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1. Free Vibrations of Microstructured Functionally Graded Plate Band with Clamped Edges

Author: Ka��mierczak-Sobi��ska, Magda and J��drysiak, Jaros��aw
Abstract: Vibrations in Physical Systems, 32(2), 2021216
Published: 2021
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2. Search for a dark photon in electroproduced e+e− pairs with the Heavy Photon Search experiment at JLab

Author: S. Paul, O. Moreno, M. Osipenko, M. Carpinelli, M. Garçon, B. Reese, H. Egiyan, Volker D. Burkert, P. H. Adrian, K. Livingston, L. Elouadrhiri, R. Essig, L. Colaneri, Bogdan Wojtsekhowski, A. Filippi, R. Dupre, M. Battaglieri, B. Raydo, N. Randazzo, William T. Cooper, M. Khandaker, S. Boyarinov, K. McCarty, A. Deur, M. Guidal, A. P. Freyberger, Norman A. Graf, C. Munoz Camacho, S. Uemura, M. Holtrop, S. Bueltmann, H. Szumila-Vance, K.C. Moffeit, Valeria Sipala, C. Field, M. T. Graham, R. Paremuzyan, M. Solt, F. X. Girod, A. D'Angelo, G. Charles, D. Calvo, R. De Vita, C. Cuevas, M. Bondì, Emanuele Leonora, G. Kalicy, D. Sokhan, Ryan Herbst, B. McKinnon, M. De Napoli, Philip Schuster, Alexander Grillo, M. Oriunno, Larry Weinstein, N. Dashyan, A. Celentano, Vitaliy Fadeyev, Y. G. Sharabian, B. Yale, S. Stepanyan, A. Simonyan, N. Gevorgyan, Natalia Toro, J. A. Jaros, N. A. Baltzell, V. P. Kubarovsky, G. Simi, Jeremy McCormick, S. Niccolai, H. Voskanyan, Alessandro Rizzo, A.C. Odian, T. Maruyama, M. Ungaro, T. K. Nelson, and K. A. Griffioen
Subjects: Coupling, Physics, Photon, Luminosity (scattering theory), 010308 nuclear & particles physics, 01 natural sciences, 7. Clean energy, Resonance (particle physics), Dark photon, Standard Model, Nuclear physics, 0103 physical sciences, Cathode ray, Invariant mass, 010306 general physics
Abstract: The Heavy Photon Search experiment took its first data in a 2015 engineering run using a 1.056 GeV, 50 nA electron beam provided by CEBAF at the Thomas Jefferson National Accelerator Facility, searching for a prompt, electroproduced dark photon with a mass between 19 and 81 MeV/c2. A search for a resonance in the e+e- invariant mass distribution, using 1.7 days (1170 nb-1) of data, showed no evidence of dark photon decays above the large QED background, confirming earlier searches and demonstrating the full functionality of the experiment. Upper limits on the square of the coupling of the dark photon to the standard model photon are set at the level of 6×10-6. Future runs with higher luminosity will explore new territory.
Published: 2018

3. THU0486 Angiopoetin-2 as a new valuable marker of disease activity in children with juvenile idiopathic arthritis

Author: Elżbieta Smolewska and J Świdrowska-Jaros
Subjects: medicine.medical_specialty, business.industry, Angiogenesis, Ultrasound, Arthritis, Disease, medicine.disease, Gastroenterology, Pathogenesis, Vascularity, Internal medicine, Medicine, Juvenile, Synovial fluid, medicine.symptom, business
Abstract: Background Angiopoetin-2 (ANG-2) is one of the main angiogenesis modulators. As synovial angiogenesis is considered to be an important early step in the course and pathogenesis of juvenile idiopathic arthritis (JIA), it may be a valuable marker of activity of the disease. Objectives To evaluate ANG-2 serum and synovial fluid levels in JIA patients and its possible correlation with disease activity and the degree of ultrasound-detected synovial angiogenesis. Methods Serum levels of vascular markers were measured in 63 patients with JIA (aged 1,5–17) and 31 age-matched healthy controls. Synovial fluid was collected from 17 JIA patients. Disease activity (low, medium and high) was assessed by JADAS-27 scale. Ultrasound examination of inflamed joints was performed in each JIA patient and synovial angiogenesis was evaluated by means of Power Doppler ultrasonography (PDUS) and the 4th grade vascularity scale (0–3). Results ANG-2 serum levels were higher in children with JIA comparing to the healthy controls (5,5±1,2 ng/ml vs. 1.9±1.4 ng/ml). Serum concentration of ANG-2 in JIA children increased with disease activity (1,4±0,9 ng/ml vs. 1,4±1,0 ng/ml vs. 1,8±2,2 ng/ml), whereas Ang-2 levels in the synovial fluid were the highest in the high disease activity (3,4±2,5 ng vs. 12,5±9,5 ng/ml vs. 26,4±9,0 ng/ml, p Conclusions ANG-2 might be a valuable marker in JIA children with high disease activity. Together with ultrasound examination, it may add more information about disease severity, what may be helpful in introducing the correct therapy. Disclosure of Interest None declared
Published: 2017

4. High-precision measurement of the left-right Z Boson cross-section asymmetry

Author: P. C. Rowson, D.L. Wagner, H. Yuta, O. H. Saxton, H. R. Band, G. Crawford, M. R. Convery, R. Berger, C. H. Park, V. Lia, S. Walston, T. Maruyama, Michael J. Fero, E. R. Weiss, U. Nauenberg, D. W. G. S. Leith, C.Y. Prescott, S. S. Hertzbach, S. Narita, D. L. Burke, W. M. Bugg, D. Su, R. S. Panvini, D. Falciai, M. Piccolo, T. H. Burnett, R. R. Kofler, H. O. Cohn, F. E. Taylor, M. Morii, M.E. Huffer, G. R. Bower, J. A. Jaros, A. W. Weidemann, H. Akimoto, J. M. Bauer, M. Iwasaki, D. Onoprienko, C.J.S. Damerell, Sridhara Dasu, John A. Coller, F. Suekane, D. Aston, R. J. Wilson, N. De Groot, J. P. Fernandez, Michael Doser, J.J. Reidy, J. Va’vra, I. M. Peruzzi, R. Kroeger, C. Baltay, N. B. Sinev, M. Langston, Melody A. Swartz, R. Prepost, V.V. Serbo, P.F. Jacques, J. L. Wittlin, A. S. Johnson, L.S. Rochester, T. L. Usher, K.G. Baird, Timothy Barklow, T. Schalk, V. Cook, R. de Sangro, David A. Jackson, I. Adam, A.K. McKemey, K. Hasuko, C. C. Young, T. R. Wright, T. Abe, S. Manly, R. Messner, J. J. Russell, V. Eschenburg, L.S. Osborne, I. Erofeeva, Aaron S. Chou, W. J. Wisniewski, M. Kalelkar, S. J. Yellin, J.R. Bogart, Koya Abe, K. T. Flood, G. Nesom, Martin Breidenbach, G. Blaylock, C. Lin, G. Bellodi, P.L. Reinertsen, A. Sugiyama, Erez Etzion, R. K. Yamamoto, Thomas W. Markiewicz, Gilbert Shapiro, R. E. Cassell, X. Huynh, R. Verdier, E. L. Hart, R. Cowan, N. Oishi, R. Frey, A. P. Waite, Julia Thom, J. R. Johnson, R. Kajikawa, B. A. Schumm, S. Willocq, H. M. Steiner, H.J. Kang, H. A. Neal, S. Fahey, H. Staengle, Kenji Abe, Victor Murzin, A. Calcaterra, T. B. Moore, J. A. Snyder, J. Schwiening, G. Mancinelli, B. N. Ratcliff, E. Torrence, P. E. Stamer, J. E. Brau, R.J. Plano, S. H. Williams, J. Yashima, Richard Dubois, Achim Stahl, John Scott Whitaker, Zihao Jiang, K.C. Moffeit, J.W. Wang, M. Woods, David Muller, D. Dong, Giancarlo Mantovani, Philip Burrows, M. Daoudi, and L. Piemontese
Subjects: Physics, Particle physics, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, Sigma, FOS: Physical sciences, Weinberg angle, Asymmetry, Measure (mathematics), law.invention, High Energy Physics - Experiment, Nuclear physics, Cross section (physics), High Energy Physics - Experiment (hep-ex), law, Production (computer science), Collider, media_common
Abstract: The authors present a measurement of the left-right cross-section asymmetry (ALR) for Z boson production by e{sup +}e{sup {minus}} collisions. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider (SLC) during the period 1996--1998. Using a sample of 383,487 Z decays collected during the 1996-1998 runs they measure the pole-value of the asymmetry, A{sub LR}{sup 0}, to be 0.15056 {+-} 0.00239 which is equivalent to an effective weak mixing angle of sin{sup 2}Sigma{sub W}{sup eff} = 0.23107 {+-} 0.00030. The result for the complete 1992--1998 dataset comprising 537 thousand Z decays is sin{sup 2}Sigma{sub W}{sup eff} = 0.23097 {+-} 0.00027.
Published: 2016

5. Advances in Calorimetry

Author: J. E. Brau, Hong Ma, and J. A. Jaros
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon detector, Systems engineering, Particle flow, Calorimetry
Abstract: We review recent advances in calorimetry for high-energy physics. We provide an overview of the fundamentals of calorimetry, then survey calorimeters used in recent experiments, which represent the current state of the art. We conclude with descriptions of several research and development efforts and discuss future directions of the field.
Published: 2010

6. An electromagnetic calorimeter for the silicon detector concept

Author: Veljko Radeka, D. R. Freytag, R. Herbst, R. Lander, Gunther Haller, Martin Breidenbach, M. Tripathi, D. M. Strom, N. Graf, Y. Karyotakis, J. A. Jaros, R. Frey, J. E. Brau, T. Nelsen, and B. Holbook
Subjects: Physics, International Linear Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, General Physics and Astronomy, Calorimetry, 01 natural sciences, 030218 nuclear medicine & medical imaging, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Electromagnetic calorimeter, 0103 physical sciences, Physics::Accelerator Physics, Silicon detector, High Energy Physics::Experiment
Abstract: A silicon-tungsten calorimeter for silicon detector (SiD) at the International Linear Collider is under development. Recent progress is summarized.
Published: 2007

7. Adoptive therapy with donor lymphocyte infusion after allogenic hematopoietic SCT in pediatric patients

Author: Ewa Gorczyńska, Magdalena Wozniak, Anna Pieczonka, Aleksandra Krasowska-Kwiecień, Mariusz Wysocki, K. Kałwak, K Rewucka, Jerzy Kowalczyk, Jolanta Gozdzik, Agnieszka Zaucha-Prażmo, Robert Dębski, Katarzyna Drabko, Jacek Wachowiak, Alicja Chybicka, and J Krukowska-Jaros
Subjects: Male, Donor lymphocyte infusion, Disease-Free Survival, immune system diseases, hemic and lymphatic diseases, Living Donors, Medicine, Humans, Child, Retrospective Studies, Transplantation, business.industry, Hematopoietic Stem Cell Transplantation, Infant, Newborn, Infant, Hematology, Allografts, Survival Rate, Haematopoiesis, surgical procedures, operative, Child, Preschool, Hematologic Neoplasms, Lymphocyte Transfusion, Immunology, Female, business, therapeutics, human activities
Abstract: The aim of this study was to analyse the experience of Polish Pediatric Group for Hematopoietic Stem Cell Transplantation in respect to donor lymphocyte infusion procedure. The study included 51 pediatric patients with malignant (45) and non-malignant (6) diseases treated with DLI in the period 1993-2012. The indications for DLI were as follows: (1) increasing recipient chimerism after non-ablative hematopoietic SCT (18 patients); (2) immunomodulation after a reduced intensity conditioning regimen (2 patients); (3) increase in minimal residual disease detection (3 patients); and (4) relapse (28 patients). DLI was carried out at a median of 6 (0.5-79) months after SCT. DLI was administered as either a single-dose (in 19 cases) or in escalating-dose regimens (in 32 cases). The median total dose of CD3-positive T cells was 28.0 (0.1-730.0) × 10(6)/kg body weight. The time for assessment of DLI efficacy ranged from 0 to 70 (median 3) months. At evaluation, 18 patients experienced CR, 3 achieved PR, 19 showed relapse and 11 rejected the graft. DLI was found to be effective in 39% of cases. Complications of the procedure occurred in 18 patients; of these, 2 died. To sum up DLI shows efficacy in a significant percentage of children. Mortality related to the therapy adverse effects is low. However, this method requires standardization.
Published: 2014

8. The search for Bs0 oscillations at SLD

Author: J. A. Jaros
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Oscillation, Maximum likelihood analysis, Expected value, Instrumentation, Lepton, Vertex (geometry)
Abstract: The SLD experiment at the SLAC Linear Collider has updated three searches for the time dependence of B s 0 oscillations. One search uses events with a reconstructed D s meson; a second search uses events with a lepton and a topologically identified charmed meson; and the third uses events in which both a secondary and tertiary vertex are distinguished. The combined analyses are sensitive to values of Δ m s , the oscillation frequency, up to 13.0 ps −1 . A preliminary maximum likelihood analysis excludes Δ m s ps −1 and 11.8 Δ m s ps −1 at 95% CL. Including this data, the combined world data now imply Δ m s >15.0 ps −1 at 95% CL, and are not incompatible with a signal near the expected value, Δ m s ∼15 ps −1 .
Published: 2001

9. Improved Direct Measurement of Leptonic Coupling Asymmetries with PolarizedZBosons

Author: Koya Abe, Kenji Abe, T. Abe, I. Adam, H. Akimoto, D. Aston, K. G. Baird, C. Baltay, H. R. Band, T. L. Barklow, J. M. Bauer, G. Bellodi, R. Berger, G. Blaylock, J. R. Bogart, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, A. Calcaterra, R. Cassell, A. Chou, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. F. Cowan, G. Crawford, C. J. S. Damerell, M. Daoudi, N. de Groot, R. de Sangro, D. N. Dong, M. Doser, R. Dubois, I. Erofeeva, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, J. P. Fernandez, K. Flood, R. Frey, E. L. Hart, K. Hasuko, S. S. Hertzbach, M. E. Huffer, X. Huynh, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. Kajikawa, M. Kalelkar, H. J. Kang, R. R. Kofler, R. S. Kroeger, M. Langston, D. W. G. Leith, V. Lia, C. Lin, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, A. K. McKemey, R. Messner, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, S. Narita, U. Nauenberg, H. Neal, G. Nesom, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, C. H. Park, I. Peruzzi, M. Piccolo, L. Piemontese, R. J. Plano, R. Prepost, C. Y. Prescott, B. N. Ratcliff, J. Reidy, P. L. Reinertsen, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, B. A. Schumm, J. Schwiening, V. V. Serbo, G. Shapiro, N. B. Sinev, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, F. E. Taylor, J. Thom, E. Torrence, T. Usher, J. Va'vra, R. Verdier, D. L. Wagner, A. P. Waite, S. Walston, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, T. R. Wright, R. K. Yamamoto, J. Yashima, S. J. Yellin, C. C. Young, and H. Yuta
Subjects: Physics, Particle physics, media_common.quotation_subject, High Energy Physics::Phenomenology, Hadron, FOS: Physical sciences, General Physics and Astronomy, Asymmetry, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Polar coordinate system, Lepton, media_common, Boson
Abstract: We present final measurements of the Z boson-lepton coupling asymmetry parameters Ae, Amu, and Atau with the complete sample of polarized Z bosons collected by the SLD detector at the SLAC Linear Collider. From the left-right production and decay polar angle asymmetries in leptonic Z decays we measure Ae = 0.1544 +- 0.0060, Amu = 0.142 +- 0.015, and Atau = 0.136 +- 0.015. Combined with our left-right asymmetry measured from hadronic decays, we find Ae = 0.1516 +- 0.0021. Assuming lepton universality, we obtain a combined effective weak mixing angle of sin**2 theta^{eff}_W = 0.23098 +- 0.00026., 13 pages latex, including 1 figure. Submitted to Phys. Rev. Lett
Published: 2001

10. First Symmetry Tests in PolarizedZ0Decays tobb¯g

Author: Koya Abe, Kenji Abe, T. Abe, I. Adam, H. Akimoto, D. Aston, K. G. Baird, C. Baltay, H. R. Band, T. L. Barklow, J. M. Bauer, G. Bellodi, R. Berger, G. Blaylock, J. R. Bogart, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, A. Calcaterra, R. Cassell, A. Chou, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. F. Cowan, G. Crawford, C. J. S. Damerell, M. Daoudi, N. de Groot, R. de Sangro, D. N. Dong, M. Doser, R. Dubois, I. Erofeeva, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, J. P. Fernandez, K. Flood, R. Frey, E. L. Hart, K. Hasuko, S. S. Hertzbach, M. E. Huffer, X. Huynh, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. Kajikawa, M. Kalelkar, H. J. Kang, R. R. Kofler, R. S. Kroeger, M. Langston, D. W. G. Leith, V. Lia, C. Lin, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, A. K. McKemey, R. Messner, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, S. Narita, U. Nauenberg, H. Neal, G. Nesom, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, C. H. Park, I. Peruzzi, M. Piccolo, L. Piemontese, R. J. Plano, R. Prepost, C. Y. Prescott, B. N. Ratcliff, J. Reidy, P. L. Reinertsen, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, B. A. Schumm, J. Schwiening, V. V. Serbo, G. Shapiro, N. B. Sinev, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, D. Su, F. Suekane, A. Sugiyama, A. Suzuki, M. Swartz, F. E. Taylor, J. Thom, E. Torrence, T. Usher, J. Va'vra, R. Verdier, D. L. Wagner, A. P. Waite, S. Walston, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, T. R. Wright, R. K. Yamamoto, J. Yashima, S. J. Yellin, C. C. Young, and H. Yuta
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Polar, High Energy Physics::Experiment, Parity (physics), 010306 general physics, Polarization (waves), 01 natural sciences, Vertex (geometry), Boson
Abstract: We have made the first direct symmetry tests in the decays of polarized Z0 bosons into fully identified bbg states, collected in the SLD experiment at SLAC. We searched for evidence of parity violation at the bbg vertex by studying the asymmetries in the b-quark polar- and azimuthal-angle distributions, and for evidence of T-odd, CP-even or CP-odd, final-state interactions by measuring angular correlations between the three-jet plane and the Z0 polarization. We found results consistent with standard model expectations and set 95% C. limits on anomalous contributions.
Published: 2001

11. First Direct Measurement of the Parity-Violating Coupling of theZ0to thesQuark

Author: U. Nauenberg, G. Crawford, M. Doser, R. Frey, T. Abe, T. Maruyama, J. R. Johnson, R. Kajikawa, V. Murzin, I. Erofeeva, C. Y. Prescott, D. Su, A. Chou, K.C. Moffeit, M. Iwasaki, R. E. Cassell, J. E. Brau, K. T. Flood, H. J. Kang, G. Nesom, Gilbert Shapiro, E. Etzion, Thomas W. Markiewicz, X. Huynh, T. H. Burnett, R. Verdier, M. Piccolo, C.J.S. Damerell, R. J. Wilson, E. L. Hart, H. O. Cohn, J. M. Bauer, S. Willocq, H. Akimoto, Dominik Müller, O. H. Saxton, E. Torrence, G. Mancinelli, H. R. Band, H. M. Steiner, M. Langston, V. V. Serbo, D. J. Jackson, R. Cowan, D. N. Dong, Achim Stahl, S. H. Williams, R. S. Panvini, D. Falciai, M. Kalelkar, N. Oishi, D. Aston, Timothy Barklow, M. R. Convery, S. Walston, B. N. Ratcliff, J. A. Snyder, S. Fahey, P. E. Stamer, J. Thom, Giancarlo Mantovani, A. Calcaterra, A. W. Weidemann, T. R. Wright, L. S. Rochester, R. Berger, T. Schalk, T. L. Usher, S. Manly, A. Suzuki, M. E. Huffer, C. C. Young, J. A. Coller, L. Piemontese, K. G. Baird, J. Yashima, J. Schwiening, K. Hasuko, A. S. Johnson, G. R. Bower, Melody A. Swartz, R. R. Kofler, M. Morii, V. Cook, J. A. Jaros, Martin Breidenbach, D. L. Wagner, G. Blaylock, J. J. Russell, L.S. Osborne, J. P. Fernandez, C. H. Park, Bruce Schumm, R. de Sangro, V. Lia, J. Va'vra, T. B. Moore, J. S. Whitaker, E. R. Weiss, J.J. Reidy, R. Messner, F. Suekane, S. Narita, D. L. Burke, W. M. Bugg, R. Kroeger, C.S. Lin, V. Eschenburg, N. B. Sinev, J. L. Wittlin, I. Adam, D. W. G. S. Leith, S. S. Hertzbach, H. Yuta, G. Bellodi, R.J. Plano, Zihao Jiang, M. Woods, H. Staengle, A. K. McKemey, Kenji Abe, I. M. Peruzzi, R. Dubois, Philip Burrows, P.L. Reinertsen, A. Sugiyama, F. E. Taylor, J. R. Bogart, M. Daoudi, N. De Groot, Koya Abe, P. C. Rowson, A. P. Waite, C. Baltay, D. Onoprienko, W. J. Wisniewski, S. J. Yellin, H. A. Neal, R. Prepost, P.F. Jacques, and R. K. Yamamoto
Subjects: Physics, Nuclear physics, Strange quark, Particle physics, Angular distribution, Electron–positron annihilation, Hadron, General Physics and Astronomy, High Energy Physics::Experiment, Parity (physics), Nuclear Experiment, Boson
Abstract: The authors have made the first direct measurement of the parity-violating coupling of the Z{sup 0} boson to the strange quark, A{sub s}, using {approximately}550,000 e{sup +}e{sup {minus}} --> Z{sup 0} --> hadrons event produced with a polarized electron beam and recorded by the SLD experiment. Z{sup 0} s anti-s events were tagged by the absence of B or D hadrons and the presence in each hemisphere of a high-momentum K{sup {+-}} or K{sub s}{sup 0}. From the polar angle distributions of the strangeness-signed thrust axis, the authors obtained A{sub s} = 0.895{+-}0.066(stat.){+-}0.062(syst.). The analyzing power and u anti-u + d anti-d background were constrained using the data.
Published: 2000

12. Precise Measurement of theb-Quark Fragmentation Function inZ0Boson Decays

Author: Kenji Abe, Koya Abe, T. Abe, I. Adam, H. Akimoto, D. Aston, K. G. Baird, C. Baltay, H. R. Band, T. L. Barklow, J. M. Bauer, G. Bellodi, R. Berger, G. Blaylock, J. R. Bogart, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, A. Calcaterra, R. Cassell, A. Chou, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. F. Cowan, G. Crawford, C. J. S. Damerell, M. Daoudi, S. Dasu, N. de Groot, R. de Sangro, D. N. Dong, M. Doser, R. Dubois, I. Erofeeva, V. Eschenberg, E. Etzion, S. Fahey, D. Falciai, J. P. Fernandez, K. Flood, R. Frey, E. L. Hart, K. Hasuko, S. S. Hertzbach, M. E. Huffer, X. Huynh, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. Kajikawa, M. Kalelkar, H. Kang, R. R. Kofler, R. S. Kroeger, M. Langston, D. W. G. Leith, V. Lia, C. Lin, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, A. K. McKemey, R. Messner, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, S. Narita, U. Nauenberg, G. Nesom, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, C. H. Park, I. Peruzzi, M. Piccolo, L. Piemontese, R. J. Plano, R. Prepost, C. Y. Prescott, B. N. Ratcliff, J. Reidy, P. L. Reinertsen, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, B. A. Schumm, J. Schwiening, V. V. Serbo, G. Shapiro, N. B. Sinev, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, D. Su, F. Suekane, A. Sugiyama, M. Swartz, F. E. Taylor, J. Thom, T. Usher, J. Va'vra, R. Verdier, D. L. Wagner, A. P. Waite, S. Walston, J. Wang, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, T. R. Wright, R. K. Yamamoto, J. Yashima, S. J. Yellin, C. C. Young, and H. Yuta
Subjects: Physics, Nuclear physics, Particle physics, Electron–positron annihilation, Hadron, Fragmentation function, General Physics and Astronomy, High Energy Physics::Experiment, B meson, Nuclear Experiment, Bottom quark, Boson
Abstract: The authors have developed a new technique for inclusive reconstruction of the energy of B hadrons. The excellent efficiency and resolution of this technique allow them to make the most precise determination of the b-quark fragmentation function, using e{sup +}e{sup {minus}} {r{underscore}arrow} Z{sup 0} decays recorded in the SLD experiment at SLAC. The authors compared their measurement with the predictions of a number of fragmentation models. The authors excluded several of these models and measured the average scaled energy of weakly-decaying B hadrons to be (x{sub B}) = 0.714{+-}0.005(stat){+-}0.007(syst){+-}0.002 (model-dependence).
Published: 2000

13. Direct Measurement ofAbandAcat theZ0Pole Using a Lepton Tag

Author: Kenji Abe, Koya Abe, T. Abe, I. Adam, T. Akagi, N. J. Allen, A. Arodzero, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, O. Bardon, T. L. Barklow, G. L. Bashindzhagyan, J. M. Bauer, G. Bellodi, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, R. M. Byrne, A. Calcaterra, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, C. J. S. Damerell, M. N. Danielson, M. Daoudi, N. de Groot, R. Dell'Orso, P. J. Dervan, R. de Sangro, M. Dima, A. D'Oliveira, D. N. Dong, M. Doser, R. Dubois, B. I. Eisenstein, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, C. Fan, J. P. Fernandez, M. J. Fero, K. Flood, R. Frey, T. Gillman, G. Gladding, S. Gonzalez, E. R. Goodman, E. L. Hart, J. L. Harton, A. Hasan, K. Hasuko, S. J. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, X. Huynh, H. Hwang, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, Y. Kamyshkov, H. J. Kang, I. Karliner, H. Kawahara, Y. D. Kim, R. King, M. E. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, M. Langston, A. Lath, D. W. G. Leith, V. Lia, C.-J. S. Lin, X. Liu, M. X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, M. Mahjouri, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, G. Menegatti, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, H. Park, C. H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, J. Schwiening, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, R. Steiner, H. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, J. Thom, E. Torrence, N. K. Toumbas, T. Usher, C. Vannini, J. Va'vra, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, S. R. Wagner, D. L. Wagner, A. P. Waite, S. Walston, J. Wang, C. Ward, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, B. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, G. B. Word, T. R. Wright, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, and J. Zhou
Subjects: Coupling, Physics, Semileptonic decay, Particle physics, Muon, Hadron, Detector, General Physics and Astronomy, High Energy Physics::Experiment, Parity (physics), Electron, Nuclear Experiment, Lepton
Abstract: The parity violation parameters Ab and Ac of the Zb anti-b and Zc anti-c couplings have been measured directly, using the polar angle dependence of the Z0-pole polarized cross sections. Bottom and charmed hadrons were tagged via semileptonic decays. Both the muon and electron identification algorithms take advantage of new multivariate techniques, incorporating for the first time information from the SLD Cerenkov Ring Imaging Detector. Based on the 1993-95 SLD sample of 150,000 Z0 decays produced with highly polarized electron beams, we measure: Ab = 0.910 ± 0.068(stat) ± 0.037(syst) Ac = 0.642 ± 0.110(stat) ± 0.063(syst).
Published: 1999

14. Direct Measurement ofAbinZ0Decays Using Charged Kaon Tagging

Author: Kenji Abe, Koya Abe, T. Abe, I. Adam, T. Akagi, N. J. Allen, A. Arodzero, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, O. Bardon, T. L. Barklow, G. L. Bashindzhagyan, J. M. Bauer, G. Bellodi, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, R. M. Byrne, A. Calcaterra, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, C. J. S. Damerell, M. N. Danielson, M. Daoudi, N. de Groot, R. Dell'Orso, P. J. Dervan, R. de Sangro, M. Dima, A. D'Oliveira, D. N. Dong, M. Doser, R. Dubois, B. I. Eisenstein, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, C. Fan, J. P. Fernandez, M. J. Fero, K. Flood, R. Frey, T. Gillman, G. Gladding, S. Gonzalez, E. R. Goodman, E. L. Hart, J. L. Harton, A. Hasan, K. Hasuko, S. J. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, X. Huynh, H. Hwang, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, Y. Kamyshkov, H. J. Kang, I. Karliner, H. Kawahara, Y. D. Kim, R. King, M. E. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, M. Langston, A. Lath, D. W. G. Leith, V. Lia, C.-J. S. Lin, X. Liu, M. X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, M. Mahjouri, G. Mancinelli, S. Manley, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, G. Menegatti, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, H. Park, C. H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, J. Schwiening, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, R. Steiner, H. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, J. Thom, E. Torrence, N. K. Toumbas, T. Usher, C. Vannini, J. Va'vra, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, S. R. Wagner, D. L. Wagner, A. P. Waite, S. Walston, J. Wang, C. Ward, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, B. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, G. B. Word, T. R. Wright, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, and J. Zhou
Subjects: Nuclear physics, Quark, Physics, Particle physics, media_common.quotation_subject, Hadron, General Physics and Astronomy, Electron, Asymmetry, Vertex (geometry), media_common, Boson
Abstract: We present a direct measurement of the parity-violating asymmetry A{sub b} in the Z{sup 0} to b anti-b coupling using a new technique to distinguish the b and anti-b quarks using charged kaons from B decays. The Z{sup 0} bosons are produced in e{sup +}e{sup -} collisions at the SLC with longitudinally polarized electrons. b anti-b events are selected using a secondary vertex mass tag and A{sub b} is determined from the left-right forward-backward asymmetry. From the 1994-1995 data sample, selected from 100,000 hadronic Z{sup 0} decays, we obtain A{sub b} = 0.855 {+-} 0. 088{sub stat} {+-} 0.102{sub sys}.
Published: 1999

15. Direct Measurement of Parity Violation in the Coupling ofZ0Bosons tobQuarks Using a Mass Tag and Momentum-Weighted Track Charge

Author: K. Abe, T. Abe, I. Adam, T. Akagi, N. J. Allen, A. Arodzero, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, O. Bardon, T. L. Barklow, J. M. Bauer, G. Bellodi, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, A. Calcaterra, D. O. Caldwell, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, C. J. S. Damerell, M. N. Danielson, M. Daoudi, N. de Groot, R. Dell'Orso, P. J. Dervan, R. de Sangro, M. Dima, A. D'Oliveira, D. N. Dong, P. Y. C. Du, R. Dubois, B. I. Eisenstein, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, C. Fan, J. P. Fernandez, M. J. Fero, K. Flood, R. Frey, T. Gillman, G. Gladding, S. Gonzalez, E. L. Hart, J. L. Harton, A. Hasan, K. Hasuko, S. J. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, X. Huynh, H. Hwang, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, Y. Kamyshkov, H. J. Kang, I. Karliner, H. Kawahara, Y. D. Kim, R. King, M. E. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, M. Langston, A. Lath, D. W. G. Leith, V. Lia, C.-J. S. Lin, X. Liu, M. X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, G. Menegatti, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, H. Park, C. H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, J. Schwiening, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, R. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, J. Thom, E. Torrence, N. K. Toumbas, A. I. Trandafir, J. D. Turk, T. Usher, C. Vannini, J. Va'vra, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, S. R. Wagner, D. L. Wagner, A. P. Waite, S. Walston, J. Wang, C. Ward, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, B. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, G. B. Word, T. R. Wright, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, and J. Zhou
Subjects: Physics, Quark, Meson, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Elementary particle, Parity (physics), Nuclear physics, Particle decay, Physics::Accelerator Physics, High Energy Physics::Experiment, B meson, Boson
Abstract: We present a direct measurement of the parity-violation parameter ${A}_{b}$ using a self-calibrating track-charge technique. In the SLAC Linear Collider Large Detector (SLD) experiment we observe hadronic decays of ${Z}^{0}$ bosons produced in collisions between longitudinally polarized electrons and unpolarized positrons at the SLAC Linear Collider. A sample of $b\overline{b}$ events is selected using the topologically reconstructed mass of $B$ hadrons. From our 1993--1995 sample of approximately 150 000 hadronic ${Z}^{0}$ decays, we obtain ${A}_{b}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.911\ifmmode\pm\else\textpm\fi{}0.045(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.045(\mathrm{syst})$.
Published: 1998

16. Initial impact parameter resolution of the new SLD vertex detector

Author: K Skarpaas Viii, J. Huber, D. N. Dong, V. Lia, M.G Strauss, A. Chou, S.S Hertzbach, I. Lee, M. Foss, Su Dong, S. Manly, A.L. Lintern, J. Kelsey, G. Crawford, A. Nichols, A. I. Trandafir, J. Hoeflich, R.L. English, Tadashi Nagamine, Stephen Watts, A. Arodzero, J. A. Jaros, D. Ross, J. Sinnott, G. H. Zapalac, A. K. McKemey, T. B. Moore, Minghui Liu, F. Suekane, Gunther Haller, E. Etzion, Martin Breidenbach, N. B. Sinev, V. V. Serbo, N. Oishi, C. Baltay, H. Masuda, M. E. Huffer, E. R. Weiss, C.J.S. Damerell, W. T. Emmet, J. Yashima, P.J. Dervan, F. E. Taylor, K. Hasuko, R. Verdier, J. J. Russell, Koji Abe, L.S. Osborne, J. E. Brau, H. Yuta, M. B. Smy, R. Frey, T. L. Usher, J. A. Snyder, D. J. Jackson, and P. N. Burrows
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Detector, Resolution (electron density), Particle accelerator, Particle detector, law.invention, Data acquisition, Optics, Upgrade, law, High Energy Physics::Experiment, Electronics, Impact parameter, business, Instrumentation
Abstract: During 1996 the SLD collaboration completed the construction of, and began the operation of, a new vertex detector (VXD3). This detector, based on 96 CCD’s each of 13 cm 2 area, is an upgrade of the original vertex detector of SLD (VXD2), and is made possible by advances in the technology of CCD detectors. New front-end electronics and a new data acquisition system were developed for this upgrade. Its improved characteristics will enhance many SLD measurements, and open the possibility to observe B s 0 -mixing. More than 50 000 Z events obtained with the new vertex detector have been analyzed. Results on the new detector performance (including resolution evaluation) from this first data are presented.
Published: 1998

17. Measurement of Rb Using a Vertex Mass Tag

Author: K. Abe, T. Akagi, N. J. Allen, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, G. Baranko, O. Bardon, T. L. Barklow, G. L. Bashindzhagyan, A. O. Bazarko, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, T. Bolton, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, W. Busza, A. Calcaterra, D. O. Caldwell, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, A. D'Oliveira, C. J. S. Damerell, M. Daoudi, N. de Groot, R. De Sangro, R. Dell'Orso, P. J. Dervan, M. Dima, D. N. Dong, P. Y. C. Du, R. Dubois, B. I. Eisenstein, R. Elia, E. Etzion, S. Fahey, D. Falciai, C. Fan, J. P. Fernandez, M. J. Fero, R. Frey, T. Gillman, G. Gladding, S. Gonzalez, E. L. Hart, J. L. Harton, A. Hasan, Y. Hasegawa, K. Hasuko, S. J. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, H. Hwang, Y. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, H. J. Kang, I. Karliner, H. Kawahara, H. W. Kendall, Y. D. Kim, M. E. King, R. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, J. F. Labs, M. Langston, A. Lath, J. A. Lauber, D. W. G. S. Leith, V. Lia, M. X. Liu, X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, D. Muller, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, Y. Ohnishi, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, C. H. Park, H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, J. Schwiening, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, H. Staengle, P. Stamer, H. Steiner, R. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, E. Torrence, A. I. Trandafir, J. D. Turk, T. Usher, J. Va'vra, C. Vannini, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, D. L. Wagner, S. R. Wagner, A. P. Waite, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, M. Woods, G. B. Word, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, J. Zhou, Abe, K, Akagi, T, Allen, N, Ash, W, Aston, D, Baird, K, Baltay, C, Band, H, Barakat, M, Baranko, G, Bardon, O, Barklow, T, Bashindzhagyan, G, Bazarko, A, Ben David, R, Benvenuti, A, Bilei, G, Bisello, D, Blaylock, G, Bogart, J, Bolen, B, Bolton, T, Bower, G, Brau, J, Breidenbach, M, Bugg, W, Burke, D, Burnett, T, Burrows, P, Busza, W, Calcaterra, A, Caldwell, D, Calloway, D, Camanzi, B, Carpinelli, M, Cassell, R, Castaldi, R, Castro, A, Cavalli Sforza, M, Chou, A, Church, E, Cohn, H, Coller, J, Cook, V, Cotton, R, Cowan, R, Coyne, D, Crawford, G, D'Oliveira, A, Damerell, C, Daoudi, M, de Groot, N, De Sangro, R, Dell'Orso, R, Dervan, P, Dima, M, Dong, D, Du, P, Dubois, R, Eisenstein, B, Elia, R, Etzion, E, Fahey, S, Falciai, D, Fan, C, Fernandez, J, Faro, M, Frey, R, Gillman, T, Gladding, G, Gonzalez, S, Hart, E, Harton, J, Hasan, A, Hasegawa, Y, Hasuko, K, Hedges, S, Hertzbach, S, Hildreth, M, Huber, J, Huffer, M, Hughes, E, Hwang, H, Iwasaki, Y, Jackson, D, Jacques, P, Jaros, J, Jiang, Z, Johnson, A, Johnson, J, Johnson, R, Junk, T, Kajikawa, R, Kalelkar, M, Kang, H, Karliner, I, Kawahara, H, Kendall, H, Kim, Y, King, M, King, R, Kofler, R, Krishna, N, Kroeger, R, Labs, J, Langston, M, Lath, A, Lauber, J, Leith, D, Lia, V, Liu, M, Liu, X, Loreti, M, Lu, A, Lynch, H, Ma, J, Mancinelli, G, Manly, S, Mantovani, G, Markiewicz, T, Maruyama, T, Masuda, H, Mazzucato, E, Mckemey, A, Meadows, B, Messner, R, Mockett, P, Moffeit, K, Moore, T, Muller, D, Nagamine, T, Narita, S, Nauenberg, U, Neal, H, Nussbaum, M, Ohnishi, Y, Oishi, N, Onoprienko, D, Osborne, L, Panvini, R, Park, C, Park, H, Pavel, T, Peruzzi, I, Piccolo, M, Piemontese, L, Pieroni, E, Pitts, K, Plano, R, Prepost, R, Prescott, C, Punkar, G, Quigley, J, Ratcliff, B, Reeves, T, Reidy, J, Reinertsen, P, Rensing, P, Rochester, L, Rowson, P, Russell, J, Saxton, O, Schall, T, Schindler, R, Schumm, B, Schwiening, J, Sen, S, Serbo, V, Shaevitz, M, Shank, J, Shapiro, G, Sherden, D, Shmakov, K, Simopoulos, C, Sinev, N, Smith, S, Smy, M, Snyder, J, Staengle, H, Stamer, P, Steiner, H, Steiner, R, Strauss, M, Su, D, Suekane, F, Sugiyama, A, Suzuki, S, Swartz, M, Szumilo, A, Takahashi, T, Taylor, F, Torrence, E, Trandafir, A, Turk, J, Usher, T, Va'Vra, J, Vannini, C, Vella, E, Venuti, J, Verdier, R, Verdini, P, Wagner, D, Wagner, S, Waite, A, Watts, S, Weidemann, A, Weiss, E, Whitaker, J, White, S, Wickens, F, Williams, D, Williams, S, Willocq, S, Wilson, R, Wisniewski, W, Woods, M, Word, G, Wyss, J, Yamamoto, R, Yamartino, J, Yang, X, Yashima, J, Yellin, S, Young, C, Yuta, H, Zapalac, G, Zdarko, R, and Zhou, J
Subjects: Physics, Particle physics, Meson, Physics::Instrumentation and Detectors, Electron–positron annihilation, Gluons, Hadron, FOS: Physical sciences, General Physics and Astronomy, Elementary particle, High Energy Physics - Experiment, Vertex (geometry), High Energy Physics - Experiment (hep-ex), Particle decay, B meson, High Energy Physics::Experiment, Nuclear Experiment, Boson
Abstract: We report a new measurement of Rb = Gamma(Z0->b-bbar) / Gamma(Z0->hadrons) using a double tag technique, where the b hemisphere selection is based on the reconstructed mass of the B hadron decay vertex. The measurement was performed using a sample of 130k hadronic Z0 events, collected with the SLD at the SLC. The method utilizes the 3-D vertexing abilities of the CCD pixel vertex detector and the small stable SLC beams to obtain a high b-tagging efficiency and purity. We obtain Rb=0.2142+/-0.0034(stat.)+/-0.0015(syst.)+/-0.0002(R_c)., 11 pages including 3 eps files
Published: 1998

18. Design and performance of the SLD vertex detector: a 307 Mpixel tracking system

Author: J. Sinnott, M. Foss, W. T. Emmet, Su Dong, P.J. Dervan, M. G. Strauss, K. Hasuko, D. N. Dong, J. J. Russell, L.S. Osborne, F. E. Taylor, J. A. Snyder, I. Lee, Tadashi Nagamine, S. Manly, A. Chou, G. H. Zapalac, Martin Breidenbach, A. I. Trandafir, C.J.S. Damerell, E. R. Weiss, J. Kelsey, R. Verdier, R. Frey, N. Oishi, Stephen Watts, A. Arodzero, S. S. Hertzbach, N. B. Sinev, K Skarpaas Viii, G. Crawford, H. Yuta, D. Ross, M. E. Huffer, J. Yashima, J. A. Jaros, M. B. Smy, A.L. Lintern, A. K. McKemey, T. L. Usher, V. V. Serbo, Gunther Haller, R.L. English, P. N. Burrows, T. B. Moore, D. J. Jackson, Minghui Liu, F. Suekane, C. Baltay, H. Masuda, E. Etzion, J. E. Brau, J. Hoeflich, A. Nichols, V. Lia, and K. Abe
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Vertex (computer graphics), Signal processing, Pixel, Physics::Instrumentation and Detectors, business.industry, Detector, Tracking system, Signal, law.invention, Optics, law, High Energy Physics::Experiment, Point (geometry), Collider, business, Instrumentation
Abstract: This paper describes the design, construction, and initial operation of SLD's upgraded vertex detector which comprises 96 two-dimensional charge-coupled devices (CCDs) with a total of 307 Mpixel. Each pixel functions as an independent particle detecting element, providing space point measurements of charged particle tracks with a typical precision of 4 μm in each co-ordinate. The CCDs are arranged in three concentric cylinders just outside the beam-pipe which surrounds the e+e− collision point of the SLAC Linear Collider (SLC). The detector is a powerful tool for distinguishing displaced vertex tracks, produced by decay in flight of heavy flavour hadrons or tau leptons, from tracks produced at the primary event vertex. The requirements for this detector include a very low mass structure (to minimize multiple scattering) both for mechanical support and to provide signal paths for the CCDs; operation at low temperature with a high degree of mechanical stability; and high speed CCD readout, signal processing, and data sparsification. The lessons learned in achieving these goals should be useful for the construction of large arrays of CCDs or active pixel devices in the future in a number of areas of science and technology.
Published: 1997

19. Measurement of theBhadron energy distribution inZ0decays

Author: C. Fan, K.D. Shmakov, T.J. Pavel, R. Frey, A. P. Waite, T. Bolton, H. Staengle, Yukio Hasegawa, J. R. Johnson, R. Kajikawa, D. G. Coyne, Robert Wilson, J. A. Coller, Gilbert Shapiro, R. Verdier, T. Akagi, L. Piemontese, T. Nagamine, B. I. Einsenstein, X. Liu, S. S. Hertzbach, Henry W. Kendall, X. Yang, D. C. Williams, C. Baltay, H. Masuda, E. L. Hart, D. Aston, T. B. Moore, Enrico Pieroni, J. F. Labs, B. Bolen, D. Onoprienko, J. Schwiening, T. Schalk, V. Cook, D. Calloway, A. I. Trandafir, E. Mazzucato, A. Hasan, Michael H. Shaevitz, H. M. Steiner, Piero Giorgio Verdini, R. de Sangro, G. Mancinelli, Wit Busza, Roberto Dell'Orso, K. Hasuko, C. Vannini, J. D. Turk, R. E. Cassell, Martin Breidenbach, P.E. Rensing, M. Dima, B. Camanzi, Giancarlo Mantovani, R. Prepost, E. Church, H. Hwang, T. Junk, J. L. Harton, M. Loreti, J. Va'vra, J. J. Russell, E. Etzion, L.S. Osborne, J. Quigley, T. Takahashi, T. H. Burnett, C. Y. Prescott, P.Y.C. Du, J.J. Reidy, R. S. Panvini, D. Falciai, R. Messner, Stephen Robert Wagner, R. Dubois, J. S. Whitaker, R. A. Johnson, Stephen Watts, R. Cowan, D. Su, E. Vella, G. Baranko, A. S. Johnson, J. Wyss, Shiro Suzuki, S. L. White, M. Daoudi, N. Oishi, M. D. Hildreth, A. Chou, K.C. Moffeit, G. B. Word, P.L. Reinertsen, J.P. Venuti, C.J.S. Damerell, M. Piccolo, R.J. Plano, J. M. Yamartino, D. J. Sherden, W. J. Wisniewski, A.C. Benvenuti, N. B. Sinev, A. Sugiyama, M. Carpinelli, S. J. Yellin, S. Sen, C. H. Park, Bruce Schumm, N.M. Krishna, H. A. Neal, Yongduk Kim, M. Kalelkar, H. Kawahara, S. R. Smith, A.B. d'Oliveira, F. E. Taylor, G. Crawford, M.B. Barakat, R.D. Elia, S. Willocq, G. E. Gladding, Zihao Jiang, J. R. Bogart, A. Lu, R. K. Yamamoto, Rino Castaldi, H. O. Cohn, R. Ben-David, D. W. G. S. Leith, P.F. Jacques, J. Zhou, T. Gillman, V. V. Serbo, G. Blaylock, A. Calcaterra, S. Manly, P. C. Rowson, G. D. Punkar, N. De Groot, S. J. Hedges, W. W. Ash, R. Cotton, E. Torrence, H. J. Kang, M. Nussbaum, Minghui Liu, R. Steiner, Michael J. Fero, E. R. Weiss, R. W. Zdarko, S. Gonzalez, F. Suekane, J. A. Snyder, M.E. King, H. Yuta, M. Cavalli-Sforza, M. Langston, B. T. Meadows, K. T. Pitts, J. E. Brau, N.J. Allen, A. Lath, T. W. Reeves, O. Bardon, B. N. Ratcliff, E. W. Hughes, C. Simopoulos, K.G. Baird, S. H. Williams, A. K. McKemey, P. E. Stamer, D. O. Caldwell, Timothy Barklow, Thomas W. Markiewicz, M. E. Huffer, C. C. Young, D. J. Jackson, J. Yashima, S. Fahey, M. B. Smy, J. Ma, L. S. Rochester, G. M. Bilei, G. R. Bower, M. Swartz, James Shank, Andrea Castro, Y. Iwasaki, T. L. Usher, H. Park, G. H. Zapalac, P.J. Dervan, D. L. Wagner, U. Nauenberg, S. Narita, R. King, P. N. Burrows, Dario Bisello, Y. Ohnishi, O. H. Saxton, H. R. Band, Fred Wickens, T. Maruyama, K. Abe, M. Woods, R. R. Kofler, G. L. Bashindzhagyan, J. A. Lauber, H. L. Lynch, A. W. Weidemann, J. A. Jaros, P. M. Mockett, J. Huber, I. Karliner, M. G. Strauss, Dominik Müller, D. N. Dong, R. H. Schindler, A. Szumilo, R. Kroeger, I. M. Peruzzi, V. Lia, D. L. Burke, W. M. Bugg, A. O. Bazarko, and J. P. Fernandez
Subjects: Physics, Quark, Nuclear and High Energy Physics, Particle physics, Energy distribution, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, 7. Clean energy, 01 natural sciences, Vertex (geometry), Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Lepton
Abstract: We have measured the $B$ hadron energy distribution in ${Z}^{0}$ decays using a sample of semileptonic $B$ decays recorded in the SLD experiment at SLAC. The energy of each tagged $B$ hadron was reconstructed using information from the lepton and a partially reconstructed charm-decay vertex. We compared the scaled energy distribution with several models of heavy quark fragmentation. The average scaled energy of primary $B$ hadrons was found to be $〈{x}_{{E}_{B}}〉=0.716\ifmmode\pm\else\textpm\fi{}0.011(\mathrm{stat}{)}_{\ensuremath{-}0.022}^{+0.021}(\mathrm{syst})$.
Published: 1997

20. Measurement of theτNeutrino Helicity and Michel Parameters in Polarizede+e−Collisions

Author: K. Abe, T. Akagi, N. J. Allen, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, G. Baranko, O. Bardon, T. L. Barklow, G. L. Bashindzhagyan, A. O. Bazarko, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, T. Bolton, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, W. Busza, A. Calcaterra, D. O. Caldwell, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, A. D'Oliveira, C. J. S. Damerell, M. Daoudi, R. De Sangro, R. Dell'Orso, P. J. Dervan, M. Dima, D. N. Dong, P. Y. C. Du, R. Dubois, B. I. Eisenstein, R. Elia, E. Etzion, S. Fahey, D. Falciai, C. Fan, J. P. Fernandez, M. J. Fero, R. Frey, K. Furuno, T. Gillman, G. Gladding, S. Gonzalez, E. L. Hart, J. L. Harton, A. Hasan, Y. Hasegawa, K. Hasuko, S. J. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, H. Hwang, Y. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, H. J. Kang, I. Karliner, H. Kawahara, H. W. Kendall, Y. D. Kim, M. E. King, R. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, J. F. Labs, M. Langston, A. Lath, J. A. Lauber, D. W. G. S. Leith, V. Lia, M. X. Liu, X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, D. Muller, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, Y. Ohnishi, L. S. Osborne, R. S. Panvini, C. H. Park, H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, P. Stamer, H. Steiner, R. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, E. Torrence, A. I. Trandafir, J. D. Turk, T. Usher, J. Va'vra, C. Vannini, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, D. L. Wagner, S. R. Wagner, A. P. Waite, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, D. A. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, M. Woods, G. B. Word, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, and J. Zhou
Subjects: Physics, Particle physics, Electron–positron annihilation, General Physics and Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Helicity, Nuclear physics, Particle decay, Tau neutrino, mental disorders, Michel parameters, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Lepton
Abstract: We present a new measurement of the tau neutrino helicity, hnu and the tau Michel parameters rho, eta, xi and the product delta xi. The analysis exploits the highly polarized SLC electron beam to extract these quantities directly from a measurement of the tau decay spectra, using the 1993-1995 SLD data sample of 4328 e+e- --> Z0 --> tau+tau- events. From the decays tau --> pi nu(tau) and tau --> rho nu(tau) we obtain a combined value hnu=-0.93+/-0.10+/-0.04. The leptonic decay channels yield combined values of rho=0.72+/-0.09+/-0.03, xi=1.05+/-0.35+/-0.04 and delta xi=0.88+/-0.27+/-0.04.
Published: 1997

21. Measurement of Leading Particle Effects in Decays ofZ0Bosons into Light Flavors

Author: T. W. Reeves, A. Chou, K.C. Moffeit, R. Dubois, S. R. Smith, H. A. Neal, S. Fahey, P.L. Reinertsen, A. Sugiyama, J. M. Yamartino, C. Y. Prescott, L. S. Rochester, Stephen Watts, R. R. Kofler, J. Quigley, J. Wyss, Michael J. Fero, E. R. Weiss, C. H. Park, Bruce Schumm, D. Su, T. Bolton, M. Dima, Stephen Robert Wagner, B. N. Ratcliff, A. Lu, C. Simopoulos, M. Cavalli-Sforza, B. T. Meadows, P. E. Stamer, M.B. Barakat, M. E. Huffer, C. C. Young, J. Yashima, J. D. Turk, V. V. Serbo, N.J. Allen, R.D. Elia, G. E. Gladding, J. Schwiening, A. I. Trandafir, M. Piccolo, Gilbert Shapiro, R. E. Cassell, P.E. Rensing, R. H. Schindler, R. Verdier, E. L. Hart, T. Nagamine, M. Kalelkar, T. Schalk, G. L. Bashindzhagyan, C. Vannini, E. Etzion, A. Hasan, M. Carpinelli, Michael H. Shaevitz, A. Szumilo, M. Loreti, B. Bolen, T. H. Burnett, W. J. Wisniewski, M. Langston, J. A. Coller, S. Manly, O. Bardon, F. E. Taylor, J. R. Bogart, D. Aston, S. J. Yellin, A. Calcaterra, K. Hasuko, R. Prepost, P.F. Jacques, R. Kroeger, D. Calloway, S. Sen, G. H. Zapalac, R. K. Yamamoto, N.M. Krishna, A. P. Waite, X. Yang, D. C. Williams, S. J. Hedges, O. H. Saxton, M. Nussbaum, R. Cowan, K. T. Pitts, Shiro Suzuki, Timothy Barklow, Piero Giorgio Verdini, X. Liu, S. S. Hertzbach, R. W. Zdarko, M.E. King, J. J. Russell, S. Willocq, A. S. Johnson, R. Steiner, H. R. Band, L.S. Osborne, Rino Castaldi, H. O. Cohn, K. Furuno, Giancarlo Mantovani, W. W. Ash, R. Messner, S. Gonzalez, M. D. Hildreth, V. Cook, K.D. Shmakov, Yukio Hasegawa, H. Hwang, H. L. Lynch, J. S. Whitaker, Alberto Benvenuti, R. Ben-David, G. D. Punkar, R. de Sangro, E. Vella, R. A. Johnson, J. E. Brau, A. W. Weidemann, J. Zhou, H. Kawahara, G. B. Word, D. G. Coyne, Henry W. Kendall, D. J. Sherden, C. Fan, J.P. Venuti, D. J. Jackson, Fred Wickens, D. W. G. S. Leith, C.J.S. Damerell, R. J. Wilson, A. O. Bazarko, Martin Breidenbach, R. Cotton, Yongduk Kim, C. Baltay, E. W. Hughes, J. A. Lauber, H. Masuda, S. H. Williams, J. Ma, Minghui Liu, D. Onoprienko, G. Blaylock, B. Camanzi, G. M. Bilei, G. R. Bower, R. S. Panvini, D. Falciai, G. Crawford, M. Swartz, James Shank, Andrea Castro, Wit Busza, F. Suekane, P. C. Rowson, J. A. Jaros, P.J. Dervan, H. Yuta, D. O. Caldwell, Thomas W. Markiewicz, T. Gillman, E. Church, T. Junk, J. L. Harton, S. Narita, Tadayuki Takahashi, J. P. Fernandez, P. M. Mockett, G. Baranko, M. B. Smy, Y. Iwasaki, K.G. Baird, David A. Williams, J. Huber, T. L. Usher, S. L. White, A. K. McKemey, R. King, R.J. Plano, I. Karliner, M. G. Strauss, Dominik Müller, H. Park, T. Maruyama, Y. Ohnishi, B. I. Eisenstein, D. N. Dong, J. A. Snyder, A. Lath, I. M. Peruzzi, E. Mazzucato, A.B. d'Oliveira, E. Torrence, H. J. Kang, Roberto Dell'Orso, J. Va'vra, J.J. Reidy, N. B. Sinev, D. L. Wagner, V. Lia, U. Nauenberg, D. L. Burke, W. M. Bugg, P. N. Burrows, Dario Bisello, T.J. Pavel, R. Frey, J. R. Johnson, R. Kajikawa, H. M. Steiner, T. Akagi, L. Piemontese, T. B. Moore, Enrico Pieroni, J. F. Labs, G. Mancinelli, P.Y.C. Du, M. Daoudi, K. Abe, and M. Woods
Subjects: Quark, Physics, Antiparticle, Particle physics, Meson, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Elementary particle, Quarkonium, Nuclear physics, Particle decay, High Energy Physics::Experiment, Boson
Abstract: We present evidence for leading particle production in hadronic decays of the Z{sup 0} boson to light-flavor jets. A polarized electron beam was used to tag quark and antiquark jets, and a vertex detector was employed to reject heavy-flavor events. Charged hadrons were identified with a Cherenkov ring imaging detector. In the quark jets, more high-momentum p, L, K{sup -}, and {bar K}{sup *0} were observed than their antiparticles, and vice versa for antiquark jets, providing direct evidence that the higher-momentum particles in jets are more likely to carry the primary quark or antiquark from the Z{sup 0} decay, and that s{bar s} production is suppressed in fragmentation. {copyright} {ital 1997} {ital The American Physical Society}
Published: 1997

22. Improved Measurement of the Left-RightZ0Cross Section Asymmetry

Author: K. Abe, I. Abt, T. Akagi, N. J. Allen, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, G. Baranko, O. Bardon, T. L. Barklow, G. L. Bashindzhagyan, A. O. Bazarko, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, T. Bolton, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, W. Busza, A. Calcaterra, D. O. Caldwell, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, A. D'Oliveira, C. J. S. Damerell, M. Daoudi, R. De Sangro, R. Dell'Orso, P. J. Dervan, M. Dima, D. N. Dong, P. Y. C. Du, R. Dubois, B. I. Eisenstein, R. Elia, E. Etzion, S. Fahey, D. Falciai, C. Fan, M. J. Fero, R. Frey, K. Furuno, T. Gillman, G. Gladding, S. Gonzalez, G. D. Hallewell, E. L. Hart, J. L. Harton, A. Hasan, Y. Hasegawa, K. Hasuko, S. J. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, H. Hwang, Y. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, H. J. Kang, I. Karliner, H. Kawahara, H. W. Kendall, Y. D. Kim, M. E. King, R. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, J. F. Labs, M. Langston, A. Lath, J. A. Lauber, D. W. G. S. Leith, V. Lia, M. X. Liu, X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, D. Muller, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, Y. Ohnishi, L. S. Osborne, R. S. Panvini, C. H. Park, H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, K. Reeves, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, J. Schwiening, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, P. Stamer, H. Steiner, R. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, E. Torrence, A. I. Trandafir, J. D. Turk, T. Usher, J. Va'vra, C. Vannini, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, D. L. Wagner, S. R. Wagner, A. P. Waite, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, D. A. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, M. Woods, G. B. Word, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, and J. Zhou
Subjects: Physics, Particle physics, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, Weinberg angle, Elementary particle, Polarization (waves), Asymmetry, Linear particle accelerator, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, media_common, Boson
Abstract: We present a new measurement of the left-right cross section asymmetry (ALR) for Z boson production by e+e- collisions. The measurement was performed at a center-of-mass energy of 91.28 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (77.23+-0.52)%. Using a sample of 93,644 Z decays, we measure the pole-value of the asymmetry, ALR0, to be 0.1512+-0.0042(stat.)+-0.0011(syst.) which is equivalent to an effective weak mixing angle of sin**2(theta_eff)=0.23100+-0.00054(stat.)+-0.00014(syst.).
Published: 1997

23. The SLD VXD3 detector and its initial performance

Author: Gunther Haller, Stephen Watts, Su Dong, D. Ross, K. Abe, C.J.S. Damerell, M. E. Huffer, J. Yashima, A. Chou, K Skarpaas Viii, T. L. Usher, J. A. Snyder, T. B. Moore, J. Sinnott, R. Frey, E. Etzion, A. I. Trandafir, M. Foss, W. T. Emmet, H. Yuta, K. Hasuko, I. Lee, J. Hoeflich, J. J. Russell, J. Kelsy, L.S. Osborne, Minghui Liu, P. N. Burrows, C. Baltay, H. Masuda, A. Arodzero, M. B. Smy, E. R. Weiss, R.L. English, F. Suekane, P.J. Dervan, V. V. Serbo, G. H. Zapalac, Martin Breidenbach, D. J. Jackson, F. E. Taylor, Tadashi Nagamine, V. Lia, N. B. Sinev, G. Crawford, R. Verdier, S. Manly, L. Lintern, J. A. Jaros, J. Huber, M. G. Strauss, D. N. Dong, N. Ohishi, S. S. Hertzbach, Henry W. Kendall, and J. E. Brau
Subjects: Physics, Nuclear and High Energy Physics, Vertex (computer graphics), Upgrade, Optics, Pixel, business.industry, Detector, Beam direction, Vertex detector, business, Tracking (particle physics), Instrumentation
Abstract: The SLD collaboration completed construction of a new CCD vertex detector (VXD3) in January 1996 and started data taking in April 1996 with the new system. VXD3 is an upgrade of the original CCD vertex detector, VXD2, which had successfully operated in SLD for three years. VXD3 consists of 96 large area CCDs, each having 3.2 million 20 μm × 20 μm pixels. By reducing the detector material and lengthening the lever arm, VXD3 is expected to improve secondary vertex resolution by about a factor of two compared with VXD2. The new three-layered structure enables stand-alone tracking without any ambiguity and its extended size along the beam direction improves the polar-angle coverage to |cos θ| < 0.85. An overview of this detector system and its initial performance are described.
Published: 1997

24. First Measurement of the Left-Right Charge Asymmetry in HadronicZBoson Decays and a New Determination ofsin2θWeff

Author: K. Abe, I. Abt, T. Akagi, N. J. Allen, W. W. Ash, D. Aston, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, G. Baranko, O. Bardon, T. L. Barklow, G. L. Bashindzhagyan, A. O. Bazarko, R. Ben-David, A. C. Benvenuti, G. M. Bilei, D. Bisello, G. Blaylock, J. R. Bogart, B. Bolen, T. Bolton, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, W. Busza, A. Calcaterra, D. O. Caldwell, D. Calloway, B. Camanzi, M. Carpinelli, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, A. Chou, E. Church, H. O. Cohn, J. A. Coller, V. Cook, R. Cotton, R. F. Cowan, D. G. Coyne, G. Crawford, A. D'Oliveira, C. J. S. Damerell, M. Daoudi, R. De Sangro, R. Dell'Orso, P. J. Dervan, M. Dima, D. N. Dong, P. Y. C. Du, R. Dubois, B. I. Eisenstein, R. Elia, E. Etzion, S. Fahey, D. Falciai, C. Fan, M. J. Fero, R. Frey, K. Furuno, T. Gillman, G. Gladding, S. Gonzalez, G. D. Hallewell, E. L. Hart, J. L. Harton, A. Hasan, Y. Hasegawa, K. Hasuko, S. Hedges, S. S. Hertzbach, M. D. Hildreth, J. Huber, M. E. Huffer, E. W. Hughes, H. Hwang, Y. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, H. J. Kang, I. Karliner, H. Kawahara, H. W. Kendall, Y. D. Kim, M. E. King, R. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, J. F. Labs, M. Langston, A. Lath, J. A. Lauber, D. W. G. S. Leith, V. Lia, M. X. Liu, X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, A. K. McKemey, B. T. Meadows, R. Messner, P. M. Mockett, K. C. Moffeit, T. B. Moore, D. Muller, T. Nagamine, S. Narita, U. Nauenberg, H. Neal, M. Nussbaum, Y. Ohnishi, L. S. Osborne, R. S. Panvini, C. H. Park, H. Park, T. J. Pavel, I. Peruzzi, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, J. Reidy, P. L. Reinertsen, P. E. Rensing, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, R. H. Schindler, B. A. Schumm, S. Sen, V. V. Serbo, M. H. Shaevitz, J. T. Shank, G. Shapiro, D. J. Sherden, K. D. Shmakov, C. Simopoulos, N. B. Sinev, S. R. Smith, M. B. Smy, J. A. Snyder, P. Stamer, H. Steiner, R. Steiner, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, E. Torrence, A. I. Trandafir, J. D. Turk, T. Usher, J. Va'vra, C. Vannini, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, D. L. Wagner, S. R. Wagner, A. P. Waite, S. J. Watts, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. L. White, F. J. Wickens, D. A. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, M. Woods, G. B. Word, J. Wyss, R. K. Yamamoto, J. M. Yamartino, X. Yang, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, and J. Zhou
Subjects: Physics, Particle physics, Particle decay, Electron–positron annihilation, media_common.quotation_subject, Hadron, General Physics and Astronomy, Weinberg angle, Elementary particle, Asymmetry, Boson, media_common
Abstract: We present the first measurement of the left-right charge asymmetry ${A}_{Q}^{\mathrm{obs}}$ in hadronic $Z$ boson decays. This was performed at ${E}_{\mathrm{c}.\mathrm{m}.}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}91.27\mathrm{GeV}$ with the SLD at the SLAC Linear Collider with a polarized electron beam. Using 89 838 events we obtain ${A}_{Q}^{\mathrm{obs}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.225\ifmmode\pm\else\textpm\fi{}0.056\ifmmode\pm\else\textpm\fi{}0.019$, which leads to a measurement of the electron left-right asymmetry parameter, ${A}_{e}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.162\ifmmode\pm\else\textpm\fi{}0.041\ifmmode\pm\else\textpm\fi{}0.014$, and ${sin}^{2}{\ensuremath{\theta}}_{W}^{\mathrm{eff}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.2297\ifmmode\pm\else\textpm\fi{}0.0052\ifmmode\pm\else\textpm\fi{}0.0018$. Also, the ${A}_{Q}^{\mathrm{obs}}$ measurement combined with the left-right cross section asymmetry determines ${A}_{e}$ independent of the value of the electron-beam polarization.
Published: 1997

25. Measurements ofRbwith impact parameters and displaced vertices

Author: J. M. Yamartino, Elliot Hughes, G. Mancinelli, J. E. Brau, G. M. Bilei, G. R. Bower, James Shank, S. H. Williams, Andrea Castro, E. Church, T. Junk, O. H. Saxton, H. R. Band, P. De Simone, A. P. Waite, T. Bolton, C. Y. Prescott, J.P. Venuti, R.D. Elia, M. Carpinelli, A. Calcaterra, E. Torrence, C.J.S. Damerell, R. J. Wilson, A. S. Johnson, M. Loreti, John Scott Whitaker, G. E. Gladding, A. O. Bazarko, Y.D. Kim, R. Steiner, T. Akagi, S. Gonzalez, Gilbert Shapiro, C. J. Ahn, J. Huber, G. H. Zapalac, D. Su, R. Verdier, M. Nussbaum, S. Willocq, Fred Wickens, E. L. Hart, C. Baltay, L. Piemontese, R.J. Plano, H. Masuda, J. Wyss, M. Dima, H. M. Steiner, M. Piccolo, P. M. Mockett, G. Baranko, M. Langston, B. N. Ratcliff, Thomas W. Markiewicz, Enrico Pieroni, A. Lu, E. Etzion, S. Smith, S. F. Schaffner, C. Zeitlin, C. Simopoulos, O. Bardon, P. E. Stamer, B. A. Schumm, J. F. Labs, K.G. Baird, S. Hedges, David A. Williams, Timothy Barklow, A. K. McKemey, Zhihua Zhang, Roberto Dell'Orso, G. Blaylock, B. Camanzi, R. S. Panvini, D. L. Burke, D. Falciai, R. Cotton, I. Karliner, M. G. Strauss, W. M. Bugg, Richard Dubois, J. Quigley, M. Kalelkar, D. J. Jackson, A. Sugiyama, Minghui Liu, Wit Busza, H.J. Kang, J.J. Reidy, S. L. White, Stephen Robert Wagner, U. Schneekloth, B. I. Eisenstein, D. J. Sherden, J. Ma, T. W. Reeves, Koji Abe, P. C. Rowson, F. Suekane, Rino Castaldi, H. O. Cohn, R. Prepost, H. Yuta, P.F. Jacques, R. Massetti, J. Rothberg, I. Abt, R. Messner, D. W. G. S. Leith, R. H. Schindler, K.C. Moffeit, A. W. Weidemann, E. Vella, X. Yang, T.J. Pavel, D. C. Williams, N. B. Sinev, I. M. Peruzzi, E. Mazzucato, S. L. Shapiro, K. Furuno, Shiro Suzuki, A. Szumilo, G. D. Punkar, T. Schalk, V.V. Serbo, R. Frey, L.S. Rochester, Y. Iwasaki, T. L. Usher, F. E. Taylor, Yukio Hasegawa, T. Maruyama, T. Gillman, J. A. Snyder, H. Park, G. B. Word, M.E. Huffer, A.B. d'Oliveira, J. R. Bogart, D. G. Coyne, J. A. Coller, R. Kroeger, J. R. Johnson, R. Kajikawa, Martin Breidenbach, T. Bienz, R. Ben-David, Stephen Watts, Melody A. Swartz, J. Zhou, C. Vannini, M. Woods, J. J. Russell, L.S. Osborne, R. K. Yamamoto, Philip Burrows, R. E. Cassell, P.E. Rensing, H. L. Lynch, R. A. Johnson, V. Cook, R. de Sangro, W. J. Wisniewski, D. Aston, P.Y.C. Du, A. Seiden, G. Hallewell, S. J. Yellin, S. Manly, M.B. Barakat, R. Cowan, S. Sen, C. C. Young, N.M. Krishna, J. A. Jaros, M. Daoudi, Piero Giorgio Verdini, Dario Bisello, D. Calloway, Alberto Benvenuti, W. W. Ash, Michael J. Fero, E. R. Weiss, H. Kawahara, Tadayuki Takahashi, R. W. Zdarko, M.E. King, K.D. Shmakov, Giancarlo Mantovani, B. Mours, M. Cavalli-Sforza, B. T. Meadows, H. Hwang, R. King, M. H. Shaevitz, N.J. Allen, K. T. Pitts, J. Va’vra, Y. Ohnishi, M. D. Hildreth, D. O. Caldwell, X. Liu, S. S. Hertzbach, Henry W. Kendall, T. H. Burnett, Amitabh Lath, G. Muller, R. R. Kofler, J. A. Lauber, and J. D. Turk
Subjects: Physics, Nuclear and High Energy Physics, Interaction point, Pixel, Electron–positron annihilation, Vertex detector, Atomic physics, Impact parameter, Vertex (geometry)
Abstract: We present measurements of Rb using the SLD at the SLC. The analyses use 2D and 3D impact parameter tags and a displaced 3D vertex tag which all exploit the small size and stability of the e+e- interaction point and the precision 3D CCD pixel vertex detector to achieve high bb¯-tagging efficiencies and purities. The combined measurement yields Rb=0.229±0.011 and is consistent with standard model predictions.
Published: 1996

26. Measurement of the Left-Right Forward-Backward Asymmetry for Charm Quarks withD*+andD+Mesons

Author: E. Church, T. Junk, A. P. Waite, P. Stamer, I. M. Peruzzi, Gian Mario Bilei, R.J. Plano, E. R. Weiss, A. Seiden, R. Cotton, C. Y. Prescott, K.G. Baird, D. Falciai, W. J. Wisniewski, U. Nauenberg, M. Dima, David A. Williams, A. K. McKemey, S. Willocq, N.J. Allen, F. E. Taylor, J. R. Bogart, D. Su, D. L. Burke, U. Schneekloth, G. Blaylock, Alberto Benvenuti, W. M. Bugg, M. Piccolo, T. Schalk, R. Dubois, R. Messner, G. Mancinelli, P.Y.C. Du, F. Suekane, Brian Meadows, H. Kawahara, D. J. Sherden, C. C. Young, E. Vella, Y. Ohnishi, P. N. Burrows, A. Szumilo, D. W. G. S. Leith, Dario Bisello, S. R. Smith, Rafe Schindler, M. Daoudi, T. Bienz, R. K. Yamamoto, T. W. Reeves, Koji Abe, R. Prepost, M. J. Fero, Robert Wilson, H. M. Steiner, P.F. Jacques, J. J. Russell, X. Yang, D. C. Williams, R. Ben-David, J. A. Coller, A. S. Johnson, J. M. Yamartino, J. Zhou, R. Kroeger, B. Mours, A. O. Bazarko, M. G. Strauss, T. Akagi, J. S. Whitaker, L. Piemontese, M. Nussbaum, K. T. Pitts, S. J. Yellin, B. Camanzi, S. Sen, Enrico Pieroni, R. King, Shinzo Suzuki, C. Simopoulos, D. J. Jackson, Martin Breidenbach, J. A. Snyder, M. Langston, A. Lu, J. E. Brau, A. Calcaterra, T. Gillman, A. Lath, J.P. Venuti, J. F. Labs, A. W. Weidemann, O. Bardon, David O. Caldwell, C.J.S. Damerell, S. Manly, N.M. Krishna, B. N. Ratcliff, V. Cook, R. de Sangro, C. Fan, T.J. Pavel, B. A. Schumm, R. Frey, L. S. Osborne, R.D. Elia, R. W. Zdarko, R.A. Johnson, M.E. King, G. Hallewell, G. E. Gladding, T. Bolton, Timothy Barklow, J. Ma, E. W. Hughes, Zhihua Zhang, C. Baltay, H. Masuda, M. E. Huffer, J. R. Johnson, O. H. Saxton, E. Mazzucato, E. Torrence, V. V. Serbo, H. R. Band, Gilbert Shapiro, J. A. Jaros, M. Cavalli-Sforza, R. Verdier, E. L. Hart, S. H. Williams, R. S. Panvini, Y. Iwasaki, T. L. Usher, Wit Busza, M. Woods, Fred Wickens, H. Park, H. A. Neal, P. M. Mockett, J. Huber, K.C. Moffeit, M. D. Hildreth, G. R. Bower, James Shank, I. Karliner, Dominik Müller, Andrea Castro, K. Furuno, T. Maruyama, C. Vannini, P. De Simone, Michael H. Shaevitz, Yukio Hasegawa, M. Loreti, Roberto Dell'Orso, J. Va'vra, B. I. Eisenstein, D. G. Coyne, T. Nagamine, Y. Kim, R. Steiner, S. Gonzalez, A. Sugiyama, H. L. Lynch, J. Rothberg, I. Abt, D. Aston, D. Calloway, N. B. Sinev, S. Hedges, G. B. Word, M. Swartz, J. Wyss, C. Zeitlin, R. Kajikawa, G. H. Zapalac, M. Kalelkar, P. C. Rowson, H. Yuta, C. J. Ahn, Stephen Watts, M.B. Barakat, S. L. Shapiro, Rino Castaldi, H. O. Cohn, R. Massetti, G. D. Punkar, X. Liu, J. D. Turk, S. S. Hertzbach, L. S. Rochester, M. Carpinelli, Henry W. Kendall, W. W. Ash, R. E. Cassell, P.E. Rensing, T. H. Burnett, J. A. Lauber, R. Cowan, J. Quigley, T. Takahashi, Stephen Robert Wagner, G. Muller, R. R. Kofler, Piero Giorgio Verdini, Giancarlo Mantovani, H. Hwang, G. Baranko, S. L. White, A.B. d'Oliveira, and Thomas W. Markiewicz
Subjects: Physics, Particle physics, Meson, media_common.quotation_subject, Hadron, General Physics and Astronomy, Forward backward, Asymmetry, Charm quark, media_common
Abstract: We present a direct measurement of {ital A}{sub {ital c}}=2{ital v}{sub {ital c}}{ital a}{sub {ital c}}/({ital v}{sup 2}{sub {ital c}}+{ital a}{sup 2}{sub {ital c}}) from the left-right forward-backward asymmetry of {ital D}{sup *}+ and {ital D}{sup +} mesons in {ital Z}{sup 0} events produced with the longitudinally polarized SLAC Linear Collider beam. These {ital Z}{sup 0}{r_arrow}{ital c} over bar events are tagged on the basis of event kinematics and decay topology from a sample of hadronic {ital Z}{sup 0} decays recorded by the SLAC Large Detector. We measure {ital A}{sup 0}{sub {ital c}} = 0.73 {plus_minus} 0.22(stat) {plus_minus} 0.10(syst). {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.
Published: 1995

27. Measurement of the AverageBHadron Lifetime inZ0Decays Using Reconstructed Vertices

Author: X. Yang, D. C. Williams, R. Ben-David, J. Zhou, Martin Breidenbach, Stephen Watts, M. D. Hildreth, J. Reidy, C. Y. Prescott, D. Su, U. Nauenberg, M. Piccolo, M.B. Barakat, Gian Mario Bilei, P. N. Burrows, M. G. Strauss, T. Akagi, R. Dubois, L. Piemontese, B. Camanzi, Robert Wilson, Enrico Pieroni, J. F. Labs, J. A. Coller, Dario Bisello, J. M. Yamartino, R. Cotton, E. Church, K. T. Pitts, T. Junk, Y. Ohnishi, I. M. Peruzzi, G. R. Bower, J. Quigley, T. Takahashi, James Shank, V. Cook, R. de Sangro, Michael J. Fero, Minghui Liu, S. Hedges, T. Nagamine, Andrea Castro, M. Nussbaum, T. Gillman, G. Hallewell, U. Schneekloth, S. Willocq, Y. Kim, Stephen Robert Wagner, R.J. Plano, V. V. Serbo, A. Sugiyama, D. Aston, A. Seiden, F. Suekane, Brian Meadows, N.J. Allen, D. Calloway, M. Carpinelli, S. F. Schaffner, S. L. Shapiro, K.D. Shmakov, W. J. Wisniewski, J. Ma, J. A. Snyder, F. E. Taylor, G. B. Word, J. R. Bogart, A. Lath, E. Torrence, H. J. Kang, D. Falciai, T. Bolton, Y. Iwasaki, T. L. Usher, H. Park, G. Blaylock, D. J. Sherden, B. Mours, Rafe Schindler, D. W. G. S. Leith, A. S. Johnson, Roberto Dell'Orso, H. A. Neal, C. Baltay, H. Masuda, J. Va'vra, R.D. Elia, G. E. Gladding, M. Swartz, W. W. Ash, Gilbert Shapiro, Shinzo Suzuki, M. Langston, A. I. Trandafir, O. Bardon, David O. Caldwell, A. P. Waite, H. L. Lynch, J. Rothberg, H. Kawahara, S. Manly, I. Abt, R. Verdier, J. Wyss, E. R. Weiss, R. E. Cassell, P.E. Rensing, Timothy Barklow, N. B. Sinev, E. L. Hart, T. H. Burnett, R. Cowan, C. Zeitlin, C. Fan, Wit Busza, R. Kajikawa, R. King, T.J. Pavel, D. J. Jackson, K. Furuno, R. W. Zdarko, B. A. Schumm, R. Frey, Yukio Hasegawa, G. H. Zapalac, M.E. King, S. R. Smith, T. W. Reeves, M. Kalelkar, Koji Abe, J. R. Johnson, P. Stamer, J. D. Turk, P. C. Rowson, H. Yuta, A. W. Weidemann, J. A. Lauber, L. S. Rochester, K.G. Baird, H. M. Steiner, David A. Williams, A. K. McKemey, R. Messner, E. Vella, A.C. Benvenuti, C. Simopoulos, A. Lu, X. Liu, Piero Giorgio Verdini, S. S. Hertzbach, J. A. Jaros, Zhihua Zhang, Rino Castaldi, H. O. Cohn, M. E. Huffer, Henry W. Kendall, Giancarlo Mantovani, R. Massetti, R. Prepost, H. Hwang, P.F. Jacques, G. D. Punkar, G. Muller, R. R. Kofler, A. Szumilo, D. L. Burke, K.C. Moffeit, W. M. Bugg, R. Kroeger, M. Cavalli-Sforza, M. Woods, G. Mancinelli, P.Y.C. Du, R. Steiner, M. Daoudi, S. Gonzalez, C. J. Ahn, A. O. Bazarko, J. E. Brau, Thomas W. Markiewicz, C. Vannini, A. Calcaterra, P. M. Mockett, P. De Simone, Michael H. Shaevitz, J. Huber, G. Baranko, M. Loreti, T. Maruyama, E. W. Hughes, S. L. White, S. H. Williams, I. Karliner, Dominik Müller, B. N. Ratcliff, B. I. Eisenstein, A.B. d'Oliveira, L. S. Osborne, R.A. Johnson, E. Mazzucato, D. G. Coyne, O. H. Saxton, H. R. Band, R. S. Panvini, Fred Wickens, C. C. Young, T. Schalk, S. J. Yellin, S. Sen, N.M. Krishna, R. K. Yamamoto, J. J. Russell, J. S. Whitaker, J.P. Venuti, C.J.S. Damerell, and M. Dima
Subjects: Nuclear physics, Physics, Particle decay, Particle physics, Maximum likelihood, Hadron, Decay length, General Physics and Astronomy, B meson
Abstract: We report a measurement of the average {ital B} hadron lifetime using data collected with the SLD detector at the SLAC Linear Collider in 1993. An inclusive analysis selected three-dimensional vertices with {ital B} hadron lifetime information in a sample of 50{times}10{sup 3} {ital Z}{sup 0} decays. A lifetime of 1.564{plus_minus}0.030(stat){plus_minus}0.036(syst) ps was extracted from the decay length distribution of these vertices using a binned maximum likelihood method. {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.
Published: 1995

28. Measurement of the Parity-Violation ParameterAbfrom the Left-Right Forward-Backward Asymmetry ofbQuark Production inZ0Decays Using a Momentum-Weighted Track-Charge Technique

Author: D. J. Sherden, D. W. G. S. Leith, Roberto Dell'Orso, G. R. Bower, P. C. Rowson, James Shank, Andrea Castro, Stephen Watts, A. Szumilo, C. Y. Prescott, J. Va'vra, H. Yuta, Shinzo Suzuki, M. Langston, T. Schalk, O. Bardon, David O. Caldwell, Timothy Barklow, T. Maruyama, D. Su, K.C. Moffeit, H. L. Lynch, J. Rothberg, I. Abt, M. Dima, G. Shapiro, C. Baltay, H. Masuda, M.B. Barakat, R. Kroeger, G. Mancinelli, P.Y.C. Du, W. J. Wisniewski, E. Church, T. Junk, M. Piccolo, F. E. Taylor, S. Dasu, R. King, S. Hedges, N. B. Sinev, Rino Castaldi, H. O. Cohn, T. Bienz, R. Massetti, R. K. Yamamoto, D. Falciai, G. D. Punkar, S. Manly, J. R. Bogart, A. S. Johnson, A. W. Weidemann, J. A. Lauber, Wit Busza, J. M. Yamartino, T. Bolton, B. Camanzi, G. B. Word, R. Steiner, R.J. Plano, S. Gonzalez, J. Quigley, T. Takahashi, C. J. Ahn, C. Simopoulos, A. Lu, R. W. Zdarko, M.E. King, M. Cavalli-Sforza, J. J. Russell, B. Mours, Stephen Robert Wagner, M. Woods, C. C. Young, X. Yang, J. S. Whitaker, M. Swartz, M. G. Strauss, M. E. Huffer, D. C. Williams, R. Ben-David, T. Akagi, P. Stamer, L. Piemontese, Rafe Schindler, T. Nagamine, Robert Wilson, J. A. Snyder, R. A. Johnson, J. Zhou, Enrico Pieroni, Y. Kim, J. A. Coller, J. A. Jaros, R. Kajikawa, A. Lath, C. Vannini, Michael J. Fero, G. H. Zapalac, J. F. Labs, A. Sugiyama, D. Aston, K. T. Pitts, K.G. Baird, R. E. Cassell, A. P. Waite, P. De Simone, Michael H. Shaevitz, P.E. Rensing, L. Pescara, J. D. Turk, Martin Breidenbach, S. L. Shapiro, S. J. Yellin, David A. Williams, E. L. Hart, S. Willocq, M. Loreti, A. K. McKemey, D. Calloway, J.P. Venuti, M. Carpinelli, J. E. Brau, T. H. Burnett, G. Blaylock, Gian Mario Bilei, A. Calcaterra, B. A. Schumm, V. Cook, R. de Sangro, S. Sen, R. Cowan, R. Messner, V. V. Serbo, L. S. Rochester, P. M. Mockett, E. Vella, G. Hallewell, J. Huber, H. Steiner, L. S. Osborne, N.M. Krishna, W. W. Ash, R. Cotton, H. A. Neal, M. D. Hildreth, O. H. Saxton, X. Liu, S. R. Smith, R. Dubois, I. Karliner, Dominik Müller, T. W. Reeves, S. S. Hertzbach, E. W. Hughes, S. H. Williams, H. R. Band, B. I. Eisenstein, Henry W. Kendall, Koji Abe, Y. Ohnishi, K. Furuno, R. S. Panvini, G. Muller, R. R. Kofler, Fred Wickens, U. Schneekloth, J. Wyss, Yukio Hasegawa, C. Zeitlin, D. G. Coyne, F. Suekane, Brian Meadows, M. Kalelkar, R.D. Elia, G. E. Gladding, A.C. Benvenuti, T. Gillman, E. Torrence, A. Seiden, H. Kawahara, C. Fan, T.J. Pavel, R. Frey, J. R. Johnson, R. Prepost, P.F. Jacques, G. Baranko, S. L. White, A.B. d'Oliveira, U. Nauenberg, P. N. Burrows, Dario Bisello, Y. Iwasaki, T. L. Usher, H. Park, A. O. Bazarko, M. Nussbaum, C.J.S. Damerell, B. N. Ratcliff, Nicola Bacchetta, I. M. Peruzzi, E. Mazzucato, Thomas W. Markiewicz, J. Ma, D. L. Burke, W. M. Bugg, Piero Giorgio Verdini, Giancarlo Mantovani, and H. Hwang
Subjects: Physics, Quark, Particle physics, Particle decay, media_common.quotation_subject, Electron–positron annihilation, General Physics and Astronomy, Parity (physics), Impact parameter, Polarization (waves), Asymmetry, Bottom quark, media_common
Abstract: Using an impact parameter tag to select an enriched sample of {ital Z}{sup 0}{r_arrow}{ital bb}{ovr bar} events, and the net momentum-weighted track charge to identify the sign of the charge of the underlying {ital b} quark, we have measured the left-right forward-backward asymmetry for {ital b} quark production as a function of polar angle. Based on 1.8pb{sup {minus}1} of {ital Z}{sup 0} decay data produced with a mean electron beam polarization of {ital P}{sub {ital e}}=63%, this yields a direct measurement of the extent of parity violation in the {ital Zbb} coupling of {ital A}{sub {ital b}}=0.87{plus_minus}0.11(stat){plus_minus}0.09(syst).
Published: 1995

29. Polarized Bhabha Scattering and a Precision Measurement of the Electron Neutral Current Couplings

Author: C. Fan, T.J. Pavel, C. Simopoulos, R. Frey, M. Dima, A. Lu, G. M. Bilei, G. R. Bower, J. R. Johnson, James Shank, R. E. Cassell, P.E. Rensing, Andrea Castro, S. Dasu, M. E. Huffer, Robert Wilson, J. A. Coller, K. T. Pitts, V. Cook, R. de Sangro, G. Hallewell, T. H. Burnett, J. Wyss, K. Furuno, Yukio Hasegawa, D. Falciai, R. Cowan, C. Zeitlin, R. Kajikawa, Rafe Schindler, H. Steiner, D. G. Coyne, I. M. Peruzzi, E. Mazzucato, R. Ben-David, J. Zhou, T. Bolton, R. Dubois, C. C. Young, G. H. Zapalac, M. Kalelkar, A. Seiden, H. A. Neal, K.C. Moffeit, G. Shapiro, B. Camanzi, R. Steiner, P.Y.C. Du, B. Mours, S. Gonzalez, E. L. Hart, G. Blaylock, S. J. Yellin, Alberto Benvenuti, C. J. Ahn, R.D. Elia, G. E. Gladding, C. Y. Prescott, S. Sen, Y. Ohnishi, W. J. Wisniewski, J. E. Brau, N.M. Krishna, A. S. Johnson, H. Kawahara, A. O. Bazarko, A. Calcaterra, Y. Iwasaki, T. L. Usher, J.P. Venuti, H. Park, F. E. Taylor, T. Maruyama, D. J. Sherden, J. M. Yamartino, C.J.S. Damerell, J. R. Bogart, C. Baltay, H. Masuda, J. Quigley, T. Takahashi, B. N. Ratcliff, R. King, T. Gillman, T. Nagamine, E. W. Hughes, S. H. Williams, D. W. G. S. Leith, C. Vannini, P. De Simone, Michael H. Shaevitz, L. Pescara, S. Hedges, Stephen Robert Wagner, D. Su, Y. Kim, M. Carpinelli, P. Stamer, M. Loreti, Wit Busza, A. P. Waite, D. L. Burke, O. H. Saxton, W. M. Bugg, M. Piccolo, M. Cavalli-Sforza, A. Sugiyama, G. B. Word, M. Nussbaum, D. Aston, R. Cotton, H. R. Band, Shinzo Suzuki, Nicola Bacchetta, M. Woods, V. V. Serbo, Thomas W. Markiewicz, U. Schneekloth, E. Torrence, Rino Castaldi, H. O. Cohn, R. Massetti, D. Calloway, M. Langston, O. Bardon, David O. Caldwell, M. G. Strauss, T. Akagi, L. Piemontese, F. Suekane, G. Baranko, G. D. Punkar, J. D. Turk, W. W. Ash, Brian Meadows, B. A. Schumm, Enrico Pieroni, M. Swartz, R. S. Panvini, S. L. White, L. S. Rochester, Timothy Barklow, S. R. Smith, J. F. Labs, T. W. Reeves, Koji Abe, T. Schalk, Michael J. Fero, X. Yang, K.G. Baird, J. Ma, Fred Wickens, D. C. Williams, A.B. d'Oliveira, David A. Williams, A. K. McKemey, S. Willocq, U. Nauenberg, M. D. Hildreth, S. L. Shapiro, T. Bienz, Martin Breidenbach, Roberto Dell'Orso, R. K. Yamamoto, Stephen Watts, Piero Giorgio Verdini, P. N. Burrows, Dario Bisello, J. Va'vra, Giancarlo Mantovani, P. C. Rowson, H. Hwang, J. J. Russell, R. Messner, M.B. Barakat, L.S. Osborne, J. A. Snyder, J. S. Whitaker, H. L. Lynch, J. Rothberg, R. A. Johnson, H. Yuta, I. Abt, E. Vella, N. B. Sinev, G. Mancinelli, E. Church, T. Junk, R.J. Plano, S. Manly, R. W. Zdarko, M.E. King, R. Prepost, P.F. Jacques, X. Liu, S. S. Hertzbach, Henry W. Kendall, A. W. Weidemann, Amitabh Lath, G. Muller, R. R. Kofler, J. A. Lauber, J. A. Jaros, A. Szumilo, R. Kroeger, P. M. Mockett, J. Huber, I. Karliner, Dominik Müller, B. I. Eisenstein, Abe, K, Abt, I, Ahn, C, Akagi, T, Ash, W, Aston, D, Bacchetta, N, Baird, K, Baltay, C, Band, H, Barakat, M, Baranko, G, Bardon, O, Barklow, T, Bazarko, A, Bendavid, R, Benvenuti, A, Bienz, T, Bilei, G, Bisello, D, Blaylock, G, Bogart, J, Bolton, T, Bower, G, Brau, J, Breidenbach, M, Bugg, W, Burke, D, Burnett, T, Burrows, P, Busza, W, Calcaterra, A, Caldwell, D, Calloway, D, Camanzi, B, Carpinelli, M, Cassell, R, Castaldi, R, Castro, A, Cavallisforza, M, Church, E, Cohn, H, Coller, J, Cook, V, Cotton, R, Cowan, R, Coyne, D, Doliveira, A, Damerell, C, Dasu, S, Desangro, R, Desimone, P, Dellorso, R, Dima, M, Du, P, Dubois, R, Eisenstein, B, Elia, R, Falciai, D, Fan, C, Fero, M, Frey, R, Furuno, K, Gillman, T, Gladding, G, Gonzalez, S, Hallewell, G, Hart, E, Hasegawa, Y, Hedges, S, Hertzbach, S, Hildreth, M, Huber, J, Huffer, M, Hughes, E, Hwang, H, Iwasaki, Y, Jacques, P, Jaros, J, Johnson, A, Johnson, J, Johnson, R, Junk, T, Kajikawa, R, Kalelkar, M, Karliner, I, Kawahara, H, Kendall, H, Kim, Y, King, M, King, R, Kofler, R, Krishna, N, Kroeger, R, Labs, J, Langston, M, Lath, A, Lauber, J, Leith, D, Liu, X, Loreti, M, Lu, A, Lynch, H, Ma, J, Mancinelli, G, Manly, S, Mantovani, G, Markiewicz, T, Maruyama, T, Massetti, R, Masuda, H, Mazzucato, E, Mckemey, A, Meadows, B, Messner, R, Mockett, P, Moffeit, K, Mours, B, Muller, G, Muller, D, Nagamine, T, Nauenberg, U, Neal, H, Nussbaum, M, Ohnishi, Y, Osborne, L, Panvini, R, Park, H, Pavel, T, Peruzzi, I, Pescara, L, Piccolo, M, Piemontese, L, Pieroni, E, Pitts, K, Plano, R, Prepost, R, Prescott, C, Punkar, G, Quigley, J, Ratcliff, B, Reeves, T, Rensing, P, Rochester, L, Rothberg, J, Rowson, P, Russell, J, Saxton, O, Schalk, T, Schindler, R, Schneekloth, U, Schumm, B, Seiden, A, Sen, S, Serbo, V, Shaevitz, M, Shank, J, Shapiro, G, Shapiro, S, Sherden, D, Simopoulos, C, Sinev, N, Smith, S, Snyder, J, Stamer, P, Steiner, H, Steiner, R, Strauss, M, Su, D, Suekane, F, Sugiyama, A, Suzuki, S, Swartz, M, Szumilo, A, Takahashi, T, Taylor, F, Torrence, E, Turk, J, Usher, T, Vavra, J, Vannini, C, Vella, E, Venuti, J, Verdini, P, Wagner, S, Waite, A, Watts, S, Weidemann, A, Whitaker, J, White, S, Wickens, F, Williams, D, Williams, S, Willocq, S, Wilson, R, Wisniewski, W, Woods, M, Word, G, Wyss, J, Yamamoto, R, Yamartino, J, Yang, X, Yellin, S, Young, C, Yuta, H, Zapalac, G, Zdarko, R, Zeitlin, C, and Zhou, J
Subjects: 010302 applied physics, Physics, Coupling, Particle physics, Neutral current, 010308 nuclear & particles physics, FOS: Physical sciences, General Physics and Astronomy, Resonance, Weinberg angle, Electron, 01 natural sciences, Physics::History of Physics, High Energy Physics - Experiment, Standard Model, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, High Energy Physics::Experiment, Bhabha scattering
Abstract: We present the first measurement of the left-right asymmetry in Bhabha scattering with a polarized electron beam. The effective electron vector and axial vector couplings to the Z0 are extracted from a combined analysis of the polarized Bhabha scattering data and the left-right asymmetry previously published by this collaboration., PHYZZX, 17 pages, SLAC-PUB-6605
Published: 1995

30. Measurement of the Parity-Violation ParametersAbandAcfrom the Left-Right Forward-Backward Asymmetry of Leptons in Hadronic Events at theZ0Resonance

Author: C. Y. Prescott, G. R. Bower, James Shank, D. Su, Andrea Castro, D. Falciai, J.P. Venuti, C.J.S. Damerell, M. Dima, L. S. Osborne, M. Piccolo, E. Church, T. Junk, J. A. Snyder, A. Lath, M. Nussbaum, A. P. Waite, A. Seiden, R.J. Plano, Rino Castaldi, H. O. Cohn, R. Massetti, H. A. Neal, O. H. Saxton, G. Blaylock, R.D. Elia, G. E. Gladding, G. D. Punkar, C. Baltay, H. Masuda, Shinzo Suzuki, J. Ma, H. R. Band, Rafe Schindler, Alberto Benvenuti, M. Langston, O. Bardon, T. Gillman, Wit Busza, U. Nauenberg, R. Ben-David, David O. Caldwell, R. S. Panvini, Fred Wickens, H. Kawahara, S. Hedges, G. B. Word, Robert Wilson, T. Schalk, C. C. Young, X. Yang, J. Zhou, D. C. Williams, J. Quigley, T. Takahashi, Timothy Barklow, Stephen Robert Wagner, J. A. Coller, E. Torrence, J. E. Brau, A. Calcaterra, K. T. Pitts, T. Bienz, R. K. Yamamoto, S. Dasu, S. J. Yellin, S. Sen, P. N. Burrows, Dario Bisello, L. Pescara, N.M. Krishna, J. D. Turk, Martin Breidenbach, T. Nagamine, M. Carpinelli, M. Swartz, A. S. Johnson, V. Cook, R. de Sangro, J. J. Russell, R. King, J. M. Yamartino, Roberto Dell'Orso, L. S. Rochester, K. Furuno, G. Hallewell, J. Va'vra, Y. Iwasaki, T. L. Usher, Yukio Hasegawa, R. Kajikawa, H. Park, J. S. Whitaker, E. W. Hughes, H. L. Lynch, S. H. Williams, J. Rothberg, I. Abt, Y. Kim, D. J. Sherden, R. A. Johnson, G. H. Zapalac, D. G. Coyne, C. Fan, A. Sugiyama, W. W. Ash, D. Aston, D. W. G. S. Leith, B. Mours, N. B. Sinev, T.J. Pavel, T. Maruyama, Gian Mario Bilei, R. Frey, R. Prepost, V. V. Serbo, R. Cotton, P.F. Jacques, J. R. Johnson, D. Calloway, P. C. Rowson, R. E. Cassell, P.E. Rensing, U. Schneekloth, H. Yuta, F. Suekane, Brian Meadows, T. H. Burnett, B. A. Schumm, R. Steiner, R. Cowan, S. Gonzalez, C. J. Ahn, H. Steiner, M. D. Hildreth, J. Wyss, C. Zeitlin, B. Camanzi, M. Kalelkar, K.C. Moffeit, G. Shapiro, R. Messner, A. O. Bazarko, E. Vella, M. G. Strauss, T. Akagi, L. Piemontese, S. R. Smith, T. W. Reeves, Koji Abe, B. N. Ratcliff, Enrico Pieroni, P. Stamer, J. F. Labs, K.G. Baird, David A. Williams, A. K. McKemey, T. Bolton, I. M. Peruzzi, E. Mazzucato, S. Manly, R. W. Zdarko, M.E. King, E. L. Hart, Stephen Watts, M.B. Barakat, C. Vannini, M. Cavalli-Sforza, D. L. Burke, P. De Simone, Michael H. Shaevitz, W. M. Bugg, S. L. Shapiro, M. Loreti, M. Woods, C. Simopoulos, G. Mancinelli, P.Y.C. Du, A. Lu, G. Baranko, S. L. White, A. W. Weidemann, M. E. Huffer, A.B. d'Oliveira, J. A. Jaros, P. M. Mockett, J. Huber, Piero Giorgio Verdini, I. Karliner, Dominik Müller, B. I. Eisenstein, A. Szumilo, Giancarlo Mantovani, M. J. Fero, R. Kroeger, H. Hwang, J. A. Lauber, G. Muller, R. R. Kofler, X. Liu, S. S. Hertzbach, Henry W. Kendall, Nicola Bacchetta, Thomas W. Markiewicz, S. Willocq, R. Dubois, Y. Ohnishi, W. J. Wisniewski, F. E. Taylor, and J. R. Bogart
Subjects: Quark, Physics, Particle decay, Particle physics, Electron–positron annihilation, media_common.quotation_subject, Hadron, General Physics and Astronomy, Parity (physics), Electron, Asymmetry, media_common, Lepton
Abstract: The parity-violating parameters ${A}_{b}$ and ${A}_{c}$ are directly measured by the SLD experiment at the SLAC Linear Collider in ${e}^{+}{e}^{\ensuremath{-}}$ collisions with polarized electrons at the ${Z}^{0}$ resonance. Leptons with distinctive total and transverse momenta are used to select and analyze ${Z}^{0}\ensuremath{\rightarrow}b\overline{b}$ and ${Z}^{0}\ensuremath{\rightarrow}c\overline{c}$ events. ${A}_{b}$ and ${A}_{c}$ are extracted by forming the left-right forward-backward asymmetry in electron beam polarization and quark polar angle. From our 1993 sample of 1.8 p${\mathrm{b}}^{--1}$ of ${Z}^{0}$ decay data with an average electron beam polarization of 63% we find ${A}_{b}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.91\ifmmode\pm\else\textpm\fi{}0.14$ (stat) $\ifmmode\pm\else\textpm\fi{}0.07$ (syst) and ${A}_{c}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.37\ifmmode\pm\else\textpm\fi{}0.23$ (stat) $\ifmmode\pm\else\textpm\fi{}0.21$ (syst).
Published: 1995

31. Search for Jet Handedness in HadronicZ0Decays

Author: Stephen Watts, C. Baltay, H. Masuda, C. Vannini, P. De Simone, Michael H. Shaevitz, J. M. Yamartino, M. Loreti, J. Quigley, T. Takahashi, Stephen Robert Wagner, Wit Busza, R.D. Elia, G. E. Gladding, R. Prepost, M.B. Barakat, Y. Hasegawa, M. Carpinelli, J. Wyss, J.P. Venuti, Piero Giorgio Verdini, P. C. Rowson, P.F. Jacques, R. E. Cassell, P.E. Rensing, O. H. Saxton, H. R. Band, Amitabh Lath, G. Muller, R. R. Kofler, C.J.S. Damerell, W. W. Ash, H. Yuta, P. M. Mockett, J. Huber, C. Zeitlin, R. Steiner, C. Y. Prescott, Giancarlo Mantovani, T. H. Burnett, H. Hwang, S. Gonzalez, M. Cavalli-Sforza, C. J. Ahn, M. Nussbaum, T. Gillman, R. Cowan, M. Dima, R. S. Panvini, C. Simopoulos, I. M. Peruzzi, E. Mazzucato, D. Su, M. Woods, K. Furuno, Fred Wickens, C. Fan, M. Piccolo, G. Baranko, L. Pescara, J. D. Turk, T.J. Pavel, H. Steiner, S. Dasu, B. Camanzi, A. Lu, V. V. Serbo, J. E. Brau, A. Calcaterra, M. E. Huffer, S. L. White, T. Schalk, I. Karliner, Dominik Müller, R. Frey, E. Torrence, S. Willocq, L. S. Rochester, D. J. Sherden, B. Mours, B. I. Eisenstein, J. A. Lauber, E. W. Hughes, T. Bienz, R. K. Yamamoto, D. Falciai, R. King, D. W. G. S. Leith, A.B. d'Oliveira, T. Bolton, M. Kalelkar, D. G. Coyne, J. R. Johnson, S. H. Williams, A. Szumilo, J. J. Russell, S. Manly, B. A. Schumm, S. Hedges, S. L. Shapiro, G. B. Word, J. S. Whitaker, R. A. Johnson, K.C. Moffeit, G. Shapiro, R. W. Zdarko, M.E. King, C. C. Young, G. Mancinelli, P.Y.C. Du, J. Ma, E. L. Hart, J. A. Snyder, H. A. Neal, Rafe Schindler, X. Yang, P. Stamer, M. J. Fero, R. Kroeger, Shinzo Suzuki, M. Langston, S. R. Smith, W. J. Wisniewski, O. Bardon, Gian Mario Bilei, T. W. Reeves, Koji Abe, Robert Wilson, D. C. Williams, Roberto Dell'Orso, M. Swartz, M. D. Hildreth, David O. Caldwell, A. P. Waite, X. Liu, S. S. Hertzbach, J. A. Coller, J. Va'vra, A. S. Johnson, A. Seiden, Rino Castaldi, U. Nauenberg, K.G. Baird, Henry W. Kendall, David A. Williams, F. E. Taylor, S. J. Yellin, H. O. Cohn, A. K. McKemey, S. Sen, K. T. Pitts, R. Massetti, R. Cotton, R. Messner, Timothy Barklow, N.M. Krishna, E. Vella, G. Blaylock, G. D. Punkar, Martin Breidenbach, J. R. Bogart, V. Cook, R. Kajikawa, R. de Sangro, L. S. Osborne, H. L. Lynch, J. Rothberg, G. Hallewell, U. Schneekloth, I. Abt, P. N. Burrows, M. G. Strauss, T. Akagi, N. B. Sinev, G. H. Zapalac, Alberto Benvenuti, G. R. Bower, F. Suekane, Brian Meadows, James Shank, Dario Bisello, Andrea Castro, L. Piemontese, H. Kawahara, A. W. Weidemann, E. Church, T. Nagamine, T. Junk, T. Maruyama, Y. Iwasaki, T. L. Usher, Enrico Pieroni, Y. Kim, R.J. Plano, H. Park, J. F. Labs, A. O. Bazarko, R. Ben-David, A. Sugiyama, D. Aston, Nicola Bacchetta, J. Zhou, Thomas W. Markiewicz, J. A. Jaros, R. Dubois, D. Calloway, Y. Ohnishi, B. N. Ratcliff, D. L. Burke, and W. M. Bugg
Subjects: Quark, Physics, Particle physics, Computer Science::Information Retrieval, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Hadron, General Physics and Astronomy, Elementary particle, Fermion, Polarization (waves), Asymmetry, Nuclear physics, Particle decay, High Energy Physics::Experiment, Boson, media_common
Abstract: We have searched for signatures of polarization in hadronic jets from [ital Z][sup 0][r arrow][ital q[bar q]] decays using the jet handedness'' method. The polar angle asymmetry induced by the high SLAC Linear Collider electron-beam polarization was used to separate quark jets from antiquark jets, expected to be left and right polarized, respectively. We find no evidence for jet handedness in our global sample or in a sample of light quark jets, and we set upper limits at the 95% C.L. of 0.063 and 0.099, respectively, on the magnitude of the analyzing power of the method proposed by Efremov [ital et] [ital al].
Published: 1995

32. Measurement ofαsfrom energy-energy correlations at theZ0resonance

Author: G. Baranko, S. L. White, E. Church, T. Junk, S. Hedges, R. S. Panvini, A. W. Weidemann, R. J. Belcinski, W. J. Wisniewski, R.J. Plano, L.S. Rochester, Y. Iwasaki, T. L. Usher, H. Park, S. J. Yellin, N.M. Krishna, R. Prepost, P.F. Jacques, M. Kowitt, Piero Giorgio Verdini, M. Pauluzzi, J. D. Richman, Giancarlo Mantovani, J. Va’vra, H. Hwang, D. G. Hitlin, D. J. Sherden, T. Nagamine, Nicola Bacchetta, D. O. Caldwell, R. S. Kofler, D. W. G. S. Leith, Koya Abe, G. Eigen, A. D'Oliverira, P. Coyle, E. Torrance, Roberto Battiston, C. Baltay, A. S. Johnson, H. Masuda, P. C. Rowson, Philip Burrows, H. Yuta, J. M. Yamartino, W. A. Majid, Stephen Watts, J. A. Coller, Shiro Suzuki, T. Hansl-Kozanecka, M. Nussbaum, G. Mueller, J. Carr, S. Smith, Wit Busza, K. T. Pitts, Melody A. Swartz, P. Saez, R. Steiner, G. Blaylock, S. Gonzalez, J.P. Venuti, B. Camanzi, Hyun-Chul Kim, J. A. Snyder, D. J. Mellor, G. Mancinelli, P. M. Mockett, M. Langston, A. Lu, M. H. Kelsey, I. Stockdale, O. Bardon, Maurizio Biasini, D. L. Burke, C.J.S. Damerell, R. J. Wilson, Michael S. Witherell, S. Kaiser, Michael J. Fero, J. Ma, G. Agnew, B. Meadows, R. Cotton, X. Liu, W. M. Bugg, S. S. Hertzbach, V. Cook, R. de Sangro, Joseph Izen, K. Furuno, M. Carpinelli, G. H. Zapalac, Yukio Hasegawa, K.C. Moffeit, U. Schneekloth, I. Karliner, M. G. Strauss, Dominik Müller, L. Servoli, T. Maruyama, J.I. Friedman, A. Seiden, M. Cavalli-Sforza, G. Hallewell, Henry W. Kendall, G. B. Word, Elliot Hughes, F. Suekane, S. L. Shapiro, J. Wyss, C. C. Young, U. Nauenberg, G. M. Bilei, G. R. Bower, L. Chen, D. G. Coyne, T. H. Burnett, James Shank, Amitabh Lath, A. Gillman, J. J. Thaler, R. Claus, R. K. Yamamoto, B. I. Eisenstein, C. Zeitlin, M. H. Shaevitz, Andrea Castro, A. K. Honma, R.D. Elia, M. D. Hildreth, G. E. Gladding, O. H. Saxton, T. Bolton, R. H. Schindler, Sridhara Dasu, Roberto Dell'Orso, H. R. Band, A. Szumilo, L. Piemontese, Gilbert Shapiro, Thomas W. Markiewicz, J. Rothberg, I. Abt, Alberto Benvenuti, M. Kalelkar, R. Verdier, W. W. Ash, Enrico Pieroni, E. L. Hart, H. Kawahara, Fred Wickens, R. Kroeger, J. E. Brau, P. Zucchelli, Dario Bisello, J. F. Labs, S. Willocq, A. Calcaterra, A. O. Bazarko, T. Schalk, J. F. McGowan, T. W. Reeves, H. L. Lynch, H. M. Steiner, C. Vannini, S. H. Williams, N. Toge, D.C. Schultz, T. Bienz, A. Sugiyama, P. De Simone, M.D. Sokoloff, R. King, J. J. Russell, Y. C. Du, J. A. Lauber, W. Dunwoodie, L.S. Osborne, M. Loreti, J. A. Jaros, John Scott Whitaker, J. Quigley, D. Aston, R. A. Johnson, A. Santocchia, T. Takahashi, L. Rosenson, F. E. Taylor, D. Calloway, Stephen Robert Wagner, B. N. Ratcliff, C. Simopoulos, M.E. Huffer, J. R. Bogart, P. E. Stamer, C. Fan, T.J. Pavel, R. Frey, S. De Simone, F. Perrier, G. B. Chadwick, J. R. Johnson, R. Kajikawa, P. D. Acton, P. C. Kim, I. M. Peruzzi, R. E. Cassell, P.E. Rensing, R. Cowan, A. Bean, Yeong-Dae Kwon, A. P. Waite, K.G. Baird, B. Mours, David A. Williams, A. K. McKemey, B. A. Schumm, J. D. Turk, S. Manly, H. A. Neal, Richard Dubois, Michele Gallinaro, R. W. Zdarko, M.E. King, R. Messner, E. Vella, J. Huber, M. Petradza, M. Turcotte, R. Ben-David, J. Zhou, M. Woods, Rino Castaldi, H. O. Cohn, G. D. Punkar, M. Tecchio, R. J. Morrison, L. Pescara, D. C. Williams, Martin Breidenbach, C. Y. Prescott, D. Su, E. Mazzuícato, M. Piccolo, and K. Hasegawa
Subjects: Coupling constant, Physics, Quantum chromodynamics, Statistics::Theory, Particle physics, Statistics::Applications, 010308 nuclear & particles physics, Computer Science::Information Retrieval, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Coupling (probability), 01 natural sciences, Standard Model, Nuclear physics, Particle decay, 0103 physical sciences, Order (group theory), High Energy Physics::Experiment, Perturbation theory, 010306 general physics, Energy (signal processing), Boson
Abstract: We determine the strong coupling ${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}$ from a comprehensive study of energy-energy correlations (EEC's) and their asymmetry (AEEC's) in hadronic decays of ${\mathit{Z}}^{0}$ bosons collected by the SLD experiment at SLAC. The data are compared with all four available predictions of QCD calculated up to O(${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}^{2}$) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between ${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}$ values extracted from the different O(${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}^{2}$) calculations. We also find a large renormalization scale ambiguity in ${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}$ determined from the EEC's using the O(${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}^{2}$) calculations; this ambiguity is reduced in the case of the AEEC's and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain ${\mathrm{\ensuremath{\alpha}}}_{\mathit{s}}$(${\mathit{M}}_{\mathit{Z}}^{2}$)=0.${124}_{\mathrm{\ensuremath{-}}0.004}^{+0.003}$ (expt.) \ifmmode\pm\else\textpm\fi{}0.009 (theory).
Published: 1994

33. Precise Measurement of the Left-Right Cross Section Asymmetry inZBoson Production bye+e−Collisions

Author: R. E. Cassell, P.E. Rensing, T. H. Burnett, C. C. Young, R. Cowan, M. Nussbaum, R. Kajikawa, S. J. Yellin, G. H. Zapalac, S. Sen, L. S. Osborne, Y. Hasegawa, J.P. Venuti, Roberto Dell'Orso, N.M. Krishna, J. Va'vra, C.J.S. Damerell, G. M. Bilei, G. R. Bower, R. Ben-David, James Shank, Andrea Castro, J. Ma, H. L. Lynch, S. Hedges, J. Rothberg, I. Abt, J. Zhou, G. B. Word, R. King, A. P. Waite, J. Duboscq, M. Swartz, A. S. Johnson, C. Y. Prescott, O. Bardon, C. Baltay, M. Carpinelli, H. Masuda, C. Fan, T.J. Pavel, P. C. Rowson, H. Yuta, U. Nauenberg, B. A. Schumm, R. Frey, S. De Simone, T. Maruyama, R. Steiner, D. Su, T. Schalk, Wit Busza, S. Gonzalez, T. Gillman, F. J. Decker, J. Huber, J. R. Johnson, B. Camanzi, Shinzo Suzuki, M. Piccolo, M. Langston, O. H. Saxton, G. Mancinelli, H. R. Band, David O. Caldwell, E. Torrence, H. A. Neal, P. N. Burrows, R. Prepost, J. Wyss, Dario Bisello, T. Nagamine, T. Bienz, R. K. Yamamoto, R. Cotton, P.F. Jacques, L. Pescara, X. Liu, D.C. Schultz, P. Emma, S. S. Hertzbach, J. Quigley, J. D. Turk, J. J. Russell, Y. C. Du, T. Takahashi, K. Furuno, A. Sugiyama, R. S. Panvini, Fred Wickens, C. Zeitlin, A. Seiden, D. Aston, Stephen Robert Wagner, Y. Iwasaki, T. L. Usher, Henry W. Kendall, J. S. Whitaker, D. Calloway, T. Limberg, R. A. Johnson, R. Messner, D. G. Coyne, R. Castaldi, H. Park, E. Church, J. A. Lauber, T. Junk, Alberto Benvenuti, U. Schneekloth, B. Mours, L. S. Rochester, H. Kawahara, E. Vella, J. E. Brau, A. Calcaterra, M. D. Hildreth, D. C. Williams, G. Muller, H. M. Steiner, F. Suekane, Brian Meadows, R. R. Kofler, D. J. Sherden, Stephen Watts, D. W. G. S. Leith, I. M. Peruzzi, E. W. Hughes, S. H. Williams, E. L. Garwin, Martin Breidenbach, S. Dasu, M. Kalelkar, Rafe Schindler, M.B. Barakat, W. J. Wisniewski, Robert Wilson, R.D. Elia, G. E. Gladding, J. A. Coller, K. T. Pitts, V. Cook, R. de Sangro, H. O. Cohn, G. Hallewell, J. R. Bogart, G. D. Punkar, R.J. Plano, S. Manly, J. M. Yamartino, M. Woods, R. W. Zdarko, M.E. King, J. A. Snyder, R. Dubois, P. Stamer, J. F. McGowan, A. Lath, Yeong-Dae Kwon, T. Barklow, M. H. Kelsey, K.G. Baird, David A. Williams, A. K. McKemey, G. Blaylock, S. Willocq, W. W. Ash, Michael Sokoloff, Joseph Izen, T. Bolton, Gilbert Shapiro, E. L. Hart, S. R. Smith, T. W. Reeves, Koji Abe, Nicola Bacchetta, Thomas W. Markiewicz, Piero Giorgio Verdini, Giancarlo Mantovani, G. Baranko, H. Hwang, D. G. Hitlin, E. Mazzucato, S. L. White, A.B. d'Oliveira, C. Simopoulos, F. E. Taylor, A. Lu, M. G. Strauss, L. Piemontese, Enrico Pieroni, J. F. Labs, M. E. Huffer, A. O. Bazarko, M. Cavalli-Sforza, B. N. Ratcliff, D. L. Burke, W. M. Bugg, P. De Simone, Michael H. Shaevitz, M. Loreti, K.C. Moffeit, R. S. Kroeger, A. W. Weidemann, J. A. Jaros, P. M. Mockett, I. Karliner, Dominik Müller, B. I. Eisenstein, A. Szumilo, M. J. Fero, and C. Vannini
Subjects: Physics, Particle physics, Cabibbo–Kobayashi–Maskawa matrix, media_common.quotation_subject, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Weinberg angle, Asymmetry, Nuclear physics, Particle decay, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, media_common, Boson
Abstract: We present a precise measurement of the left-right cross section asymmetry ([ital A][sub [ital L][ital R]]) for [ital Z] boson production by [ital e][sup +][ital e][sup [minus]] collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0[plus minus]1.1)%. Using a sample of 49 392 [ital Z] decays, we measure [ital A][sub [ital L][ital R]] to be 0.1628[plus minus]0.0071(stat)[plus minus]0.0028(syst) which determines the effective weak mixing angle to be sin[sup 2][theta][sub [ital W]][sup eff]=0.2292[plus minus]0.0009(stat) [plus minus]0.0004(syst).
Published: 1994

34. Search for a New Gauge Boson in Electron-Nucleus Fixed-Target Scattering by the APEX Experiment

Author: D. Walz, E. Piasetzky, M. M. Dalton, A.C. Odian, C. Field, J. McDonald, Eric L. N. Jensen, R. Michaels, Bogdan Wojtsekhowski, J. Bono, Ishay Pomerantz, L. Selvy, J. O. Hansen, K. Bartlett, M. Oriunno, Philip Schuster, T. Holmstrom, T. Averett, R. Partridge, Vladimir Nelyubin, C. W. de Jager, R. Essig, R. Subedi, J. A. Jaros, Yujie Qiang, Neil Goeckner-Wald, Natalia Toro, S. Riordan, Y. Roblin, A. Barbieri, A. Kelleher, Pete Markowitz, Z. Ahmed, M. Khandaker, V. Maxwell, A. Camsonne, J. LeRose, D. Anez, J. Segal, T. Maruyama, James Boyce, E. Long, J. Huang, M. Paolone, S. Mayilyan, Jie Zhang, James Baker Beacham, E. Folts, Kalyan Allada, M. T. Graham, Douglas Higinbotham, B. Sawatzky, K.C. Moffeit, R. A. Lindgren, S. Abrahamyan, J. Donaghy, Ashot Gasparian, Vincent Sulkosky, S. Stepanyan, Nilanga Liyanage, J. Gomez, P. Brindza, Kyle Cranmer, Juliette Mammei, A. Shahinyan, and S. Iqbal
Subjects: Coupling, Physics, Particle physics, Range (particle radiation), Gauge boson, 010308 nuclear & particles physics, Scattering, General Physics and Astronomy, Electron, 01 natural sciences, Resonance (particle physics), Dark photon, Nuclear physics, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Boson
Abstract: We present a search at the Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling α' to electrons. Such a particle A' can be produced in electron-nucleus fixed-target scattering and then decay to an e + e- pair, producing a narrow resonance in the QED trident spectrum. Using APEX test run data, we searched in the mass range 175-250 MeV, found no evidence for an A'→ e+ e- reaction, and set an upper limit of α'/α ~/= 10(-6). Our findings demonstrate that fixed-target searches can explore a new, wide, and important range of masses and couplings for sub-GeV forces.
Published: 2011

35. Inclusive charged hadron and K0 production in two-photon interactions

Author: J. Boyer, Darien Wood, G. J. Feldman, K. Hayes, D. Herrup, J. A. Jaros, G. H. Trilling, G. S. Abrams, D. Karlen, P. C. Rowson, D. Cords, F. Butler, L. Gladney, N. S. Lockyer, G. Gidal, I. Juricic, M. S. Gold, J. Haggerty, A. M. Boyarski, M. L. Perl, R. A. Ong, K. Riles, Andrew Lankford, R. J. Hollebeek, D. Amidei, B. W. Leclaire, Michael Levi, V. Lüth, Mark E. Nelson, Gordon H. Hanson, J. A. Kadyk, J. M. Yelton, D. L. Burke, W. B. Schmidke, J. M. Dorfan, T. Schaad, H. Schellman, W. R. Innes, Patricia R. Burchat, G. Goldhaber, R. R. Larsen, A. Baden, and T. Barklow
Subjects: Quark, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pair production, Annihilation, Meson, Hadron, Elementary particle, Production (computer science), Fermion
Abstract: The analogous process to quark pair production in e{sup +} e{sup {minus}} annihilation is the hard-scattering quark exchange process in {gamma}{gamma} interactions. This hard-scattering process is expected to dominate the cross section at high transverse momenta of the produced quarks. Experimentally, one has looked for this process in two-jet as well as inclusive particle production and has found a relatively low PT onset of hard scattering in {gamma}{gamma} interactions. This report examines the issue in more detail (high statistics) for charged particle inclusive production and checks if the heavier flavors display a similar behavior in inclusive K{sup 0} production.
Published: 1993

36. Measurement of the charged multiplicity of events containing bottom hadrons atEc.m.=91GeV

Author: B. A. Schumm, D. S. Koetke, C. E. Adolphsen, J. P. Alexander, D. Averill, B. C. Barish, T. Barklow, B. A. Barnett, D. Blockus, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, J. M. Dorfan, P. S. Drell, D. C. Drewer, D. Durrett, R. Elia, G. J. Feldman, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Hanson, R. Harr, B. Harral, F. A. Harris, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, C. Kenney, M. King, S. Komamiya, L. A. Kowalski, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O'Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, M. Turala, R. Van Kooten, P. Weber, A. J. Weinstein, E. Wicklund, S. R. Wagner, M. Woods, M. Yurko, and C. Zaccardelli
Subjects: Nuclear physics, Physics, Quark, Particle decay, Particle physics, Electron–positron annihilation, Hadron, Quark model, High Energy Physics::Experiment, Elementary particle, Multiplicity (mathematics), Nuclear Experiment, Charged particle
Abstract: Using an impact-parameter tag to select an enriched sample of Z0bb» events, we have measured the difference between the average charged multiplicity of bb» and all hadronic Z0 decays to be 2.11.8(stat) 0.6(syst) tracks per event. The resulting total (nonleading) charged multiplicity for Z0 bb» events is 23.1(12.0)1.8 0.6 tracks. A comparison of this nonleading multiplicity to hadronic multiplicity data in the range of 10 to 60 GeV supports the hypothesis of flavor-independent hadronic fragmentation, and yields a measurement of the average energy fraction of bottom hadrons in Z0 decays of xEb=0.620.100.04. © 1992 The American Physical Society.
Published: 1992

37. Search for the production of the final statesτ+τ−e+e−,τ+τ−μ+μ−, andτ+τ−π+π−ine+e−collisions at √s=29 GeV

Author: R. R. Larsen, Michael Levi, V. Lüth, S. R. Wagner, B. W. Leclaire, Darien Wood, A. M. Boyarski, J. A. Kadyk, P. D. Sheldon, G. H. Trilling, M. S. Gold, D. P. Stoker, K. Riles, N. S. Lockyer, Gordon H. Hanson, G. Gidal, G. J. Feldman, I. Juricic, G. Goldhaber, Patricia R. Burchat, J. M. Yelton, A. Snyder, D. Karlen, M. L. Perl, L. Golding, K. Hayes, W. R. Innes, Mark E. Nelson, A. Baden, D. Herrup, T. Barklow, R. A. Ong, L. Gladney, P. C. Rowson, H. Schellman, D. Amidei, G. S. Abrams, J. Haggerty, R. J. Hollebeek, F. Butler, M. Petradza, Burton Richter, Andrew Lankford, D. L. Burke, W. B. Schmidke, J. M. Dorfan, J. Boyer, T. Schaad, and J. A. Jaros
Subjects: Physics, Particle physics, Muon, Pion, Meson, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Standard Model, Lepton
Abstract: We have searched for the reaction e+e-, where f is either an electron, muon, or charged pion, at s =29 GeV using the Mark II detector at the SLAC PEP storage ring. One candidate event is found while 2.3 events are expected from known processes. We would expect to see 11 events if the cross section for e+e- at s=29 GeV were enhanced by the factor of 4.7 which the ALEPH Collaboration reports for s=91 GeV. We also look for e+e- and e+e-, and for e+e-, using a similar analysis procedure, and see the number of events predicted by the standard model. © 1992 The American Physical Society.
Published: 1992

38. Measurement of thebb¯fraction in hadronicZ0decays with precision vertex detectors

Author: R. G. Jacobsen, D. S. Koetke, C. E. Adolphsen, D. Fujino, B. A. Schumm, S. R. Wagner, J. P. Alexander, D. Averill, B. C. Barish, T. Barklow, B. A. Barnett, D. Blockus, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, J. M. Dorfan, P. S. Drell, D. C. Drewer, D. Durrett, R. Elia, G. J. Feldman, R. C. Field, W. T. Ford, C. Fordham, R. Frey, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Hanson, R. Harr, B. Harral, F. A. Harris, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, J. A. Jaros, C. K. Jung, J. A. Kadyk, C. Kenney, M. King, S. Komamiya, L. A. Kowalski, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, D. R. Rust, H. F. W. Sadrozinski, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, M. Turala, R. Van Kooten, P. Weber, A. J. Weinstein, E. Wicklund, M. Woods, M. Yurko, and C. Zaccardelli
Subjects: Nuclear physics, Physics, Particle physics, Particle decay, Annihilation, Distribution function, Hadron, General Physics and Astronomy, Elementary particle, Particle identification, Bar (unit), Boson
Abstract: We have measured the fraction of {ital b{bar b}} events in hadronic {ital Z}{sup 0} decays, {ital R}{sub {ital b}{ital {bar b}}}, using the vertex detector system of the Mark II detector at the SLAC Linear Collider. We tag {ital b{bar b}} events by requiring the coincidence of three or more tracks with significant impact parameters. This tag is 50% efficient and results in a sample of 85% purity. We find {ital R}{sub {ital b}{ital {bar b}}}=0.251{plus minus}0.049{plus minus}0.030, in good agreement with other measurements and the standard model prediction.
Published: 1991

39. Search for elastic nondiagonal lepton-pair production ine+e−annihilation at √s=29 GeV

Author: J. J. Gomez-Cadenas, C. A. Heusch, G. Abrams, C. E. Adolphsen, C. Akerlof, J. P. Alexander, M. Alvarez, D. Amidei, A. R. Baden, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, D. Blockus, G. Bonvicini, A. Boyarski, J. Boyer, B. Brabson, A. Breakstone, J. M. Brom, F. Bulos, P. R. Burchat, D. L. Burke, F. Butler, F. Calvino, R. J. Cence, J. Chapman, D. Cords, D. P. Coupal, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, P. S. Drell, G. J. Feldman, E. Fernandez, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, G. Gidal, L. Gladney, T. Glanzman, M. S. Gold, G. Goldhaber, L. Golding, A. Green, P. Grosse-Wiesmann, J. Haggerty, G. Hanson, R. Harr, F. A. Harris, C. M. Hawkes, K. Hayes, D. Herrup, T. Himel, M. Hoenk, R. J. Hollebeek, D. Hutchinson, J. Hylen, W. R. Innes, M. Jaffre, J. A. Jaros, I. Juricic, J. A. Kadyk, D. Karlen, J. Kent, S. R. Klein, A. Koide, W. Koska, W. Kozanecki, A. J. Lankford, R. R. Larsen, B. W. LeClaire, M. E. Levi, Z. Li, A. M. Litke, N. S. Lockyer, V. Lüth, C. Matteuzzi, J. A. J. Matthews, D. I. Meyer, B. D. Milliken, K. C. Moffeit, L. Müller, J. Nash, M. E. Nelson, D. Nitz, H. Ogren, R. A. Ong, K. F. O’Shaughnessy, S. I. Parker, C. Peck, A. Petersen, M. Petradza, F. C. Porter, P. Rankin, B. Richter, K. Riles, P. C. Rowson, D. R. Rust, H. F. W. Sadrozinski, T. Schaad, T. L. Schalk, H. Schellman, W. B. Schmidke, A. S. Schwarz, A. Seiden, P. D. Sheldon, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, R. Thun, G. H. Trilling, R. Tschirhart, C. de la Vaissiere, R. Van Kooten, H. Veltman, P. Voruganti, S. R. Wagner, P. Weber, A. J. Weinstein, A. J. Weir, S. Weisz, S. L. White, E. Wicklund, D. R. Wood, D. Y. Wu, and J. M. Yelton
Subjects: Physics, Particle physics, Annihilation, Electron–positron annihilation, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Fermion, Nuclear physics, Pair production, High Energy Physics::Experiment, Production (computer science), Storage ring, Lepton
Abstract: We have searched for the annihilation of e+e- into the exclusive channels e and at s =29 GeV, using 226 and 133 pb-1, respectively, of data taken with the Mark II detector at the SLAC storage ring PEP. The resulting candidate sample is compatible with the expected background from pair production. Our analysis yields 95%-C.L. cross-section limits of e/
Published: 1991

40. Measurement of the total hadronic cross section ine+e−annihilation ats=29GeV

Author: C. von Zanthier, W. de Boer, G. Grindhammer, J. Hylen, B. Harral, C. Hearty, L. Labarga, J. Matthews, M. Schaad, G. Abrams, C. E. Adolphsen, C. Akerlof, J. P. Alexander, M. Alvarez, A. R. Baden, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, D. Blockus, G. Bonvicini, A. Boyarski, J. Boyer, B. Brabson, A. Breakstone, J. M. Brom, F. Bulos, P. R. Burchat, D. L. Burke, F. Butler, F. Calvino, R. J. Cence, J. Chapman, D. Cords, D. P. Coupal, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, P. S. Drell, G. J. Feldman, E. Fernandez, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, G. Gidal, T. Glanzman, G. Goldhaber, A. Green, P. Grosse-Wiesmann, J. Haggerty, G. Hanson, R. Harr, F. A. Harris, C. M. Hawkes, K. Hayes, D. Herrup, C. A. Heusch, T. Himel, M. Hoenk, D. Hutchinson, W. R. Innes, M. Jaffre, J. A. Jaros, I. Juricic, J. A. Kadyk, D. Karlen, J. Kent, S. R. Klein, W. Koska, W. Kozanecki, A. J. Lankford, R. R. Larsen, M. E. Levi, Z. Li, A. M. Litke, V. Lüth, D. I. Meyer, B. D. Milliken, K. C. Moffeit, L. Müller, J. Nash, M. E. Nelson, D. Nitz, H. Ogren, K. F. O'Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, A. Petersen, M. Petradza, F. C. Porter, P. Rankin, K. Riles, D. R. Rust, H. F. W. Sadrozinski, T. L. Schalk, W. B. Schmidke, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, R. Thun, G. H. Trilling, R. Tschirhart, R. Van Kooten, H. Veltman, P. Voruganti, S. R. Wagner, P. Weber, A. J. Weinstein, A. J. Weir, S. Weisz, S. L. White, E. Wicklund, D. R. Wood, and D. Y. Wu
Subjects: Physics, Elastic scattering, Cross section (physics), Particle physics, Luminosity (scattering theory), Pair production, Annihilation, Monte Carlo method, Radiative transfer, High Energy Physics::Experiment, Bhabha scattering
Abstract: A precise measurement of the ratio R of the total cross section e+e-hadrons to the pointlike cross section e+e-+- at a center-of-mass energy of 29.0 GeV is presented. The data were taken with the upgraded Mark II detector at the SLAC storage ring PEP. The result is R=3.920.050.09. The luminosity has been determined with three independent luminosity monitors measuring Bhabha scattering at different angular intervals. Recent calculations of higher-order QED radiative corrections are used to estimate the systematic error due to missing higher-order radiative corrections in the Monte Carlo event generators. © 1991 The American Physical Society.
Published: 1991

41. Results on two-photon interactions from Mark II at spear

Author: G. Goldhaber, J. F. Patrick, V. I. Telnov, R. E. Millikan, J. Dorfan, A. M. Boyarski, J. A. Jaros, R. H. Schindler, J. A. Kadyk, W. E. Dieterle, Martin Breidenbach, R. A. Vidal, A. D. Johnson, S. Cooper, A. J. Lankford, D. G. Hitlin, D. L. Scharre, R. R. Larsen, D. L. Burke, R. F. Schwitters, M. W. Eaton, James Strait, G. H. Trilling, Kenneth G. Hayes, A. Roussarie, M. S. Alam, Burton Richter, V. Ldth, H. Taureg, J. L. Siegrist, T. Himel, George Gidal, M. E. B. Franklin, M. W. Coles, P. Jenni, E. Vella, J. M. Weiss, M. L. Perl, C. Y. Pang, R. J. Hollebeek, I. Videau, H. Zaccone, William Chinowsky, M. Tonutti, W. R. Innes, W. Carithers, J. B. Dillon, G. S. Abrams, J. Dorenbosch, G. J. Feldman, G. G. Hanson, C. A. Blocker, and Mark E. Nelson
Subjects: Physics, Nuclear physics, Particle decay, Range (particle radiation), Meson, Hadron, Radiative transfer, Elementary particle, Magnetic detector, Atomic physics, Boson
Abstract: Two-photon interactions have been studied with the SLAC-LBL Mark II magnetic detector at SPEAR. The cross-section for η′ production by the reaction e+e− → e+e−η′ has been measured over the beam energy range from 2 to 4 GeV. The radiative width Tγγ(η′) has been determined to be 5.8 ± 1.1 keV (±20% systematic uncertainty). Upper limits on the radiative widths of the f(1270), A2(1310), and f′(1515) mesons have been determined. The two-prong final state events show a signal for the f(1270) decaying into η+π− . The current status of this analysis has been discussed.
Published: 2008

42. Test of QED to fourth order by study of four-lepton final states ine+e−interactions at 29 GeV with the Mark II detector

Author: M. Petradza, R. Thun, G. Abrams, D. Amidei, A. R. Baden, T. Barklow, A. Boyarski, J. Boyer, P. R. Burchat, D. L. Burke, F. Butler, J. M. Dorfan, G. J. Feldman, G. Gidal, L. Gladney, M. S. Gold, G. Goldhaber, J. Haggerty, G. Hanson, K. Hayes, D. Herrup, T. Himel, R. J. Hollebeek, W. R. Innes, J. A. Jaros, J. A. Kadyk, D. Karlen, S. R. Klein, A. J. Lankford, R. R. Larsen, B. W. LeClaire, M. E. Levi, N. S. Lockyer, V. Lüth, M. E. Nelson, R. A. Ong, M. L. Perl, B. Richter, K. Riles, P. C. Rowson, T. Schaad, H. Schellman, W. B. Schmidke, P. D. Sheldon, G. H. Trilling, D. R. Wood, and J. M. Yelton
Subjects: Coupling constant, Physics, Particle physics, Fourth order, Annihilation, Muon, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Elementary particle, Fermion, Lepton
Abstract: We have tested QED to fourth order in the coupling constant {alpha} in the large-{ital Q}{sup 2} region by studying four-lepton final states in {ital e}{sup +}{ital e}{sup {minus}} interactions with the Mark II detector at the SLAC storage ring PEP ({radical}{ital s} =29 GeV). All four final-state particles were detected at large angles with respect to the beam axis. For an integrated luminosity of 205 pb{sup {minus}1}, we observed ten {ital e}{sup +}{ital e}{sup {minus}}{ital e+}{ital e}{sup {minus}}, ten {ital e}{sup +}{ital e}{sup {minus}}{mu}{sup +}{mu}{sup {minus}}, and one {mu}{sup +}{mu}{sup {minus}}{mu}{sup +}{mu}{sup {minus}} events with opposite-charge pair masses greater than 1 GeV/{ital c}{sup 2}. These events show good agreement with the complete {alpha}{sup 4} QED calculation.
Published: 1990

43. Search for a nearly degenerate lepton doublet (L−,L0)

Author: W. B. Schmidke, D. Karlen, J. Dorfan, G. Hanson, A. J. Lankford, A. M. Boyarski, Michael Levi, J. A. Kadyk, H. Schellman, Patricia R. Burchat, J. A. Jaros, N. S. Lockyer, Timothy Barklow, I. Juricic, Mark E. Nelson, L. Golding, R. A. Ong, S. R. Klein, Burton Richter, J. Boyer, R. J. Hollebeek, G. J. Feldman, P. C. Rowson, B. W. Leclaire, G. S. Abrams, D. Herrup, D. L. Burke, R. R. Larsen, P. D. Sheldon, L. Gladney, T. Schaad, Gerson Goldhaber, J. M. Yelton, D. Amidei, A. R. Baden, F. Butler, K. Riles, V. Luth, George Gidal, M. L. Perl, Walter R. Innes, Kenneth G. Hayes, Darien Wood, G. H. Trilling, J. Haggerty, and M. S. Gold
Subjects: Physics, Particle physics, Annihilation, Branching fraction, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, Order (ring theory), Elementary particle, Nuclear physics, Massless particle, High Energy Physics::Experiment, Neutrino, Energy (signal processing), Lepton
Abstract: We have searched for a heavy charged lepton with an associated neutrino of nearly the same mass in {ital e}{sup +}{ital e}{sup {minus}} annihilation data taken with the Mark II detector at a center-of-mass energy of 29 GeV. In order to suppress contamination from conventional two-photon reactions, this analysis uses a novel, radiative-tagging technique. Requiring the presence of an isolated, energetic photon allows a search for lepton doublets with mass splittings smaller than that previously accessible to experiment. No evidence for such a new lepton doublet has been found, enabling limits to be placed on allowed mass combinations. Mass splittings as low as 250--400 MeV/{ital c}{sup 2} are excluded for charged-lepton masses between 500 MeV/{ital c}{sup 2} and 10 GeV/{ital c}{sup 2}.
Published: 1990

44. Searches for supersymmetric particles produced inZ-boson decay

Author: T. Barklow, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Annihilation, Electron–positron annihilation, Degenerate energy levels, General Physics and Astronomy, Elementary particle, Supersymmetry, Linear particle accelerator, law.invention, Nuclear physics, law, Collider, Boson
Abstract: We have searched for supersymmetric particles in 528 Z decays with the Mark II detector at the SLAC Linear Collider. We place 95%-confidence-level lower mass limits on degenerate squarks, nondegenerate up-type squarks, nondegenerate down-type squarks, charginos, pair-produced unstable neutralinos, and neutralinos from associated production. © 1990 The American Physical Society.
Published: 1990

45. A reanalysis of B0-B̄0 mixing in e+e− annihilation at 29 GeV

Author: A. Petersen, J. M. Brom, A. Seiden, P. Voruganti, F. Butler, D. Hutchinson, Darien Wood, K. O'Shaughnessy, H. O. Ogren, J. A. Jaros, A. S. Schwarz, M. L. Perl, C. W. Peck, W. Koska, Kenneth G. Hayes, J. Boyer, K. Riles, G. Bonvicini, J. A. Kadyk, A. Breakstone, R. P. Thun, D.P. Coupal, Stephen Robert Wagner, E. Soderstrom, R. R. Larsen, Ryszard Stroynowski, D. Fujino, J. Hylef, M. S. Gold, G. H. Trilling, D. Nitz, Gerson Goldhaber, W. R. Innes, F. C. Porter, D. Y. Wu, P. Rankin, D. Amidei, R. Frey, B. D. Milliken, Timothy Barklow, E. Wicklund, P. C. Rowson, B. W. Leclaire, S. R. Klein, G. Hanson, A. J. Lankford, J. Haggerty, Jordan Nash, S. L. White, J. G. Smith, H. F.W. Sadrozinski, Alan Litke, Cords D, T. Schalk, W. B. Schmidke, S. Weisz, B. B. Brabson, Michael Levi, R. J. Hollebeek, F. Calviño, P. Weber, Patricia R. Burchat, D. E. Dorfan, M. Petradza, R. A. Ong, H. Veltman, B. A. Barnett, D. P. Stoker, W. Kozanecki, H. Schellman, G. S. Abrams, M. Jaffre, F. A. Harris, K. K. Gan, E. Fernandez, C.M. Hawkes, R. Tschirhart, Sherwood Parker, G. J. Feldman, George Gidal, R. C. Field, I. Bartelt, Fordham C, K.C. Moffeit, D. Herrup, A. J. Weinstein, T. Glanzman, J. A. J. Matthews, V. Luth, A. Snyder, P.S. Drell, W. T. Ford, L. Gladney, DeStaebler Hc, N. S. Lockyer, Mark E. Nelson, I. Juricic, R. J. Cence, B. C. Barish, D. Karlen, L. Müller, D. I. Meyer, J. M. Yelton, A. R. Baden, T. Himel, J. Kent, P. D. Sheldon, D. R. Rust, Burton Richter, D. Blockus, J. Dorfan, A. M. Boyarski, A. J. Weir, R. Van Kooten, James P. Alexander, A. Green, D. L. Burke, T. Schaad, M. Alvarez, Grosse-Wiesmann P, R. Harr, J. W. Chapman, Adolphsen Ce, C. A. Heusch, and F. Bulos
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, High Energy Physics::Phenomenology, Hadron, Astrophysics::Cosmology and Extragalactic Astrophysics, Measure (mathematics), Nuclear physics, High Energy Physics::Experiment, Mixing (physics), Storage ring, Lepton
Abstract: Data taken by the Mark II detector at the PEP storage ring was used to measure the rate of dilepton production in multihadronic events produced by e + e − annihilation at √ s =29 GeV. We determine the probability that a hadron initially containing a b (b) quark decays to a positive (negative) lepton to be 0.17 −0.08 +0.15 , with 90% confidence level limits of 0.06 and 0.38.
Published: 1990

46. Radiativeτproduction and decay

Author: D. Y. Wu, K. Hayes, M. L. Perl, T. Barklow, A. Boyarski, P. R. Burchat, D. L. Burke, J. M. Dorfan, G. J. Feldman, L. Gladney, G. Hanson, R. J. Hollebeek, W. R. Innes, J. A. Jaros, D. Karlen, S. R. Klein, A. J. Lankford, R. R. Larsen, B. W. LeClaire, N. S. Lockyer, V. Lüth, R. A. Ong, B. Richter, K. Riles, J. M. Yelton, G. Abrams, D. Amidei, A. R. Baden, J. Boyer, F. Butler, G. Gidal, M. S. Gold, G. Goldhaber, L. Golding, J. Haggerty, D. Herrup, I. Juricic, J. A. Kadyk, M. E. Levi, M. E. Nelson, P. C. Rowson, H. Schellman, W. B. Schmidke, P. D. Sheldon, G. H. Trilling, D. R. Wood, and T. Schaad
Subjects: Nuclear physics, Physics, Antiparticle, Muon, Annihilation, Branching fraction, Electron–positron annihilation, Bremsstrahlung, Radiative transfer, High Energy Physics::Experiment, Lepton
Abstract: A study of the muon decay channel of the τ lepton with the presence of a photon has been carried out to verify theoretical predictions for the production rate of e + e - → τ + τ - γ and for the branching ratio of τ - → ν τ µ - ν µ γ. Included in this study is the first direct measurement of radiative tau decay. Using e + e - annihilation data taken at 29 GeV center-of-mass energy with the Mark II detector, we find the ratio of the measured τ - → ν τ µ - ν µ γ branching fraction to the expected value from QED to be 1.03 ± 0.42. The ratio of measured-to-predicted number of events from radiative T production, e + e - → τ + τ - γ, where one of the τ's decay to μνν is found to be 0.91 ± 0.20. We have not seen an indication of anomalous behavior in radiative tau events.
Published: 1990

47. Measurements of charged-particle inclusive distributions in hadronic decays of theZboson

Author: G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, A. Petersen, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Quantum chromodynamics, Particle physics, Annihilation, Computer Science::Information Retrieval, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Charged particle, Nuclear physics, Particle decay, High Energy Physics::Experiment, Boson
Abstract: We have measured inclusive distributions for charged particles in hadronic decays of the {ital Z} boson. The variables chosen for study were charged-particle multiplicity, scaled momentum, and momenta transverse to the sphericity axes. The distributions have been corrected for detector effects and are compared with data from {ital e}{sup +}{ital e}{sup {minus}} annihilation at lower energies and with the predictions of several QCD-based models. The data are in reasonable agreement with expectations.
Published: 1990

48. Measurement of thebb¯fraction in hadronicZdecays

Author: J. F. Kral, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Nuclear physics, Physics, Particle physics, Particle decay, Annihilation, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Fermion, Lepton, Standard Model
Abstract: Using isolated leptons reconstructed in the Mark II detector to tag bb events, we measure the fraction of bb events in hadronic Z0 decays to be 0.23-0.09+0.11, in good agreement with the standard-model prediction of 0.22. We find (Zbb)=0.43-0.17+0.21 GeV. © 1990 The American Physical Society.
Published: 1990

49. Upper limits onD±andB±decays to two leptons plusπ±orK±

Author: T. Schalk, J. Dorfan, A. M. Boyarski, P. Voruganti, Jordan Nash, S. Weisz, E. Soderstrom, A. Seiden, Kenneth G. Hayes, James Alexander, D.P. Coupal, Stephen Robert Wagner, D. Herrup, J. S. Haggerty, D. L. Burke, G. Hanson, S.L. White, B. W. LeClaire, D. Karlen, K. C. Moffeit, A. Baden, Darien Wood, E. Wicklund, Fordham C, Paul Sheldon, M. S. Gold, Walter R. Innes, T. Schaad, D. Hutchinson, B. D. Milliken, H. O. Ogren, M. Petradza, R. A. Ong, D. E. Dorfan, Clemens A. Heusch, A. J.R. Weinstein, J. Ballam, P. Weber, Ryszard Stroynowski, D. Fujino, Carl W. Akerlof, G. Bonvicini, D. Nitz, D. Y. Wu, R. Van Kooten, Burton Richter, B. B. Brabson, I. Juricic, P. Rankin, J. G. Smith, L. Gladney, M. Jaffré, George Gidal, A. Green, J. Hylen, D. Blockus, M. P. Alvarez, F. Bulos, H. F.W. Sadrozinski, J. Boyer, G. J. Feldman, F. Calviño, R. Tschirhart, E. Fernandez, D. P. Stoker, K. K. Gan, H. Veltman, R. J. Cence, N. S. Lockyer, D. Amidei, J. A. J. Matthews, Gerson Goldhaber, B. C. Barish, H. Schellman, W. Kozanecki, R. Harr, J. A. Kadyk, Cords D, F. Butler, A. S. Schwarz, Michael Levi, DeStaebler Hc, T. Glanzman, J. Kent, A. Breakstone, W. B. Schmidke, G. S. Abrams, G. H. Trilling, John Yelton, K. O'Shaughnessy, R. J. Hollebeek, Mark E. Nelson, A. Petersen, C.M. Hawkes, R. Frey, C. W. Peck, S. R. Klein, R. C. Field, D. R. Rust, R. R. Larsen, P. C. Rowson, Adolphsen Ce, L. Müller, J. W. Chapman, W. T. Ford, F. A. Harris, Sherwood Parker, Grosse-Wiesmann P, A. J. Weir, W. Koska, K. Riles, Timothy Barklow, Alan Litke, A. J. Lankford, John E. Bartelt, Patricia R. Burchat, J. A. Jaros, V. Luth, A. Snyder, Persis S. Drell, T. Himel, R. P. Thun, B. A. Barnett, D. I. Meyer, Frank C. Porter, and Jean-Marie Brom
Subjects: Nuclear physics, Semileptonic decay, Physics, Particle decay, Particle physics, Pion, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Leptoquark, B meson, Lepton
Abstract: Data taken by the Mark II detector at the SLAC {ital e}{sup +}{ital e}{sup {minus}} storage ring PEP was used to search for exclusive decays of {ital D}{sup {plus minus}} and {ital B}{sup {plus minus}} mesons into two charged leptons plus a charged pion or kaon. All possible charge and lepton combinations consistent with charge conservation were considered and no evidence for any signals was found. We obtain upper limits for the various branching ratios ranging from 2.5{times}10{sup {minus}3} to 9.2{times}10{sup {minus}3}, at a 90% confidence level. Some of these limits can be used to constrain leptoquark masses in various models.
Published: 1990

50. International Linear Collider Reference Design Report

Author: C. Colledani, L. Raux, A. Giganon, G. Sajot, Giorgio Cavallari, L. Morin, E. Latour, Fabian Zomer, M. Benyamna, Frédéric Morel, G. Moultaka, F. Kircher, C. Carloganu, Francois Richard, J. Baudot, J. Lecoq, Michel Luong, J. C. Brient, Maurice Laloum, Damien Grandjean, Michel Chevallier, Richard Hermel, Chris Damerell, R. Cornat, C. Collard, Maarten Boonekamp, M. del Carmen Alabau, Jean-Charles Vanel, Nicholas Walker, J. Fleury, P. Colas, Perrine Royole-Degieux, J. Chauveau, P. Delebecque, L. Royer, Philip Bambade, J. A. Jaros, W. Da Silva, Catherine Adloff, Didier Jehanno, Sebastien Heini, H. Lebbolo, Sandrine Prat, Remi Lafaye, H. Mathez, I. Valin, Emilie Schibler, F. Kapusta, Mark Oreglia, Alex Mueller, Arnaud Lucotte, Christophe Vescovi, M. Reinhard, N. Pillet, O. Delferriere, Ties Behnke, Christophe Royon, J. E. Augustin, S. Wallon, C. Hugonie, B. Visentin, A. Levi Sanchez, Ritesh K. Singh, A. Deandrea, F. Dulucq, J-Y. Hostachy, R. Sefri, Didier Uriot, Marc Besancon, A. Besson, M. Davier, Nicolas Fourches, A. Rougé, Cécile Rimbault, C. Grojean, J. E. Brau, N. Brun, S. Chel, F. Le Diberder, N. Phinney, M. Anduze, Alessandro Variola, Guillaume Devanz, R. Chehab, R. Pöschl, Christine Hu-Guo, G. Doziere, N. Toge, B. Bouquet, Dirk Zerwas, F. Rossel, A. Himmi, C. De La Taille, Satoru Yamashita, A. Djouadi, N. Seguin-Moreau, Jean-Francois Grivaz, G. J. Grenier, Xavier Artru, C. Antoine, M. Margarete Muhlleitner, F. Morisseau, Didier Imbault, Andrei Dorokhov, I. Giomataris, C. Combaret, P. Lutz, H. Videau, David Attié, Bogdan Malaescu, Abdelhak Djouadi, Jean-Marc Virey, Y. Karyotakis, G. Martin-Chassard, D. Ninh Le, V. Boudry, Maximilien Chefdeville, S. Manen, Maksym Titov, P. Le Du, P. Vincent, H. Guler, Guillaume Blanchard, Sophie Henrot-Versille, R. Gaglione, Imad Baptiste Laktineh, Joseph Lykken, J. Payet, G. Wormser, Akiya Miyamoto, Fabien Eozenou, O. Dadoun, Stephane Caliier, Eric Lagorio, Marc Winter, D. Grondin, Klaus Mönig, Melanie Bruchon, J. David, J. Prast, E. Delagnes, A. Savoy-Navarro, C. Jauffret, T. Garvey, Pierre Bosland, Djamel Eddine Boumediene, F. Badaud, Yasuhiro Okada, A. Beteille, J.F. Genat, Marumi Kado, Olivier Napoly, Daniel Dzahini, Zhen Zhang, M. Knecht, Ph Gris, P. Mora de Freitas, L. Gallin-Martel, Frederic Chandez, D. L. Burke, M. Bedjidian, W. Dulinski, and C. Simon
Subjects: Physics, Theoretical physics, Spacetime, International Linear Collider, media_common.quotation_subject, Solar neutrino, Cosmic ray, Universal law, Particle physics experiments, Scientific theory, Universe, media_common
Abstract: {lg_bullet} What is the universe? How did it begin? {lg_bullet} What are matter and energy? What are space and time? These basic questions have been the subject of scientific theories and experiments throughout human history. The answers have revolutionized the enlightened view of the world, transforming society and advancing civilization. Universal laws and principles govern everyday phenomena, some of them manifesting themselves only at scales of time and distance far beyond everyday experience. Particle physics experiments using particle accelerators transform matter and energy, to reveal the basic workings of the universe. Other experiments exploit naturally occurring particles, such as solar neutrinos or cosmic rays, and astrophysical observations, to provide additional insights.
Published: 2007

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