2]/[ital A][sub 0][vert bar]=0.72[plus minus]0.13[plus minus]0.11 and cos[delta]=0.14[plus minus]0.13[plus minus]0.09.

Published
1993

43. Evidence for penguin-diagram decays: First observation ofB→K*(892)γ

Author

T. Liu, M. Modesitt, Robert K. Kutschke, Daniela Bortoletto, G. Masek, J. Gronberg, A. P. Freyberger, Karl Berkelman, George R. Kalbfleisch, Juliet Ritchie Patterson, H. P. Paar, R. Fulton, T. K. Nelson, M. Procario, H. Yamamoto, D. G. Cassel, J. Snow, J. Whitmore, Jungil Lee, Yoram Rozen, F. Muheim, S. Schrenk, D. L. Kreinick, C. Bebek, M. Daubenmeir, Horst Severini, E. Nordberg, B. Ong, R. Wang, R. Poling, Cong Wang, Philip Baringer, T. E. Browder, N. Kwak, M. M. Zoeller, N. Horwitz, M. Chadha, G. S. Ludwig, Hubert Kroha, S. Nakanishi, E. H. Thorndike, M. Garcia-Sciveres, C. O'Grady, Shawn W. Henderson, John Yelton, S. Ball, J. Dominick, Vipul Jain, P. S. Drell, J. Urheim, D. Coppage, X. Fu, D. L. Hartill, Daniel Schmidt, V. Savinov, D. R. Johnson, J. P. Alexander, Yurii V. Mukhin, H. N. Nelson, Ryszard Stroynowski, M. Saulnier, J. Fast, N. Copty, P. Wilson, R. Davis, D. Fujino, K. K. Gan, T. Skwarnicki, B. Nemati, R. L. McIlwain, D. Cinabro, R. Ehrlich, F. Shen, T. Miao, P. Rankin, Glen D. Crawford, Anders Ryd, R. Kennett, M. Athanas, M. Battle, A. J.R. Weinstein, P. C. Kim, B. Gittelman, H. Kagan, S. L. Jones, H. A. Cho, D. Z. Besson, M. Daoudi, I. J. Kim, M. Goldberg, David Sperka, S. Playfer, Z. Egyed, N. Hancock, K. Lingel, M. Sivertz, Y. Skovpen, C. R. Ng, G. C. Moneti, K. Honscheid, R. J. Morrison, Mats A Selen, A. J. Sadoff, J. S. Miller, Michael S. Witherell, M.K. Sung, G. Vasseur, H. Tajima, S.F. Schaffner, M. Thulasidas, M. Sapper, B. Geiser, M. Kelly, Robert Wilson, M. Lohner, P. Skubic, Shengfeng Yang, M. S. Alam, J. J. O'Neill, H. Worden, S. Sanghera, Pu Wang, D. M. Coffman, K. Sparks, Darin Acosta, S. J. Patton, J. Mevissen, D. F. Cowen, M. Ogg, G. Zhu, D. He, E. I. Shibata, B. K. Heltsley, Marina Artuso, F. Morrow, J. Kandaswamy, P. L. Wang, D. Perticone, Alice Bean, M. Lambrecht, J. A. Ernst, I. P. J. Shipsey, D. Peterson, W. R. Ross, S. Salman, Janice Nelson, C. D. Jones, Michael Wood, J. L. Rodriguez, N. Katayama, Frank Würthwein, D. S. Akerib, K. Cho, G. Eigen, N. B. Mistry, D. N. Brown, D. H. Miller, J. G. Smith, R. Stephens, S. E. Csorna, F. Butler, K. Kinoshita, S. W. Gray, R. Ammar, S. Chan, S. Menary, D. Riley, Paul Sheldon, Yuichi Kubota, Sheldon Stone, Paul Avery, R. L. Malchow, Christopher G. White, C. R. Sun, W. T. Ford, R. D. Kass, R. Balest, John E. Bartelt, Ha Lam, J. D. Richman, M. Lattery, B. C. Barish, S. Roberts, and J. Masui

Subjects
Physics, Combinatorics, Particle physics, Particle decay, Meson, Particle model, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, General Physics and Astronomy, Penguin diagram, B meson
Abstract

We have observed the decays [ital B][sup 0][r arrow][ital K][sup *](892)[sup 0][gamma] and [ital B][sup [minus]][r arrow][ital K][sup *](892)[sup [minus]][gamma], which are evidence for the quark-level process [ital b][r arrow][ital s][gamma]. The average branching fraction is (4.5[plus minus]1.5[plus minus]0.9)[times]10[sup [minus]5]. This value is consistent with standard model predictions from electromagnetic penguin diagrams.

Published
1993

44. Limit on the tau neutrino mass

Author

D. Riley, D. H. Miller, Yurii V. Mukhin, D. N. Brown, James G. Smith, Z. Egyed, E. I. Shibata, N. Kwak, F. Muheim, R. Stephens, S. E. Csorna, Paul Sheldon, Yuichi Kubota, D. L. Hartill, Daniel Schmidt, F. Butler, J. R. Patterson, S. Roberts, K. Lingel, M. Sivertz, D. M. Coffman, S. Nakanishi, E. H. Thorndike, N. Copty, K. Kinoshita, M. Garcia-Sciveres, J. Urheim, Harris Kagan, S. W. Gray, R. L. McIlwain, Vipul Jain, J. S. Miller, Glen D. Crawford, P. L. Wang, B. Ong, B. Geiser, D. Coppage, G. Masek, A. V. Barnes, J. P. Alexander, D. G. Cassel, Sheldon Stone, Robert Wilson, D. L. Kreinick, C. Bebek, M. Thulasidas, Paul Avery, N. Horwitz, B. Nemati, M. Chadha, M. Lohner, Cong Wang, H. Worden, Ryszard Stroynowski, D. Fujino, J. Masui, T. E. Browder, S. Menary, Shawn W. Henderson, P. Baringer, S. Sanghera, Pu Wang, M. Battle, J. L. Rodriguez, N. Hancock, J. J. O'Neill, Raymond Davis, John Yelton, Y. Skovpen, Frank Würthwein, H. Tajima, Darin Acosta, A. J.R. Weinstein, N. Katayama, J. Dominick, R. Poling, K. Sparks, S. J. Patton, P. Rubin, R. L. Malchow, Christopher G. White, D. S. Akerib, D. Cinabro, K. Cho, R. Kennett, C. R. Ng, R. Ehrlich, P. Rankin, X. Fu, N. B. Mistry, B. Gittelman, S. Playfer, V. Savinov, G. Eigen, M. Procario, C. O'Grady, C. R. Sun, W. T. Ford, D. He, R. S. Galik, M. Worris, M. Sapper, K. K. Gan, S. L. Jones, Horst Severini, Barry C. Barish, R. D. Kass, R. J. Morrison, Mats A Selen, R. Balest, M. Athanas, I. J. Kim, W. R. Ross, Marina Artuso, A. J. Sadoff, F. Morrow, H. N. Nelson, D. Z. Besson, M. Daoudi, R. Ammar, M. S. Alam, V. Romero, J. Whitmore, Jungil Lee, S. Schrenk, David Sperka, D. R. Johnson, Ha Lam, J. D. Richman, S. Chan, H. Yamamoto, Yoram Rozen, Hubert Kroha, T. K. Nelson, H. A. Cho, J. Gronberg, R. Wang, Ian Shipsey, John E. Bartelt, M. Kelly, J. Mevissen, H. P. Paar, R. Fulton, T. Liu, M. Modesitt, P. S. Drell, Alice Bean, Shengfeng Yang, M. Lattery, S. Ball, J. Kandaswamy, M. M. Zoeller, Robert K. Kutschke, T. Miao, D. F. Cowen, J. A. Ernst, A. P. Freyberger, George R. Kalbfleisch, M. Saulnier, P. Wilson, Karl Berkelman, E. Nordberg, G. Vasseur, D. Peterson, Michael S. Witherell, M.K. Sung, G. S. Ludwig, Brian Heltsley, J. Snow, P. Skubic, M. Ogg, G. Zhu, T. Skwarnicki, P. C. Kim, M. Goldberg, G. C. Moneti, S.F. Schaffner, Daniela Bortoletto, D. Perticone, M. Lambrecht, Janice Nelson, C. D. Jones, Michael Wood, and K. Honscheid

Subjects
Physics, Massless particle, Particle physics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Computer Science::Information Retrieval, Tau neutrino, General Physics and Astronomy, Elementary particle, Neutrino, Calculation methods, Lepton
Abstract

A limit on the tau neutrino mass [ital M][sub [nu][tau]] is obtained from a study of tau decays in the reaction [ital e][sup +][ital e[minus]][r arrow][tau][sup +][tau][sup [minus]] at center-of-mass energies [similar to]10.6 GeV. The result is based on an end-point analysis of the invariant mass spectrum of the decay products in the decay modes [tau][sup [minus]][r arrow]3[ital h][sup [minus]]2[ital h][sup +][nu][sub [tau]] and [tau][sup [minus]][r arrow]2[ital h][sup [minus]][ital h+]2[pi][sup 0][nu][sub [tau]]. The data sample used in this analysis contains 1.77[times]10[sup 6] tau pairs, corresponding to an integrated luminosity of 1.92 fb[sup [minus]1], and is substantially larger than previous data samples used to place a limit on [ital M][sub [nu][tau]]. The limit obtained for both five-hadron modes together is 32.6 MeV at 95% C.L.

Published
1993

45. Experimental limits on heavy neutrinos in tritium beta decay

Author

George R. Kalbfleisch and Moustafa Bahran

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Electron, equipment and supplies, Kinetic energy, Beta decay, Nuclear physics, High Energy Physics::Experiment, Tritium, Neutrino, Heavy neutrino
Abstract

A search for a 17 keV neutrino kink in tritium beta decay has been made on a new sample of 430 million decays per keV at electron kinetic energies near 1.5 keV. The new sample contains 40% less wall background than our earlier one. This significantly reduces the wall background systematics. No 17 keV neutrino signal was observed. The 99% confidence level upper limit obtained for the mixing probability is 0.28%. The combined upper limit from both samples is 0.24% (99% CL). In addition, limits less than 0.5% (99% CL) are obtained for other heavy neutrino mass values between 13.5 and 17.5 keV.

Published
1993

46. Production and decay of the Ds1 (2536)+

Author

G. Masek, S. Nakanishi, Juliet Ritchie Patterson, E. H. Thorndike, K. Honscheid, M. Procario, W. R. Ross, D. Coppage, J. P. Alexander, C. R. Sun, W. T. Ford, I. P.J. Shipsey, J. S. Miller, Hubert Kroha, R. D. Kass, R. S. Galik, P. Rubin, M. Thulasidas, J. Masui, M. Worris, M. Ogg, G. Zhu, N. Katayama, Michael Wood, D. S. Akerib, C. O'Grady, A. J. Weinstein, M. Sapper, D. M. Coffman, H. A. Cho, R. Wang, T. K. Nelson, G. Eigen, B. K. Heltsley, H. N. Nelson, T. Skwarnicki, D. L. Hartill, R. Ehrlich, M. Daoudi, Vivek Jain, P. C. Kim, F. Butler, D. L. Kreinick, S. L. Jones, Maurice Garcia-Sciveres, S. Henderson, C. R. Ng, K. K. Gan, Y. Skovpen, B. Geiser, J. Mevissen, M. M. Zoeller, D. Perticone, V. Savinov, Michael S. Witherell, B. Nemati, F. Morrow, J. Kandaswamy, J. Urheim, Daniela Bortoletto, R. Malchow, K. Lingel, Yoram Rozen, F. Würthwein, M. Sivertz, N. Copty, J. Dominick, S. Roberts, R. Kutschke, Philip Baringer, John Yelton, M. L. Kelly, P. N. Wang, S. Ball, D. Besson, T. Miao, H. Worden, M. Battle, T. Liu, C. Bebek, D. Peterson, S. W. Gray, K. Sparks, D. G. Cassel, M. Modesitt, H. Tajima, H. Yamamoto, M. Lohner, M. Lambrecht, R. Ammar, A. P. Freyberger, Ryszard Stroynowski, H. P. Paar, R. Fulton, D. Cinabro, George R. Kalbfleisch, H. Severini, S. Chan, Ron Poling, Daniel Schmidt, S. Patton, J. G. Smith, Sheldon Stone, E. Nordberg, Jeffrey Richman, D. Acosta, Richard Wilson, Paul Avery, Daniel Johnson, G. S. Ludwig, P. Rankin, K. Cho, Marina Artuso, N. B. Mistry, J. Snow, Z. Egyed, D. Riley, J. J. O'Neill, Chunjie Wang, S. F. Schaffner, P. S. Drell, J. Bartelt, Paul Sheldon, Yuichi Kubota, Jorge Luis Rodriguez, D. F. Cowen, G. Crawford, M. Saulnier, S. Sanghera, A. Bean, D. Sperka, N. Hancock, R. Kennett, H. Kagan, B. Gittelman, V. Romero, J. K. Nelson, I. J. Kim, S. Yang, R. Davis, R. J. Morrison, Mats A Selen, A. J. Sadoff, Christopher G. White, P. L. Wang, M. Athanas, J. Gronberg, N. Horwitz, M. Chadha, Karl Berkelman, D. H. Miller, X. Fu, M. Sung, N. Kwak, R. Stephens, S. E. Csorna, C. D. Jones, S. Menary, K. Kinoshita, R. L. McIlwain, B. Ong, M. Goldberg, A. V. Barnes, S. Schrenk, Ha Lam, M. S. Alam, J. Whitmore, Jungil Lee, M. Lattery, G. Vasseur, F. Muheim, D. N. Brown, S. Playfer, B. C. Barish, G. C. Moneti, E. I. Shibata, R. Ballest, T. E. Browder, P. Wilson, and P. Skubic

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Electron–positron annihilation, Fragmentation function, Parity (physics), Atomic physics, Helicity
Abstract

Using the CLEO-II detector at CESR, we have observed the Ds1(2536)+ in the decay modes D s1 + →D ∗0 K + and D ∗+ K S + , and measured its fragmentation and production ratios. Using the helicity angle distribution of the daugter D ∗0 , we obtain new evidence for the assignment of 1+ for the spin and parity of the Ds1+. We also set upper limits on the decays D s1 + →D s ∗+ λ, D 0 K + and D+Ks0.

Published
1993

47. Tau decays with one charged particle plus multipleπ0’s

Author

J. Urheim, M. Garcia-Sciveres, B. Nemati, Vipul Jain, N. Hancock, Y. Skovpen, M. Battle, Yoram Rozen, A. J.R. Weinstein, Paul Sheldon, Yuichi Kubota, Ryszard Stroynowski, R. Stephens, M. Sapper, Philip Baringer, S. E. Csorna, P. Rankin, F. Butler, M. Worris, D. Perticone, S. Ball, Robert K. Kutschke, Sheldon Stone, Paul Avery, M. Lambrecht, Shengfeng Yang, K. Kinoshita, R. Ammar, D. F. Cowen, D. He, S. Schrenk, E. I. Shibata, D. R. Johnson, J. Gronberg, W. M. Yao, I. P. J. Shipsey, Karl Berkelman, N. Kwak, Ha Lam, S. Chan, H. P. Paar, R. Fulton, J. D. Richman, M. M. Zoeller, R. Ehrlich, B. Ong, John E. Bartelt, M. Athanas, Janice Nelson, C. D. Jones, Michael Wood, M. Lattery, B. C. Barish, M. Kelly, J. Mevissen, Shawn W. Henderson, X. Fu, D. M. Coffman, B. K. Heltsley, D. H. Miller, J. Kandaswamy, R. Davis, T. Miao, D. Z. Besson, M. Daoudi, Yurii V. Mukhin, S. Sanghera, S. L. Jones, Pu Wang, Darin Acosta, J. Whitmore, Jungil Lee, R. L. McIlwain, Robert Wilson, E. Nordberg, S. Roberts, R. L. Malchow, S. Menary, G. S. Ludwig, J. A. Ernst, A. V. Barnes, Christopher G. White, K. Sparks, S. J. Patton, David Sperka, K. Lingel, M. Sivertz, C. R. Sun, W. T. Ford, R. D. Kass, H. Yamamoto, R. Balest, D. Peterson, J. S. Miller, G. Masek, J. Masui, P. Rubin, Juliet Ritchie Patterson, M. S. Alam, Marina Artuso, S. W. Gray, M. Thulasidas, H. Worden, F. Morrow, R. Wang, F. Muheim, G. Vasseur, D. L. Kreinick, C. Bebek, M. Procario, W. R. Ross, K. Honscheid, H. Tajima, T. E. Browder, Horst Severini, P. L. Wang, J. G. Smith, J. Dominick, P. Skubic, K. K. Gan, T. Skwarnicki, V. Savinov, C. O'Grady, Hubert Kroha, E. H. Thorndike, P. C. Kim, H. A. Cho, M. Goldberg, D. N. Brown, H. N. Nelson, D. Coppage, N. Horwitz, C. R. Ng, G. C. Moneti, J. P. Alexander, Michael S. Witherell, M.K. Sung, S.F. Schaffner, M. Chadha, Alice Bean, R. S. Galik, Z. Egyed, M. Ogg, G. Zhu, N. Katayama, J. L. Rodriguez, D. S. Akerib, G. Eigen, Frank Würthwein, K. Cho, N. B. Mistry, T. Liu, M. Modesitt, A. P. Freyberger, George R. Kalbfleisch, J. Snow, P. S. Drell, M. Saulnier, P. Wilson, D. Cinabro, R. Kennett, B. Gittelman, Cong Wang, Daniela Bortoletto, John Yelton, I. J. Kim, H. Kagan, V. Romero, S. Playfer, B. Geiser, R. J. Morrison, Mats A Selen, D. G. Cassel, A. J. Sadoff, M. Lohner, R. Poling, D. L. Hartill, J. J. O'Neill, Daniel Schmidt, N. Copty, Glen D. Crawford, and D. Riley

Subjects
Physics, Particle decay, Particle physics, Branching fraction, Stereochemistry, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, General Physics and Astronomy, Cornell Electron Storage Ring, Gamma detection, Calculation methods, Charged particle
Abstract

With the CLEO-II detector at the Cornell Electron Storage Ring, we have measured branching fractions for tau lepton decay into one-prong final states with multiple [pi][sup 0]'s [ital B][sub [ital h][ital n][pi]][sup 0], normalized to the branching fraction for tau decay into one charged particle and a single [pi][sup 0]. We find [ital B][sub [ital h]2[pi]][sup 0]/[ital B][sub [ital h][pi]][sup 0]=0.345[plus minus]0.006[plus minus]0.016, [ital B][sub [ital h]3[pi]][sup 0]/[ital B][sub [ital h][pi]][sup 0]=0.041 [plus minus]0.003[plus minus]0.005, and [ital B][sub [ital h]4[pi]][sup 0]/[ital B][sub [ital h][pi]][sup 0]=0.006[plus minus]0.002[plus minus]0.002.

Published
1993

48. β-decay end point and heavy neutrino searches

Author

George R. Kalbfleisch and Moustafa Bahran

Subjects
Nuclear physics, Massless particle, Physics, Particle physics, Elementary particle, Fermion, Neutrino, Particle identification, Energy (signal processing), Radioactive decay, Lepton
Abstract

We carefully consider the relation between the $\ensuremath{\beta}$-decay end point and heavy neutrino mixing relative to the least ${\ensuremath{\chi}}^{2}$ fitting procedure. We examine the 1991 experimental results of Hime and Jelley by considering variations due to end-point energy, radiative corrections, and spectrum pileup. We show that their result can be made consistent with the null hypothesis within 3 standard deviations. From consideration of end-point effects we conclude that the spectral region very near to the end point is questionable at best and should be ignored in the analysis of the data. These findings apply to any search for heavy neutrino mixing near the end point of $\ensuremath{\beta}$ decay.

Published
1993

49. Lepton asymmetry measurements inB¯→D*l−ν¯land implications forV-Aand the form factors

Author

R. Ammar, E. H. Thorndike, R. Ehrlich, D. Coppage, J. P. Alexander, Sheldon Stone, Paul Avery, D. F. Cowen, S. Menary, M. Garcia-Sciveres, S. Sanghera, Pu Wang, Darin Acosta, S. Roberts, F. Muheim, R. S. Galik, D. L. Kreinick, W. M. Yao, Vipul Jain, J. Urheim, C. Bebek, Shawn W. Henderson, K. Lingel, M. Sivertz, B. Nemati, M. S. Alam, S. W. Gray, Ryszard Stroynowski, Yoram Rozen, T. Liu, Ha Lam, X. Fu, E. I. Shibata, J. D. Richman, D. H. Miller, S. Schrenk, David Sperka, T. E. Browder, B. Ong, H. Worden, M. Modesitt, P. Rankin, Philip Baringer, S. Ball, C. R. Ng, Michael S. Witherell, M. Battle, A. J.R. Weinstein, M. Lattery, N. Katayama, M.K. Sung, B. C. Barish, J. Dominick, John E. Bartelt, A. P. Freyberger, J. Whitmore, Jungil Lee, Robert Wilson, J. G. Smith, D. S. Akerib, V. Savinov, G. Eigen, George R. Kalbfleisch, N. Kwak, N. Horwitz, R. L. Malchow, Christopher G. White, J. S. Miller, M. Thulasidas, D. Perticone, J. Masui, R. Stephens, S. E. Csorna, G. Masek, M. Chadha, Juliet Ritchie Patterson, M. Procario, K. Sparks, S. J. Patton, H. Tajima, C. R. Sun, C. O'Grady, K. K. Gan, F. Butler, T. Skwarnicki, W. T. Ford, M. Lambrecht, R. D. Kass, I. P. J. Shipsey, J. Snow, D. Z. Besson, Horst Severini, M. M. Zoeller, Janice Nelson, C. D. Jones, H. N. Nelson, K. Kinoshita, M. Daoudi, P. C. Kim, H. Yamamoto, R. L. McIlwain, D. Riley, Hubert Kroha, A. V. Barnes, Z. Egyed, R. Wang, M. Goldberg, M. Worris, Marina Artuso, Robert K. Kutschke, M. Kelly, J. Mevissen, G. C. Moneti, J. Gronberg, H. P. Paar, R. Fulton, Karl Berkelman, D. R. Johnson, P. Skubic, D. N. Brown, J. Kandaswamy, E. Nordberg, G. S. Ludwig, T. Miao, S.F. Schaffner, D. M. Coffman, J. A. Ernst, B. K. Heltsley, P. L. Wang, Paul Sheldon, Yuichi Kubota, Alice Bean, R. Davis, D. Peterson, G. Zhu, P. Rubin, F. Morrow, J. L. Rodriguez, Frank Würthwein, N. B. Mistry, P. S. Drell, M. Saulnier, P. Wilson, B. Geiser, M. Lohner, J. J. O'Neill, D. Cinabro, R. Kennett, B. Gittelman, I. J. Kim, D. L. Hartill, Daniel Schmidt, N. Copty, Glen D. Crawford, Daniela Bortoletto, D. G. Cassel, Cong Wang, John Yelton, H. Kagan, R. Poling, K. Honscheid, S. Playfer, R. J. Morrison, Mats A Selen, A. J. Sadoff, V. Romero, N. Hancock, and M. Sapper

Subjects
Physics, Semileptonic decay, Statistics::Theory, Particle physics, Statistics::Applications, Meson, Branching fraction, Electron–positron annihilation, High Energy Physics::Phenomenology, Weak interaction, Particle decay, High Energy Physics::Experiment, B meson, Cornell Electron Storage Ring
Abstract

We present a measurement of the lepton decay asymmetry ${\mathit{A}}_{\mathrm{fb}}$ in the reaction B\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\rightarrow}${\mathit{D}}^{\mathrm{*}}$${\mathit{l}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\nu}${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}_{\mathit{l}}$ using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of ${\mathit{A}}_{\mathrm{fb}}$ confirms that the chirality of the weak interaction is predominantly left-handed in b\ensuremath{\rightarrow}c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using ${\mathit{A}}_{\mathrm{fb}}$ and the previously determined branching ratio, ${\mathit{q}}^{2}$ distribution, and ${\mathit{D}}^{\mathrm{*}}$ polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.

Published
1993

50. Search forτ−→γμ−: A test of lepton number conservation

Author

K. Sparks, S. J. Patton, W. R. Ross, W. M. Yao, Yoram Rozen, M. Worris, Philip Baringer, S. Ball, B. Geiser, Shawn W. Henderson, P. Rubin, J. S. Miller, M. Thulasidas, X. Fu, M. Kelly, J. Mevissen, R. Stephens, S. E. Csorna, B. Ong, Marina Artuso, D. M. Coffman, F. Morrow, D. Perticone, J. Kandaswamy, J. Gronberg, H. P. Paar, R. Fulton, B. K. Heltsley, G. Masek, Juliet Ritchie Patterson, D. R. Johnson, J. A. Ernst, F. Butler, R. Ehrlich, M. Lohner, J. J. O'Neill, D. Peterson, M. Procario, M. Lambrecht, D. N. Brown, Horst Severini, R. Ammar, Shengfeng Yang, K. Kinoshita, T. Liu, M. Modesitt, Hubert Kroha, E. Nordberg, D. F. Cowen, N. Horwitz, M. Chadha, D. Z. Besson, I. P. J. Shipsey, N. Hancock, M. Garcia-Sciveres, A. P. Freyberger, M. Daoudi, G. S. Ludwig, Vipul Jain, C. R. Ng, G. Zhu, George R. Kalbfleisch, Michael S. Witherell, M.K. Sung, K. Lingel, M. Sivertz, Janice Nelson, C. D. Jones, Ryszard Stroynowski, R. L. Malchow, Christopher G. White, J. L. Rodriguez, D. L. Kreinick, C. Bebek, P. Rankin, K. K. Gan, T. Skwarnicki, T. E. Browder, P. C. Kim, J. Snow, Frank Würthwein, N. B. Mistry, H. Worden, Robert K. Kutschke, S. Sanghera, J. Dominick, M. Goldberg, E. H. Thorndike, G. C. Moneti, Pu Wang, Darin Acosta, V. Romero, V. Savinov, C. R. Sun, P. L. Wang, N. Kwak, Karl Berkelman, J. Urheim, W. T. Ford, P. Skubic, S.F. Schaffner, M. Sapper, R. D. Kass, D. Coppage, C. O'Grady, J. P. Alexander, S. Schrenk, E. I. Shibata, B. Nemati, Z. Egyed, D. H. Miller, R. L. McIlwain, H. N. Nelson, F. Muheim, A. V. Barnes, K. Honscheid, Alice Bean, M. Battle, A. J.R. Weinstein, J. G. Smith, J. Whitmore, Jungil Lee, D. G. Cassel, John E. Bartelt, M. S. Alam, R. S. Galik, S. Menary, T. Miao, Daniela Bortoletto, H. Yamamoto, R. Davis, M. M. Zoeller, Sheldon Stone, Paul Avery, R. Wang, R. Poling, David Sperka, S. W. Gray, N. Katayama, D. S. Akerib, G. Eigen, D. L. Hartill, Daniel Schmidt, H. Tajima, S. Roberts, N. Copty, Glen D. Crawford, H. Kagan, S. Playfer, R. J. Morrison, Mats A Selen, A. J. Sadoff, Cong Wang, John Yelton, D. Riley, J. Masui, P. S. Drell, M. Saulnier, P. Wilson, D. Cinabro, R. Kennett, B. Gittelman, Ha Lam, J. D. Richman, I. J. Kim, M. Lattery, B. C. Barish, Paul Sheldon, Yuichi Kubota, and Robert Wilson

Subjects
Physics, Nuclear physics, Particle decay, Particle physics, Muon, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, General Physics and Astronomy, Elementary particle, Lepton number, Particle identification, Lepton
Abstract

A search for the lepton mumber violating decay of the [tau] lepton to the [gamma][mu] final state has been performed with the CLEO II detector at the Cornell [ital e][sup +][ital e[minus]] storage ring CESR. In a data sample that corresponds to an integrated luminosity of 1.55 fb[sup [minus]1], we observe no candidates in the signal region. We thus determine an upper limit of [ital B]([tau][sup [minus]][r arrow][gamma][mu][sup [minus]])[lt]4.2[times]10[sup [minus]6] at 90% confidence level.

Published
1993

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