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80 results on '"F. C. Shoemaker"'

2. Search for the decay K→πν in the momentum region P<195 MeV/c

Author

J. M. Poutissou, S. Ng, P. C. Bergbusch, T. Sasaki, A. J.S. Smith, Y. Yoshimura, R. Poutissou, R. A. McPherson, Takashi Nakano, M. Aoki, J. S. Frank, M. Ardebili, T. Numao, C. Witzig, J. A. Macdonald, L. S. Littenberg, T. Inagaki, Masaaki Kobayashi, Y. Kuno, T. Shinkawa, M. R. Convery, A. Konaka, J. S. Haggerty, M. M. Ito, R. Soluk, J. Mildenberger, F. C. Shoemaker, M. Kuriki, S. Kabe, J. R. Stone, M. V. Diwan, M. Kazumori, T. Sato, A. O. Bazarko, E. W. Blackmore, G. Redlinger, C. Ng, Norihito Muramatsu, K. K. Li, S. Sugimoto, Douglas Bryman, Daniel Robert Marlow, D. E. Jaffe, S. S. Adler, Peter Daniel Meyers, M. S. Atiya, T. F. Kycia, Vivek Jain, P. Kitching, B. Bhuyan, R. C. Strand, I. H. Chiang, S. H. Kettell, and T. K. Komatsubara

Subjects
Momentum, Physics, Nuclear and High Energy Physics, Pion, Branching fraction, Atomic physics, Neutral particle, Event (particle physics), Standard Model
Abstract

We have searched for the decay K + →π + ν ν in the kinematic region with pion momentum below the K + → π + π 0 peak. One event was observed, consistent with the background estimate of 0.73±0.18. This implies an upper limit on B(K + →π + ν ν ) −9 (90% C.L.), consistent with the recently measured branching ratio of 1.57 +1.75 −0.82 ×10 −10 , obtained using the standard model spectrum and the kinematic region above the K + → π + π 0 peak. The same data were used to search for K + → π + X 0 , where X 0 is a weakly interacting neutral particle or system of particles with 150 M X 0 c 2 .

Published
2002

3. Measurement of Direct Photon Emission inK+→π+π0γDecay

Author

M. S. Atiya, J. M. Poutissou, George Redlinger, A. Konaka, L. S. Littenberg, M. Kuriki, S. H. Kettell, T. Inagaki, T. Shinkawa, R. A. McPherson, S. S. Adler, M. Aoki, F. C. Shoemaker, K. K. Li, Douglas Bryman, R. Poutissou, J. R. Stone, Y. Yoshimura, T. Numao, C. Witzig, S. Sugimoto, J. S. Haggerty, R. Soluk, J. A. Macdonald, M. V. Diwan, M. M. Ito, Ewart W. Blackmore, P. D. Meyers, Norihito Muramatsu, T. Nakano, M. Ardebili, Y. Kuno, Motoki Kobayashi, Y. Kishi, S. Kabe, T. Sato, M. R. Convery, P. C. Bergbusch, I-Hung Chiang, T. F. Kycia, James Frank, J. Mildenberger, R. C. Strand, T. K. Komatsubara, and P. Kitching

Subjects
Physics, Meson, Branching fraction, Hadron, Bremsstrahlung, General Physics and Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Kinetic energy, Electromagnetic radiation, Nuclear physics, Particle decay, Pion, High Energy Physics::Experiment, Atomic physics
Abstract

We have performed a measurement of the K + !� + � 0 decay and have observed 2×10 4 events. The best fit to the decay spectrum gives a branching ratio for direct photon emission of (4.7 ± 0.8 ± 0.3) × 10 6 in the � + kinetic energy region of 55 to 90 MeV and requires no component due to interference with inner bremsstrahlung.

Published
2000

4. Measurement of Structure-Dependent K+→μ+νμγ Decay

Author

Y. Kishi, S. S. Adler, A. Stevens, M. Kuriki, P. C. Bergbusch, George Redlinger, M. S. Atiya, T. Sato, S. H. Kettell, I-Hung Chiang, M. Aoki, J. R. Stone, J. Mildenberger, F. C. Shoemaker, R. C. Strand, T. K. Komatsubara, T. Numao, J. A. Macdonald, K. K. Li, S. Sugimoto, M. R. Convery, P. Kitching, R. A. McPherson, Douglas Bryman, M. Ardebili, T. F. Kycia, Motoki Kobayashi, James Frank, J. M. Poutissou, S. Kabe, C. Witzig, Y. Yoshimura, M. V. Diwan, J. S. Haggerty, A. J.S. Smith, T. Inagaki, L. S. Littenberg, Ewart W. Blackmore, R. Soluk, P. D. Meyers, Norihito Muramatsu, Y. Kuno, T. Nakano, P. Padley, A. Sambamurti, R. Poutissou, Daniel Robert Marlow, A. Konaka, M. M. Ito, and T. Shinkawa

Subjects
Physics, Muon, Branching fraction, Radiative decay, Structure (category theory), General Physics and Astronomy, Absolute value (algebra), Atomic physics, Photon energy, Kinetic energy
Abstract

We report the first measurement of a structure-dependent component in the decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\gamma}$. Using the kinematic region where the muon kinetic energy is greater than 137 MeV and the photon energy is greater than 90 MeV, we find that the absolute value of the sum of the vector and axial-vector form factors is $|{F}_{V}{+F}_{A}|\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.165\ifmmode\pm\else\textpm\fi{}0.007\ifmmode\pm\else\textpm\fi{}0.011$. This corresponds to a branching ratio of $B({\mathrm{SD}}^{+})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(1.33\ifmmode\pm\else\textpm\fi{}0.12\ifmmode\pm\else\textpm\fi{}0.18)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$. We also set the limit $\ensuremath{-}0.04l{F}_{V}{\ensuremath{-}F}_{A}l0.24$ at $90%$ C.L.

Published
2000

5. Observation of the DecayK+→π+μ+μ−

Author

J. S. Frank, A. Stevens, M. R. Convery, Peter Daniel Meyers, M. Ardebili, Mats A Selen, L. S. Littenberg, Ewart W. Blackmore, A. S. Turcot, D. S. Akerib, P. Kitching, R. A. McPherson, M. M. Ito, P. Padley, J. S. Haggerty, S. S. Adler, A. J.S. Smith, J. M. Poutissou, R. C. Strand, L. Felawka, R. Soluk, I. H. Chiang, T. Numao, R. Poutissou, W. C. Louis, T. F. Kycia, J. A. Macdonald, T. Nakano, Y. Kuno, A. Sambamurti, M. S. Atiya, J. Roy, K. K. Li, Daniel Robert Marlow, Douglas Bryman, C. Witzig, M. Rozon, F. C. Shoemaker, and A. Konaka

Subjects
Semileptonic decay, Physics, Quantum chromodynamics, Chiral symmetry, Particle physics, Chiral perturbation theory, Unitarity, Branching fraction, General Physics and Astronomy, Particle decay, Crystallography, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Atomic physics, Perturbation theory
Abstract

The first observation of the decay K{sup +}{r_arrow}{pi}{sup +}{gamma}{gamma} is reported. A total of 31 events was observed with an estimated background of 5.1{plus_minus}3.3 events in the {pi}{sup +} momentum range from 100 to 180 MeV/{ital c}. The corresponding partial branching ratio, B(K{sup +}{r_arrow}{pi}{sup +}{gamma}{gamma} ,100 MeV/c{lt}P{sub {pi}{sup +} }{lt}180 MeV/c) , is [6.0{plus_minus}1.5(stat){plus_minus}0.7 (syst)]{times}10{sup {minus}7} . No K{sup +}{r_arrow}{pi}{sup +}{gamma}{gamma} decay was observed in the {pi}{sup +} momentum region greater than 215 MeV/{ital c}. The observed {pi}{sup +} momentum spectrum is compared with the predictions of chiral perturbation theory. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997

6. Evidence for the DecayK+→π+νν¯

Author

Ewart W. Blackmore, R. A. McPherson, S. H. Kettell, Y. Kuno, P. D. Meyers, J. S. Haggerty, Masaaki Kobayashi, Norihito Muramatsu, M. Kuriki, A. Stevens, A. J.S. Smith, P. C. Bergbusch, J. Roy, R. Poutissou, Stephen L. Adler, R. Soluk, T. Shinkawa, J. M. Poutissou, T. Nakano, T. Sato, J. R. Stone, George Redlinger, L. S. Littenberg, T. Numao, A. Sambamurti, A. O. Bazarko, M. R. Convery, Y. Kishi, J. A. Macdonald, M. Aoki, T. Inagaki, M. V. Diwan, S. Sugimoto, Daniel Robert Marlow, M. Ardebili, M. S. Atiya, Y. Yoshimura, A. Konaka, A. S. Turcot, J. Mildenberger, R. C. Strand, I-H. Chiang, T. K. Komatsubara, F. C. Shoemaker, C. Ng, M. M. Ito, T. F. Kycia, James Frank, P. Padley, P. Kitching, S. Kabe, K. K. Li, Douglas Bryman, and C. Witzig

Subjects
Momentum, Physics, Particle physics, Pion, Branching fraction, General Physics and Astronomy
Abstract

An event consistent with the signature expected for the rare kaon decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ has been observed. In the pion momentum region examined, $211lPl230\mathrm{MeV}/c$, the backgrounds are estimated to contribute $0.08\ifmmode\pm\else\textpm\fi{}0.03$ events. If the event is due to ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, the branching ratio is ${4.2}_{\ensuremath{-}3.5}^{+9.7}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$.

Published
1997

7. Search for the DecayK+→π+νν¯

Author

I. H. Chiang, L. S. Littenberg, S. S. Adler, M. S. Atiya, D. S. Akerib, A. S. Turcot, R. Soluk, K. K. Li, Douglas Bryman, A. Sambamurti, Mats A Selen, A. Stevens, L. Felawka, T. Numao, C. Witzig, Y. Kuno, V. A. Kujala, Robert McPherson, M. M. Ito, M. R. Convery, J. S. Haggerty, T. Nakano, Ewart W. Blackmore, P. Kitching, Daniel Robert Marlow, F. C. Shoemaker, R. C. Strand, A. Konaka, M. Ardebili, R. Poutissou, J. M. Poutissou, T. F. Kycia, A. J.S. Smith, James Frank, W. C. Louis, J. A. Macdonald, P. Padley, J. Roy, and P. D. Meyers

Subjects
Physics, Particle physics, Pion, Overline, Branching fraction, Nuclear Theory, High Energy Physics::Phenomenology, Pi, General Physics and Astronomy, High Energy Physics::Experiment, Limit (mathematics), Nuclear Experiment
Abstract

An upper limit on the branching ratio for the decay $K^+ \! \rightarrow \! \pi^+ \nu \overline{\nu}$ is set at $2.4 \times 10^{-9}$ at the 90\% C.L. using pions in the kinematic region $214~{\rm MeV}/c 0$.

Published
1996

8. Dual baseline search for muon neutrino disappearance at0.5 eV2<Δm2<40 eV2

Author

L. Bugel, Panagiotis Spentzouris, D. Orme, S. Mizugashira, E. Hawker, T. A. Shibata, H. Ray, J. A. Green, H. B. White, B. J. P. Jones, R. G. Van de Water, Y. Kobayashi, W. Metcalf, J. A. Nowak, R. B. Patterson, J. J. Walding, J. Grange, J. L. Raaf, P. D. Meyers, G. Karagiorgi, P. Nienaber, J. Catala-Perez, G. P. Zeller, V. T. McGary, A. Curioni, R. Dharmapalan, I. Stancu, R. Imlay, G. Cheng, M. O. Wascko, Zelimir Djurcic, C. C. Polly, M. Sung, S. Ouedraogo, H. Takei, R. A. Johnson, C. Giganti, S. Masuike, R. Ford, T. L. Hart, A. O. Bazarko, C. Green, R. H. Nelson, Y. Uchida, A. D. Russell, Z. Pavlovic, M. H. Shaevitz, M. Soderberg, I. J. Taylor, I. Kourbanis, Yasuhiro Nakajima, David Smith, E. D. Zimmerman, G. Mitsuka, R. Napora, L. Ludovici, M. Sorel, Federico Sanchez, Alexis A. Aguilar-Arevalo, B. Osmanov, S. Koutsoliotas, F. Mills, D. A. Finley, Katsuki Hiraide, Jocelyn Monroe, C. E. Anderson, D. H. White, M. Tzanov, W. C. Louis, F. G. Garcia, Y. Miyachi, Y. L. Liu, W. Huelsnitz, T. Kobilarcik, B. C. Brown, B. P. Roe, C. Mariani, M. J. Wilking, Y. Hayato, J. Mousseau, S. J. Brice, D. W. Schmitz, E. M. Laird, R. J. Tesarek, D. C. Cox, Masashi Yokoyama, M. Tanaka, P. H. Kasper, G. McGregor, Andrew J. Hanson, A. J. Franke, Kodai Matsuoka, H. K. Tanaka, Tsuyoshi Nakaya, U. Dore, V. D. Sandberg, Hidetoshi Kubo, C. Mauger, J. M. Link, Y. Kurimoto, C. D. Moore, H. A. Tanaka, H. J. Yang, G. Jover-Manas, P. Guzowski, Rex Tayloe, Janet Conrad, B. T. Fleming, S. K. Linden, E.J. Prebys, J. Spitz, R. J. Stefanski, L. Coney, R. Schirato, G. T. Garvey, J.J. Gómez-Cadenas, Jun Cao, F. C. Shoemaker, D. Perevalov, J. L. Alcaraz-Aunion, G. B. Mills, Kendall Mahn, W. Marsh, Minoru Otani, Teppei Katori, and P. F. Loverre

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Cherenkov detector, Detector, law.invention, Nuclear physics, MiniBooNE, law, Muon neutrino, Fermilab, Neutrino, Neutrino oscillation, Charged current
Abstract

The SciBooNE and MiniBooNE collaborations report the results of a νμ disappearance search in the Δ'm2 region of 0.5-40 eV2. The neutrino rate as measured by the SciBooNE tracking detectors is used to constrain the rate at the MiniBooNE Cherenkov detector in the first joint analysis of data from both collaborations. Two separate analyses of the combined data samples set 90% confidence level (CL) limits on νμ disappearance in the 0.5-40 eV2 Δm2 region, with an improvement over previous experimental constraints between 10 and 30 eV2

Published
2012

9. Measurement ofνμ-induced charged-current neutral pion production cross sections on mineral oil atEν∈0.5–2.0 GeV

Author

Janet Conrad, R. Ford, C. Green, B. T. Fleming, Alexis A. Aguilar-Arevalo, S. Koutsoliotas, R. J. Stefanski, F. Mills, M. Soderberg, S. K. Linden, J. Spitz, R. Dharmapalan, W. Marsh, E.J. Prebys, A. Curioni, W. Metcalf, B. P. Roe, M. Sung, David Smith, S. Ouedraogo, B. C. Brown, A. D. Russell, Teppei Katori, H. J. Yang, V. D. Sandberg, T. L. Hart, D. W. Schmitz, R. Schirato, M. H. Shaevitz, G. T. Garvey, J. M. Link, C. E. Anderson, M. J. Wilking, R. B. Patterson, R. H. Nelson, G. P. Zeller, D. Perevalov, M. Tzanov, Rex Tayloe, P. D. Meyers, F. G. Garcia, Jun Cao, Z. Djurcic, G. Karagiorgi, Jocelyn Monroe, P. H. Kasper, P. Nienaber, I. Stancu, Kendall Mahn, L. Bugel, D. H. White, G. B. Mills, R. Imlay, W. C. Louis, B. Osmanov, M. O. Wascko, D. C. Cox, G. McGregor, E. D. Zimmerman, T. Kobilarcik, Y. L. Liu, J. Grange, F. C. Shoemaker, S. J. Brice, A. O. Bazarko, M. Sorel, E. Hawker, H. Ray, R. G. Van de Water, V. T. McGary, J. A. Nowak, C. Mauger, C. D. Moore, H. A. Tanaka, J. Mousseau, E. M. Laird, J. A. Green, Panagiotis Spentzouris, J. L. Raaf, R. A. Johnson, C. C. Polly, I. Kourbanis, D. A. Finley, Z. Pavlovic, and L. Coney

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Physics::Instrumentation and Detectors, Nuclear physics, Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Neutrino, Energy source, Charged current, Lepton
Abstract

The authors would like to acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation in the construction, operation, and data analysis of the Mini Booster Neutrino Experiment.

Published
2011

10. Measurement of neutrino-induced charged-current charged pion production cross sections on mineral oil atEν∼1 GeV

Author

A. A. Aguilar-Arevalo, C. E. Anderson, A. O. Bazarko, S. J. Brice, B. C. Brown, L. Bugel, J. Cao, L. Coney, J. M. Conrad, D. C. Cox, A. Curioni, R. Dharmapalan, Z. Djurcic, D. A. Finley, B. T. Fleming, R. Ford, F. G. Garcia, G. T. Garvey, J. Grange, C. Green, J. A. Green, T. L. Hart, E. Hawker, R. Imlay, R. A. Johnson, G. Karagiorgi, P. Kasper, T. Katori, T. Kobilarcik, I. Kourbanis, S. Koutsoliotas, E. M. Laird, S. K. Linden, J. M. Link, Y. Liu, W. C. Louis, K. B. M. Mahn, W. Marsh, C. Mauger, V. T. McGary, G. McGregor, W. Metcalf, P. D. Meyers, F. Mills, G. B. Mills, J. Monroe, C. D. Moore, J. Mousseau, R. H. Nelson, P. Nienaber, J. A. Nowak, B. Osmanov, S. Ouedraogo, R. B. Patterson, Z. Pavlovic, D. Perevalov, C. C. Polly, E. Prebys, J. L. Raaf, H. Ray, B. P. Roe, A. D. Russell, V. Sandberg, R. Schirato, D. Schmitz, M. H. Shaevitz, F. C. Shoemaker, D. Smith, M. Soderberg, M. Sorel, P. Spentzouris, J. Spitz, I. Stancu, R. J. Stefanski, M. Sung, H. A. Tanaka, R. Tayloe, M. Tzanov, R. Van de Water, M. O. Wascko, D. H. White, M. J. Wilking, H. J. Yang, G. P. Zeller, and E. D. Zimmerman

Subjects
MiniBooNE, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Pion, Meson, High Energy Physics::Experiment, Neutrino, Energy source, Charged current, Lepton
Abstract

Using a high-statistics, high-purity sample of {nu}{sub {mu}-}induced charged current, charged pion events in mineral oil (CH{sub 2}), MiniBooNE reports a collection of interaction cross sections for this process. This includes measurements of the CC{pi}{sup +} cross section as a function of neutrino energy, as well as flux-averaged single- and double-differential cross sections of the energy and direction of both the final-state muon and pion. In addition, each of the single-differential cross sections are extracted as a function of neutrino energy to decouple the shape of the MiniBooNE energy spectrum from the results. In many cases, these cross sections are the first time such quantities have been measured on a nuclear target and in the 1 GeV energy range.

Published
2011

11. Search for the decaysK+→π+νν¯andK+→π+X0for150<MX0<250MeV/c2

Author

A. S. Turcot, P. Padley, T. Numao, Daniel Robert Marlow, A. Konaka, R. C. Strand, A. Stevens, Peter Daniel Meyers, J. A. Macdonald, L. S. Littenberg, Mats A Selen, M. M. Ito, J. Roy, R. Poutissou, D. S. Akerib, I-Hung Chiang, J. M. Poutissou, W. C. Louis, Y. Kuno, M. S. Atiya, Ewart W. Blackmore, R. Soluk, J. S. Haggerty, F. C. Shoemaker, L. Felawka, A. Sambamurti, K. K. Li, A. J.S. Smith, Douglas Bryman, P. Kitching, T. F. Kycia, and James Frank

Subjects
Physics, Antiparticle, Particle physics, Particle decay, Crystallography, Pion, Meson, Branching fraction, Hadron, Elementary particle, Boson
Abstract

A search for the decays ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ and ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{X}^{0}$, where ${X}^{0}$ is any weakly interacting neutral particle or system of neutral particles with $150l{M}_{{X}^{0}}l250$ MeV/${\mathit{c}}^{2}$, was performed in the pion kinematic region below the ${K}_{\ensuremath{\pi}2}({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0})$ peak. An upper limit on $B({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}})$ is set at 1.7 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}8}$ (90% C.L.) and $B({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{X}^{0})$ is restricted to the ${10}^{\ensuremath{-}7}$ level or lower. Limits are also set for the production of ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ through scalar or tensor interactions at 1.8 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}8}$ and 1.0 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}8}$ (90% C.L.), respectively.

Published
1993

12. Search for the DecayK+→π+νν¯

Author

Ewart W. Blackmore, Y. Kuno, W. C. Louis, T. F. Kycia, K. K. Li, Douglas Bryman, L. Felawka, M. M. Ito, J. S. Haggerty, I-Hung Chiang, A. S. Turcot, James Frank, A. J.S. Smith, Daniel Robert Marlow, F. C. Shoemaker, P. Padley, A. Konaka, Mats A Selen, A. Sambamurti, M. S. Atiya, P. Kitching, J. Roy, R. Soluk, R. C. Strand, P. D. Meyers, T. Numao, A. Stevens, J. M. Poutissou, L. S. Littenberg, D. S. Akerib, R. Poutissou, and J. A. Macdonald

Subjects
Physics, Semileptonic decay, Particle physics, Meson, Branching fraction, Particle model, General Physics and Astronomy, Massless particle, Combinatorics, Particle decay, Pion, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Pi, Neutral particle, Bar (unit)
Abstract

An upper limit on the branching ratio for the decay [ital K][sup +][r arrow][pi][sup +][nu][bar [nu]] is set at 7.5[times]10[sup [minus]9] (90% C.L.) using the kinematic region above the [ital K][sub [pi]2]([ital K][sup +][r arrow][pi][sup +][pi][sup 0]) peak. When combined with our result from below the [ital K][sub [pi]2] peak, we obtain the limit 5.2[times]10[sup [minus]9]. An upper limit of 1.7[times]10[sup [minus]9] is also found on the branching ratio for decays of the form [ital K][sup +][r arrow][pi][sup +][ital X0] where [ital X][sup 0] is any massless, weakly interacting neutral particle. Limits are also set for cases where [ital M][sub [ital X]][sup 0][gt]0.

Published
1993

13. Measurement of the neutrino neutral-current elastic differential cross section on mineral oil atEν∼1 GeV

Author

B. Osmanov, I. Kourbanis, D. Perevalov, J. A. Green, D. A. Finley, J. L. Raaf, R. A. Johnson, G. Karagiorgi, P. Nienaber, W. C. Louis, C. E. Anderson, M. Tzanov, F. G. Garcia, Kendall Mahn, E. D. Zimmerman, M. Soderberg, I. Stancu, E. Hawker, C. D. Moore, G. P. Zeller, W. Marsh, H. A. Tanaka, H. Ray, C. Green, Janet Conrad, T. L. Hart, F. Mills, R. G. Van de Water, M. H. Shaevitz, Teppei Katori, Y. L. Liu, J. Cao, R. J. Stefanski, V. T. McGary, D. W. Schmitz, L. Coney, S. Koutsoliotas, Rex Tayloe, G. B. Mills, J. A. Nowak, R. B. Patterson, D. H. White, Z. Djurcic, David Smith, M. O. Wascko, P. H. Kasper, A. D. Russell, B. C. Brown, R. Schirato, G. T. Garvey, Alexis A. Aguilar-Arevalo, R. Ford, L. Bugel, T. Kobilarcik, F. C. Shoemaker, R. H. Nelson, Z. Pavlovic, C. C. Polly, A. Curioni, M. Sung, J. Spitz, M. Sorel, B. T. Fleming, D. C. Cox, S. K. Linden, E.J. Prebys, G. McGregor, S. Ouedraogo, Panagiotis Spentzouris, J. Grange, A. O. Bazarko, J. Mousseau, E. M. Laird, R. Dharmapalan, R. Imlay, Jocelyn Monroe, W. Metcalf, H. J. Yang, S. J. Brice, P. D. Meyers, C. Mauger, M. J. Wilking, B. P. Roe, V. D. Sandberg, and J. M. Link

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Form factor (quantum field theory), Nuclear physics, Baryon, MiniBooNE, Neutrino, Nuclear Experiment, Nucleon, Energy (signal processing), Lepton
Abstract

We report a measurement of the flux-averaged neutral-current elastic differential cross section for neutrinos scattering on mineral oil (CH{sub 2}) as a function of four-momentum transferred squared, Q{sup 2}. It is obtained by measuring the kinematics of recoiling nucleons with kinetic energy greater than 50 MeV which are readily detected in MiniBooNE. This differential cross-section distribution is fit with fixed nucleon form factors apart from an axial mass M{sub A} that provides a best fit for M{sub A}=1.39{+-}0.11 GeV. Using the data from the charged-current neutrino interaction sample, a ratio of neutral-current to charged-current quasielastic cross sections as a function of Q{sup 2} has been measured. Additionally, single protons with kinetic energies above 350 MeV can be distinguished from neutrons and multiple nucleon events. Using this marker, the strange quark contribution to the neutral-current axial vector form factor at Q{sup 2}=0, {Delta}s, is found to be {Delta}s=0.08{+-}0.26.

Published
2010

14. Measurement of theK+→π0μ+νμγbranching ratio

Author

Y. Yoshimura, T. Nomura, Vivek Jain, M. M. Ito, P. Kitching, C. Witzig, K. Shimada, James Frank, M. Kuriki, J. R. Stone, A. Konaka, T. Shinkawa, P. C. Bergbusch, Yoichi Tamagawa, S. Sugimoto, J. Mildenberger, R. C. Strand, T. K. Komatsubara, A. O. Bazarko, I. H. Chiang, T. Shimoyama, Song Chen, Y. Kuno, S. H. Kettell, T. Fujiwara, M. Miyajima, T. Tsunemi, Masaaki Kobayashi, C. Ng, K. K. Li, Douglas Bryman, M. V. Diwan, J. Hu, R. Poutissou, S. Kabe, S. Ng, T. Inagaki, Ewart W. Blackmore, J. M. Poutissou, T. Numao, J. A. Macdonald, F. C. Shoemaker, T. Sato, L. S. Littenberg, P. D. Meyers, Norihito Muramatsu, G. Redlinger, S. S. Adler, J. S. Haggerty, T. Nakano, and D. E. Jaffe

Subjects
Physics, Nuclear and High Energy Physics, Antiparticle, Muon, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Particle decay, Pion, Antimatter, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Energy (signal processing), Dimensionless quantity
Abstract

A measurement of the decay K{sup +{yields}{pi}0{mu}+{nu}}{sub {mu}{gamma}}has been performed with the E787 detector at Brookhaven National Laboratory. Forty events were observed in the signal region with the background expectation of (16.5{+-}2.7) events. The branching ratio was measured to be (1.58{+-}0.46(stat.){+-}0.08(syst.))x10{sup -5} in the kinematic region E{sub {gamma}>}30 MeV and {theta}{sub {mu}{gamma}>}20 deg., where E{sub {gamma}}is the energy of the emitted photon and {theta}{sub {mu}{gamma}}is the angle between the muon and the photon in the K{sup +} rest frame. The results were consistent with theoretical predictions.

Published
2010

15. Publisher’s Note: Measurement of the Ratio of theνμCharged-Current Single-Pion Production to Quasielastic Scattering with a 0.8 GeV Neutrino Beam on Mineral Oil [Phys. Rev. Lett.103, 081801 (2009)]

Author

A. A. Aguilar-Arevalo, C. E. Anderson, A. O. Bazarko, S. J. Brice, B. C. Brown, L. Bugel, J. Cao, L. Coney, J. M. Conrad, D. C. Cox, A. Curioni, Z. Djurcic, D. A. Finley, B. T. Fleming, R. Ford, F. G. Garcia, G. T. Garvey, C. Green, J. A. Green, T. L. Hart, E. Hawker, R. Imlay, R. A. Johnson, G. Karagiorgi, P. Kasper, T. Katori, T. Kobilarcik, I. Kourbanis, S. Koutsoliotas, E. M. Laird, S. K. Linden, J. M. Link, Y. Liu, W. C. Louis, K. B. M. Mahn, W. Marsh, V. T. McGary, G. McGregor, W. Metcalf, P. D. Meyers, F. Mills, G. B. Mills, J. Monroe, C. D. Moore, R. H. Nelson, P. Nienaber, J. A. Nowak, B. Osmanov, S. Ouedraogo, R. B. Patterson, D. Perevalov, C. C. Polly, E. Prebys, J. L. Raaf, H. Ray, B. P. Roe, A. D. Russell, V. Sandberg, R. Schirato, D. Schmitz, M. H. Shaevitz, F. C. Shoemaker, D. Smith, M. Soderberg, M. Sorel, P. Spentzouris, J. Spitz, I. Stancu, R. J. Stefanski, M. Sung, H. A. Tanaka, R. Tayloe, M. Tzanov, R. Van de Water, M. O. Wascko, D. H. White, M. J. Wilking, H. J. Yang, G. P. Zeller, and E. D. Zimmerman

Subjects
Physics, Nuclear physics, Nuclear reaction, Quasielastic scattering, Particle physics, Pion, Scattering, General Physics and Astronomy, Neutrino, Energy source, Charged current, Lepton
Published
2010

16. Measurement ofνμandν¯μinduced neutral current singleπ0production cross sections on mineral oil atEν∼O(1 GeV)

Author

W. C. Louis, T. Kobilarcik, Z. Pavlovic, D. C. Cox, G. McGregor, F. Mills, M. Soderberg, L. Coney, F. C. Shoemaker, S. J. Brice, G. Karagiorgi, Janet Conrad, G. P. Zeller, J. Grange, P. Nienaber, D. H. White, Rex Tayloe, J. A. Green, J. L. Raaf, W. Marsh, A. D. Russell, E. Hawker, R. J. Stefanski, Y. Liu, B. Osmanov, C. C. Polly, H. Ray, R. G. Van de Water, R. A. Johnson, D. W. Schmitz, J. A. Nowak, Teppei Katori, Jun Cao, Z. Djurcic, I. Stancu, I. Kourbanis, D. Perevalov, R. Imlay, Alexis A. Aguilar-Arevalo, M. Sorel, David Smith, L. Bugel, Kendall Mahn, G. B. Mills, A. O. Bazarko, D. A. Finley, C. D. Moore, H. A. Tanaka, V. T. McGary, T. L. Hart, H. J. Yang, Panagiotis Spentzouris, B. C. Brown, M. H. Shaevitz, R. B. Patterson, A. Curioni, M. Sung, B. T. Fleming, S. K. Linden, E. D. Zimmerman, S. Koutsoliotas, S. Ouedraogo, E.J. Prebys, M. O. Wascko, R. H. Nelson, C. E. Anderson, M. Tzanov, F. G. Garcia, J. Spitz, R. Schirato, G. T. Garvey, R. Ford, J. Mousseau, C. Green, P. H. Kasper, E. M. Laird, B. P. Roe, W. Metcalf, M. J. Wilking, Jocelyn Monroe, V. D. Sandberg, J. M. Link, P. D. Meyers, C. Mauger, and J. Gonzales

Subjects
MiniBooNE, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Hadron, Production (computer science), Neutrino, Nucleon, Energy (signal processing), Lepton
Abstract

MiniBooNE reports the first absolute cross sections for neutral current single {pi}{sup 0} production on CH{sub 2} induced by neutrino and antineutrino interactions measured from the largest sets of NC {pi}{sup 0} events collected to date. The principal result consists of differential cross sections measured as functions of {pi}{sup 0} momentum and {pi}{sup 0} angle averaged over the neutrino flux at MiniBooNE. We find total cross sections of (4.76 {+-} 0.05{sub stat} {+-} 0.40{sub sys}) x 10{sup -40} cm{sup 2}/nucleon at a mean energy of = 808 MeV and (1.48 {+-} 0.05{sub stat} {+-} 0.14{sub sys}) x 10{sup -40} cm{sup 2}/nucleon at a mean energy of = 664 MeV for {nu}{sub {mu}} and {bar {nu}}{sub {mu}} induced production, respectively. In addition, we have included measurements of the neutrino and antineutrino total cross sections for incoherent exclusive NC 1{pi}{sup 0} production corrected for the effects of final state interactions to compare to prior results.

Published
2010

17. Search for Core-Collapse Supernovae using the MiniBooNE Neutrino Detector

Author

A. A. Aguilar-Arevalo, C. E. Anderson, A. O. Bazarko, S. J. Brice, B. C. Brown, L. Bugel, J. Cao, L. Coney, J. M. Conrad, D. C. Cox, A. Curioni, Z. Djurcic, D. A. Finley, M. Fisher, B. T. Fleming, R. Ford, F. G. Garcia, G. T. Garvey, J. Grange, C. Green, J. A. Green, T. L. Hart, E. Hawker, R. Imlay, R. A. Johnson, G. Karagiorgi, P. Kasper, T. Katori, T. Kobilarcik, I. Kourbanis, S. Koutsoliotas, E. M. Laird, S. K. Linden, J. M. Link, Y. Liu, W. C. Louis, K. B. M. Mahn, W. Marsh, C. Mauger, V. T. McGary, G. McGregor, W. Metcalf, P. D. Meyers, F. Mills, G. B. Mills, J. Monroe, C. D. Moore, J. Mousseau, R. H. Nelson, P. Nienaber, J. A. Nowak, B. Osmanov, S. Ouedraogo, R. B. Patterson, Z. Pavlovic, D. Perevalov, C. C. Polly, E. Prebys, J. L. Raaf, H. Ray, B. P. Roe, A. D. Russell, V. Sandberg, R. Schirato, D. Schmitz, M. H. Shaevitz, F. C. Shoemaker, D. Smith, M. Soderberg, M. Sorel, P. Spentzouris, J. Spitz, I. Stancu, R. J. Stefanski, M. Sung, H. A. Tanaka, R. Tayloe, M. Tzanov, R. G. Van de Water, M. O. Wascko, D. H. White, M. J. Wilking, H. J. Yang, G. P. Zeller, and E. D. Zimmerman

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Nuclear and High Energy Physics, Research Groups and Centres\Physics\Low Temperature Physics, Faculty of Science\Physics, Milky Way, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, MiniBooNE, Supernova, Neutrino detector, Gravitational collapse, High Energy Physics::Experiment, Variable star, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract

We present a search for core-collapse supernovae in the Milky Way galaxy, using the MiniBooNE neutrino detector. No evidence is found for core-collapse supernovae occurring in our Galaxy in the period from December 14, 2004 to July 31, 2008, corresponding to 98% live time for collection. We set a limit on the core-collapse supernova rate out to a distance of 13.4 kpc to be less than 0.69 supernovae per year at 90% C. L., We acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation. We are grateful to John Beacom for his valuable insight and advice. We thank Alessandro Mirizzi, Georg G. Raffelt, and Pasquale D. Serpico for providing the probability distribution for the Milky Way.

Published
2010

18. A detector to search for

Author

Holly H. Edwards, L. Felawka, L. S. Littenberg, Y. Kuno, D. S. Akerib, A. Konaka, J. S. Haggerty, Nadeem A. Khan, J. Roy, A. S. Turcot, P. D. Meyers, A. J.S. Smith, Chen Lejun, P. Padley, P. Kitching, R. Poutissou, J.V. Cresswell, E. Garber, C. Ng, R. Rosenka, Shafqat Ahmad, Daniel Robert Marlow, J. M. Poutissou, J. S. Frank, K. K. Li, W. C. Louis, I. Polk, Douglas Bryman, Mats A Selen, F. C. Shoemaker, T. Numao, J. A. Macdonald, R. C. Strand, A. Stevens, C. Zein, M. M. Ito, A. Sambamurti, M. S. Atiya, T. F. Kycia, Ewart W. Blackmore, R. Soluk, and I. H. Chiang

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Nuclear magnetic resonance, Detector, Measure (physics), National laboratory, Instrumentation
Abstract

The detector built for experiment 787 to measure the decay K + → π + ν ν at Brookhaven National Laboratory is describe

Published
1992

19. Search for the decayπ0→γ+X

Author

P. Kitching, J. S. Haggerty, K. K. Li, Daniel Robert Marlow, L. Felawka, Douglas Bryman, Mats A Selen, R. Poutissou, A. J.S. Smith, T. F. Kycia, J. M. Poutissou, Y. Kuno, A. Konaka, Ewart W. Blackmore, T. Numao, R. C. Strand, W. C. Louis, J. A. Macdonald, J. Roy, M. M. Ito, A. Sambamurti, J. S. Frank, F. C. Shoemaker, M. S. Atiya, A. J. Stevens, I. H. Chiang, A. S. Turcot, P. Padley, L. S. Littenberg, D. S. Akerib, and P. D. Meyers

Subjects
Physics, Nuclear physics, Pion, Branching fraction, General Physics and Astronomy, Elementary particle, Neutral vector, Two-body problem, Three-body problem, Neutral particle, Upper and lower bounds
Abstract

A search for the decay π 0 →γX, where X is any long-lived weakly interacting neutral vector particle with mass smaller than the neutral pion mass, was performed using neutral pions tagged by K + →π + π 0 . A 90%-C.L. upper limit for the branching ratio of the two-body decay B(π 0 →γX)

Published
1992

20. Further Search for the DecayK+→π+νν¯

Author

S. Adler, M. S. Atiya, I-H. Chiang, M. V. Diwan, J. S. Frank, J. S. Haggerty, V. Jain, S. H. Kettell, T. F. Kycia, K. K. Li, L. S. Littenberg, C. Ng, R. C. Strand, C. Witzig, M. Kazumori, T. K. Komatsubara, M. Kuriki, N. Muramatsu, A. Otomo, S. Sugimoto, T. Inagaki, S. Kabe, M. Kobayashi, Y. Kuno, T. Sato, T. Shinkawa, Y. Yoshimura, Y. Kishi, T. Nakano, T. Sasaki, M. Ardebili, A. O. Bazarko, M. R. Convery, M. M. Ito, D. R. Marlow, R. A. McPherson, P. D. Meyers, F. C. Shoemaker, A. J. S. Smith, J. R. Stone, M. Aoki, P. C. Bergbusch, E. W. Blackmore, D. A. Bryman, A. Konaka, J. A. Macdonald, J. Mildenberger, T. Numao, P. Padley, J.-M. Poutissou, R. Poutissou, G. Redlinger, P. Kitching, and R. Soluk

Subjects
Physics, Antiparticle, Particle decay, Particle physics, Pion, Meson, Branching fraction, Hadron, General Physics and Astronomy, Neutrino, Lepton
Abstract

A search for additional evidence for the rare kaon decay K+-->pi(+)nunu; has been made with a new data set comparable in sensitivity to the previous exposure that produced a single event. No new events were found in the pion momentum region examined, 211 pi(+)nunu;) = 1.5(+3.4)(-1.2)x10(-10).

Published
2000

21. Measurement of the Ratio of theνμCharged-Current Single-Pion Production to Quasielastic Scattering with a 0.8 GeV Neutrino Beam on Mineral Oil

Author

A. A. Aguilar-Arevalo, C. E. Anderson, A. O. Bazarko, S. J. Brice, B. C. Brown, L. Bugel, J. Cao, L. Coney, J. M. Conrad, D. C. Cox, A. Curioni, Z. Djurcic, D. A. Finley, B. T. Fleming, R. Ford, F. G. Garcia, G. T. Garvey, C. Green, J. A. Green, T. L. Hart, E. Hawker, R. Imlay, R. A. Johnson, G. Karagiorgi, P. Kasper, T. Katori, T. Kobilarcik, I. Kourbanis, S. Koutsoliotas, E. M. Laird, S. K. Linden, J. M. Link, Y. Liu, W. C. Louis, K. B. M. Mahn, W. Marsh, V. T. McGary, G. McGregor, W. Metcalf, P. D. Meyers, F. Mills, G. B. Mills, J. Monroe, C. D. Moore, R. H. Nelson, P. Nienaber, J. A. Nowak, B. Osmanov, S. Ouedraogo, R. B. Patterson, D. Perevalov, C. C. Polly, E. Prebys, J. L. Raaf, H. Ray, B. P. Roe, A. D. Russell, V. Sandberg, R. Schirato, D. Schmitz, M. H. Shaevitz, F. C. Shoemaker, D. Smith, M. Soderberg, M. Sorel, P. Spentzouris, J. Spitz, I. Stancu, R. J. Stefanski, M. Sung, H. A. Tanaka, R. Tayloe, M. Tzanov, R. Van de Water, M. O. Wascko, D. H. White, M. J. Wilking, H. J. Yang, G. P. Zeller, and E. D. Zimmerman

Subjects
Nuclear physics, Physics, MiniBooNE, Particle physics, Muon, Pion, Hadron, General Physics and Astronomy, High Energy Physics::Experiment, Neutrino, Energy source, Charged current, Lepton
Abstract

Charged current single pion production (CC{pi}{sup +}) and charged current quasi-elastic scattering (CCQE) are the most abundant interaction types for neutrinos at energies around 1 GeV, a region of great interest to oscillation experiments. The cross-sections for these processes, however, are not well understood in this energy range. This dissertation presents a measurement of the ratio of CC{pi}{sup +} to CCQE cross-sections for muon neutrinos on mineral oil (CH{sub 2}) in the MiniBooNE experiment. The measurement is presented here both with and without corrections for hadronic re-interactions in the target nucleus and is given as a function of neutrino energy in the range 0.4 GeV < E{sub {nu}} < 2.4 GeV. With more than 46,000 CC{pi}{sup +} events collected in MiniBooNE, and with a fractional uncertainty of roughly 11% in the region of highest statistics, this measurement represents a dramatic improvement in statistics and precision over previous CC{pi}{sup +} and CCQE measurements.

Published
2009

22. Measurement ofνμandνeEvents in an Off-Axis Horn-Focused Neutrino Beam

Author

P. D. Meyers, B. P. Roe, Jocelyn Monroe, I. Kourbanis, A. O. Bazarko, T. Kobilarcik, V. D. Sandberg, Alexis A. Aguilar-Arevalo, Z. Pavlovic, J. M. Link, D. A. Finley, Janet Conrad, D. C. Cox, D. H. White, B. Viren, P. H. Kasper, G. McGregor, M. Sorel, G. Karagiorgi, C. D. Moore, R. Ford, J. A. Green, Brajesh C Choudhary, D. Perevalov, C. Green, P. Nienaber, J. L. Raaf, E. M. Laird, H. A. Tanaka, J. Hylen, S. J. Brice, L. Loiacono, J. K. Nelson, R. B. Patterson, H. R. Gallagher, I. Stancu, F. Mills, C. E. Anderson, Kendall Mahn, G. P. Zeller, D. A. Harris, R. A. Johnson, E. Hawker, W. Metcalf, M. Tzanov, F. G. Garcia, M. J. Wilking, R. Imlay, M. O. Wascko, D. W. Schmitz, C. C. Polly, Panagiotis Spentzouris, R. Zwaska, T. L. Hart, R. H. Nelson, R. J. Stefanski, W. Marsh, M. H. Shaevitz, S. Koutsoliotas, A. Marchionni, A. Curioni, P. Adamson, E. D. Zimmerman, M. Sodeberg, Z. Djurcic, Y. L. Liu, Francisco Yumiceva, P. Vahle, M. Sung, W. C. Louis, M. D. Messier, H. Ray, S. Ouedraogo, R. G. Van de Water, Teppei Katori, J. A. Nowak, H. J. Yang, V. T. Nguyen, David Smith, L. Bugel, B. C. Brown, Jun Cao, M. Bishai, G. B. Mills, Rex Tayloe, Sacha E Kopp, F. C. Shoemaker, R. Schirato, G. T. Garvey, B. T. Fleming, S. K. Linden, W. Smart, A. D. Russell, E.J. Prebys, and L. Coney

Subjects
Physics, Particle physics, Physics::Instrumentation and Detectors, General Physics and Astronomy, NuMI, Nuclear physics, MiniBooNE, Pion, Beamline, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Neutrino, Beam (structure), Charged current
Abstract

We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beam line at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle (6.3°) with respect to the NuMI beam axis. Samples of charged-current quasielastic νμ and νe interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam.

Published
2009

23. Neutrino flux prediction at MiniBooNE

Author

S. Koutsoliotas, P. S. Martin, V. T. Nguyen, Janet Conrad, G. P. Zeller, I. Stancu, D. C. Cox, Panagiotis Spentzouris, G. Karagiorgi, P. Nienaber, D. H. White, V. D. Sandberg, G. McGregor, R. J. Stefanski, D. Perevalov, L. Coney, A. O. Bazarko, R. Ford, A. D. Russell, J. M. Link, C. Green, W. Metcalf, B. T. Fleming, J. L. Raaf, H. J. Yang, M. Sorel, F. Mills, R. H. Nelson, T. L. Hart, Rex Tayloe, Kendall Mahn, E. M. Laird, M. H. Shaevitz, Z. Djurcic, R. B. Patterson, S. K. Linden, E. Hawker, C. C. Polly, W. Marsh, H. Ray, M. Soderberg, D. A. Finley, R. G. Van de Water, D. W. Schmitz, E.J. Prebys, J. A. Nowak, J. A. Green, B. P. Roe, I. Kourbanis, W. C. Louis, Teppei Katori, M. O. Wascko, David Smith, L. Bugel, C. D. Moore, T. Kobilarcik, H. A. Tanaka, B. C. Brown, R. A. Johnson, Alexis A. Aguilar-Arevalo, S. J. Brice, Jun Cao, P. D. Meyers, Jocelyn Monroe, G. B. Mills, F. C. Shoemaker, A. Curioni, M. Sung, G. T. Garvey, S. Ouedraogo, R. Schirato, M. J. Wilking, C. E. Anderson, M. Tzanov, F. G. Garcia, E. D. Zimmerman, Y. L. Liu, P. H. Kasper, and R. Imlay

Subjects
Physics, Research Groups and Centres\Physics\Low Temperature Physics, Nuclear and High Energy Physics, Particle physics, Meson, Faculty of Science\Physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, High Energy Physics - Experiment, Massless particle, MiniBooNE, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Neutrino, Nuclear Experiment, Neutrino oscillation, Lepton
Abstract

The booster neutrino experiment (MiniBooNE) searches for nu(mu)->nu(e) oscillations using the O(1 GeV) neutrino beam produced by the booster synchrotron at the Fermi National Accelerator Laboratory). The booster delivers protons with 8 GeV kinetic energy (8.89 GeV/c momentum) to a beryllium target, producing neutrinos from the decay of secondary particles in the beam line. We describe the Monte Carlo simulation methods used to estimate the flux of neutrinos from the beam line incident on the MiniBooNE detector for both polarities of the focusing horn. The simulation uses the Geant4 framework for propagating particles, accounting for electromagnetic processes and hadronic interactions in the beam line materials, as well as the decay of particles. The absolute double differential cross sections of pion and kaon production in the simulation have been tuned to match external measurements, as have the hadronic cross sections for nucleons and pions. The statistical precision of the flux predictions is enhanced through reweighting and resampling techniques. Systematic errors in the flux estimation have been determined by varying parameters within their uncertainties, accounting for correlations where appropriate., The MiniBooNE collaboration acknowledges support from the Department of Energy and the National Science Foundation of the United States. We are grateful to Fermilab for hosting the experiment and thank the Accelerator Division for the excellent accelerator performance. We thank Los Alamos National Laboratory for LDRD funding. We acknowledge Bartoszek Engineering for the design of the focusing horn. This research was done using resources provided by the Open Science Grid, which is supported by the NSF and DOE-SC. We also acknowledge the use of the LANL PINK cluster and CONDOR software in the analysis of the data.

Published
2009

24. Unexplained Excess of Electronlike Events from a 1-GeV Neutrino Beam

Author

Y. Liu, D. H. White, G. Karagiorgi, R. H. Nelson, M. J. Wilking, W. Marsh, D. W. Schmitz, C.D. Moore, D. C. Cox, Daniel Finley, R. B. Patterson, Michael H. Shaevitz, Peter Daniel Meyers, G. McGregor, T. Kobilarcik, G. B. Mills, D. Perevalov, B. P. Roe, C. C. Polly, G. P. Zeller, V. T. Nguyen, Haijun Yang, P. Nienaber, R. Imlay, Teppei Katori, S. J. Brice, R. Ford, C. Green, David Smith, I. Kourbanis, H. A. Tanaka, M. O. Wascko, L. Bugel, R. Tayloe, J. A. Green, B. C. Brown, I. Stancu, E. D. Zimmerman, F. C. Shoemaker, Kendall Mahn, A. D. Russell, C. E. Anderson, Janet Conrad, J. L. Raaf, M. Tzanov, F. G. Garcia, R. Schirato, B. T. Fleming, S. K. Linden, R. J. Stefanski, V. D. Sandberg, Alexis A. Aguilar-Arevalo, E.J. Prebys, F. Mills, R. A. Johnson, Jun Cao, M. Sodeberg, M. Sung, Z. Djurcic, G. T. Garvey, T. L. Hart, S. Ouedraogo, M. Sorel, S. Koutsoliotas, E. Laird, A. O. Bazarko, P. H. Kasper, J. M. Link, P. Spentzouris, William C. Louis, E. Hawker, H. Ray, R. G. Van de Water, J. A. Nowak, W. Metcalf, Jocelyn Monroe, A. Curioni, and L. Coney

Subjects
Physics, Particle physics, Scattering, Hadron, Astrophysics (astro-ph), General Physics and Astronomy, FOS: Physical sciences, Astrophysics, High Energy Physics - Experiment, Nuclear physics, MiniBooNE, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Neutrino, Nucleon, Neutrino oscillation, Energy (signal processing), Lepton
Abstract

The MiniBooNE Collaboration observes unexplained electronlike events in the reconstructed neutrino energy range from 200 to 475 MeV. With 6.46 x 10(20) protons on target, 544 electronlike events are observed in this energy range, compared to an expectation of 415.2 +/- 43.4 events, corresponding to an excess of 128.8 +/- 20.4 +/- 38.3 events. The shape of the excess in several kinematic variables is consistent with being due to either nu(e) and (nu) over bar (e) charged-current scattering or nu(mu) neutral-current scattering with a photon in the final state. No significant excess of events is observed in the reconstructed neutrino energy range from 475 to 1250 MeV, where 408 events are observed compared to an expectation of 385.9 +/- 35.7 events., We acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation, and we acknowledge Los Alamos National Laboratory for LDRD funding. In addition, we acknowledge theoretical input from Tina Leitner and Ulrich Mosel on the Delta -> N gamma background.

Published
2009

25. Search for Muon Neutrino and Antineutrino Disappearance in MiniBooNE

Author

E. Hawker, W. Metcalf, R. Imlay, R. B. Patterson, H. Ray, M. J. Wilking, R. G. Van de Water, Y. Liu, M. O. Wascko, G. Karagiorgi, J. A. Nowak, I. Stancu, T. Kobilarcik, D. Perevalov, Jun Cao, S. Koutsoliotas, D. W. Schmitz, C. E. Anderson, B. P. Roe, G. P. Zeller, M. Tzanov, F. G. Garcia, F. Mills, B. Osmanov, I. Kourbanis, A. O. Bazarko, Peter Daniel Meyers, A. D. Russell, R. Schirato, P. H. Kasper, E. Laird, Z. Djurcic, Z. Pavlovic, S. J. Brice, H. A. Tanaka, J. A. Green, J. Mousseau, William C. Louis, J. L. Raaf, Jocelyn Monroe, David Smith, L. Bugel, Haijun Yang, V. D. Sandberg, E. D. Zimmerman, Alexis A. Aguilar-Arevalo, R. Tayloe, Janet Conrad, R. A. Johnson, R. Ford, B. C. Brown, C. Green, R. J. Stefanski, J. Grange, M. Sung, G. T. Garvey, Jonathan M. Link, Kendall Mahn, C.D. Moore, D. C. Cox, B. T. Fleming, G. McGregor, S. Ouedraogo, S. K. Linden, G. B. Mills, W. Marsh, T. L. Hart, E.J. Prebys, Daniel Finley, R. H. Nelson, P. Spentzouris, Teppei Katori, M. Sorel, A. Curioni, F. C. Shoemaker, J. Spitz, Michael H. Shaevitz, L. Coney, P. Nienaber, M. Soderberg, C. Mauger, D. H. White, C. C. Polly, and V. T. McGary

Subjects
Physics, Antiparticle, Particle physics, General Physics and Astronomy, FOS: Physical sciences, Elementary particle, High Energy Physics - Experiment, MiniBooNE, Massless particle, Nuclear physics, High Energy Physics - Experiment (hep-ex), Antimatter, Neutrino, Energy (signal processing), Lepton
Abstract

The MiniBooNE Collaboration reports a search for nu(mu) and nu(mu) disappearance in the Delta m(2) region of 0.5-40 eV(2). These measurements are important for constraining models with extra types of neutrinos, extra dimensions, and CPT violation. Fits to the shape of the nu(mu) and nu(mu) energy spectra reveal no evidence for disappearance at the 90% confidence level (C.L.) in either mode. The test of nu(mu) disappearance probes a region below Delta m(2)=40 eV(2) never explored before., We acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation. We thank Los Alamos National Laboratory for LDRD funding. We also acknowledge the use of Condor software in the analysis the data.

Published
2009

26. Higher-twist effects in the reactionπ−N→μ+μ−Xat 253 GeV/c

Author

S. Palestini, F. C. Shoemaker, A. J.S. Smith, J. Conway, J. E. Pilcher, E. I. Rosenberg, D. P. Russell, C. E. Adolphsen, A. Possoz, J. G. Heinrich, W. C. Louis, K. T. McDonald, J. P. Alexander, J. F. Greenhalgh, C. Biino, and K. J. Anderson

Subjects
Physics, Antiparticle, Particle physics, Muon, Pion, Meson, Hadron, High Energy Physics::Experiment, Elementary particle, Twist, Nucleon
Abstract

The distributions of quarks in the pion and nucleon are extracted from measurements of the reaction ${\ensuremath{\pi}}^{\ensuremath{-}}N\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}X$ at 253 GeV/c in a naive Drell-Yan analysis, as well as QCD-corrected analyses at leading-log and next-to-leading-log order. As ${x}_{\ensuremath{\pi}}\ensuremath{\rightarrow}1$ the pion structure function shows a term that varies as $\frac{1}{{m}_{\ensuremath{\mu}\ensuremath{\mu}}^{4}}$, which we interpret as a higher-twist effect. Additionally, the angular distribution of the ${\ensuremath{\mu}}^{+}$ in the muon-pair rest frame tends towards ${sin}^{2}\ensuremath{\theta}$ as ${x}_{\ensuremath{\pi}}\ensuremath{\rightarrow}1$ and as ${m}_{\ensuremath{\mu}\ensuremath{\mu}}\ensuremath{\rightarrow}0$ in a manner consistent with higher-twist effects. When the strongly mass-dependent higher-twist effects are included as part of the pion structure function, the nucleon structure function agrees well with leading-twist results from deeply inelastic lepton-hadron scattering. A significant advance of the present work is the extension of the analysis to low masses by the subtraction of the $\frac{J}{\ensuremath{\psi}}$ and ${\ensuremath{\psi}}^{\ensuremath{'}}$ resonances from the continuum. Our analysis covers the kinematic range $0.4l{x}_{\ensuremath{\pi}}l1.0$ and $0.02l{x}_{N}l0.33$ with $3.0l{m}_{\ensuremath{\mu}\ensuremath{\mu}}l8.55$ GeV/${\mathit{c}}^{2}$. Cross sections for ${\ensuremath{\psi}}^{\ensuremath{'}}$ production are presented in an appendix.

Published
1991

27. A search for and other rare K+ decays

Author

J. S. Frank, Y. Kuno, J. S. Haggerty, L. Felawka, J. Roy, A. J.S. Smith, W. C. Louis, J. M. Poutissou, Georges Azuelos, P. Kitching, T. Numao, L. S. Littenberg, D. S. Akerib, R. C. Strand, J. A. Macdonald, T. F. Kycia, K. K. Li, F. C. Shoemaker, M. M. Ito, Douglas Bryman, Mats A Selen, Ewart W. Blackmore, I. H. Chiang, Peter Daniel Meyers, M. S. Atiya, B. P. Padley, A. J. Stevens, Daniel Robert Marlow, and R. Poutissou

Subjects
Physics, Nuclear and High Energy Physics, Particle physics
Published
1991

28. Upper limit on the branching ratio for the decayπ0→νν¯

Author

Daniel Robert Marlow, Georges Azuelos, Ewart W. Blackmore, R. C. Strand, T. Numao, W. C. Louis, L. S. Littenberg, Mats A Selen, J. Roy, I. H. Chiang, A. J. Stevens, T. F. Kycia, D. S. Akerib, Y. Kuno, R. Poutissou, Peter Daniel Meyers, L. Felawka, K. K. Li, Douglas Bryman, J. S. Frank, J. A. Macdonald, J. S. Haggerty, P. Padley, A. J.S. Smith, M. S. Atiya, P. Kitching, F. C. Shoemaker, J. M. Poutissou, and M. M. Ito

Subjects
Physics, Particle decay, Antiparticle, Pion, Meson, Branching fraction, General Physics and Astronomy, High Energy Physics::Experiment, Atomic physics, Weak interaction, Energy (signal processing), Lepton
Abstract

An experimental upper limit on the branching ratio for the decay {pi}{sup 0}{r arrow}{nu}{bar {nu}} is set at 8.3{times}10{sup {minus}7} (90% C.L.). This decay is forbidden if neutrinos are purely left handed. The limit also applies to any decays of the {pi}{sup 0} to weakly interacting neutrals.

Published
1991

29. Measurement of numicro and nue events in an off-axis horn-focused neutrino beam

Author

P, Adamson, A A, Aguilar-Arevalo, C E, Anderson, A O, Bazarko, M, Bishai, S J, Brice, B C, Brown, L, Bugel, J, Cao, B C, Choudhary, L, Coney, J M, Conrad, D C, Cox, A, Curioni, Z, Djurcic, D A, Finley, B T, Fleming, R, Ford, H R, Gallagher, F G, Garcia, G T, Garvey, C, Green, J A, Green, D, Harris, T L, Hart, E, Hawker, J, Hylen, R, Imlay, R A, Johnson, G, Karagiorgi, P, Kasper, T, Katori, T, Kobilarcik, S, Kopp, I, Kourbanis, S, Koutsoliotas, E M, Laird, S K, Linden, J M, Link, Y, Liu, L, Loiacono, W C, Louis, A, Marchionni, K B M, Mahn, W, Marsh, G, McGregor, M D, Messier, W, Metcalf, P D, Meyers, F, Mills, G B, Mills, J, Monroe, C D, Moore, J K, Nelson, R H, Nelson, V T, Nguyen, P, Nienaber, J A, Nowak, S, Ouedraogo, R B, Patterson, Z, Pavlovic, D, Perevalov, C C, Polly, E, Prebys, J L, Raaf, H, Ray, B P, Roe, A D, Russell, V, Sandberg, R, Schirato, D, Schmitz, M H, Shaevitz, F C, Shoemaker, W, Smart, D, Smith, M, Sodeberg, M, Sorel, P, Spentzouris, I, Stancu, R J, Stefanski, M, Sung, H A, Tanaka, R, Tayloe, M, Tzanov, P, Vahle, R, Van de Water, B, Viren, M O, Wascko, D H, White, M J, Wilking, H J, Yang, F X, Yumiceva, G P, Zeller, E D, Zimmerman, and R, Zwaska

Abstract

We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beam line at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle (6.3 degrees) with respect to the NuMI beam axis. Samples of charged-current quasielastic numicro and nue interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam.

Published
2008

30. Compatibility of high-Δm2νeandν¯eneutrino oscillation searches

Author

I. Stancu, G. P. Zeller, D. W. Schmitz, David Smith, L. Bugel, Jan Conrad, W. C. Louis, B. C. Brown, G. Karagiorgi, Jun Cao, C. C. Polly, G. B. Mills, P. Nienaber, D. C. Cox, I. Kourbanis, G. McGregor, W. Marsh, S. J. Brice, R. H. Nelson, T. L. Hart, A. O. Bazarko, M. H. Shaevitz, E. D. Zimmerman, R. Ford, P. D. Meyers, C. Green, D. A. Finley, M. Soderberg, S. Koutsoliotas, Y. L. Liu, Panagiotis Spentzouris, Teppei Katori, C. D. Moore, Rex Tayloe, J. A. Green, R. L. Imlay, V. T. Nguyen, D. Perevalov, J. L. Raaf, H. A. Tanaka, Z. Djurcic, H. J. Yang, T. Kobilarcik, P. H. Kasper, A. D. Russell, Kendall Mahn, P. Martin, R. A. Johnson, M. Sorel, C. E. Anderson, M. Tzanov, F. G. Garcia, E. Hawker, R. J. Stefanski, Alexis A. Aguilar-Arevalo, R. Schirato, G. T. Garvey, M. Sung, H. Ray, W. Metcalf, M. J. Wilking, R. G. Van de Water, S. Ouedraogo, F. C. Shoemaker, F. Mills, D. H. White, Jocelyn Monroe, R. B. Patterson, A. Curioni, M. O. Wascko, L. Coney, V. D. Sandberg, J. M. Link, B. P. Roe, E. M. Laird, B. T. Fleming, S. K. Linden, and E.J. Prebys

Subjects
Physics, Nuclear and High Energy Physics, Sterile neutrino, Particle physics, Liquid Scintillator Neutrino Detector, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, MiniBooNE, Measurements of neutrino speed, CP violation, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Lepton
Abstract

This article presents the compatibility of experimental data from neutrino oscillation experiments with a high-{delta}m{sup 2} two-neutrino oscillation hypothesis. Data is provided by the Bugey, Karlsruhe Rutherford Medium Energy Neutrino Experiment 2 (KARMEN2), Los Alamos Liquid Scintillator Neutrino Detector (LSND), and MiniBooNE experiments. The LSND, KARMEN2, and MiniBooNE results are 25.36% compatible within a two-neutrino oscillation hypothesis. However, the point of maximal compatibility is found in a region that is excluded by the Bugey data. A joint analysis of all four experiments, performed in the sin{sup 2}2{theta} vs {delta}m{sup 2} region common to all data, finds a maximal compatibility of 3.94%. This result does not account for additions to the neutrino oscillation model from sources such as CP violation or sterile neutrinos.

Published
2008

31. The MiniBooNE Detector

Author

David Smith, P. H. Kasper, L. Bugel, H. J. Yang, R. B. Patterson, B. C. Brown, M. O. Wascko, J. A. Green, E. Hawker, H. Ray, D. W. Schmitz, E. D. Zimmerman, W. R. Sands, R. G. Van de Water, J. L. Raaf, G. Karagiorgi, C. D. Moore, D. C. Cox, Y. L. Liu, D. Perevalov, P. Nienaber, H. A. Tanaka, G. McGregor, P. Martin, H. O. Meyer, D. H. White, Jun Cao, G. P. Zeller, J. A. Nowak, Kendall Mahn, B. T. Fleming, C. C. Polly, W. Marsh, E. M. Laird, G. B. Mills, A. Curioni, Peter Daniel Meyers, Z. Djurcic, R. Imlay, R. A. Johnson, B. P. Roe, L. Bartoszek, M. Sung, Janet Conrad, G. T. Garvey, M. Sorel, S. Ouedraogo, Teppei Katori, G. Schofield, R. J. Stefanski, V. D. Sandberg, R. Ford, I. Stancu, C. Green, C. E. Anderson, J. M. Link, M. Tzanov, M. J. Wilking, F. G. Garcia, Panagiotis Spentzouris, I. Kourbanis, D. A. Finley, T. L. Hart, W. Metcalf, M. H. Shaevitz, W. C. Louis, T. Kobilarcik, S. J. Brice, Jocelyn Monroe, R. Schirato, Rex Tayloe, A. D. Russell, Alexis A. Aguilar-Arevalo, F. C. Shoemaker, M. Soderberg, A. O. Bazarko, F. Mills, S. Koutsoliotas, S. K. Linden, V. T. Nguyen, E.J. Prebys, L. Coney, and R. H. Nelson

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Particle physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Parameter space, Physics::Data Analysis, Statistics and Probability, High Energy Physics - Experiment, MiniBooNE, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutrino detector, Calibration, High Energy Physics::Experiment, Neutrino oscillation, Instrumentation, Order of magnitude
Abstract

The MiniBooNE neutrino detector was designed and built to look for muon-neutrino to electron-neutrino oscillations in the mixing parameter space region where the LSND experiment reported a signal. The MiniBooNE experiment used a beam energy and baseline that were an order of magnitude larger than those of LSND so that the backgrounds and systematic errors would be completely different. This paper provides a detailed description of the design, function, and performance of the MiniBooNE detector., 46 pages, 21 figures

Published
2008

32. Measurement of theK+→π+νν¯branching ratio

Author

V. Obraztsov, M. M. Khabibullin, M. Ardebili, A. V. Artamonov, T. Numao, A. Konaka, S. S. Adler, P. S. Cooper, A. Kushnirenko, I. H. Chiang, Song Chen, S. H. Kettell, James Frank, A. O. Bazarko, M. Kuriki, K. Omata, J. A. Macdonald, B. Bassalleck, M. S. Atiya, T. Sekiguchi, J. Mildenberger, R. C. Strand, A. P. Kozhevnikov, T. K. Komatsubara, T. Sato, Ewart W. Blackmore, O. V. Mineev, M. Aoki, M. R. Convery, Masaharu Nomachi, P. D. Meyers, D. E. Jaffe, Y. Yoshimura, Yoichi Tamagawa, B. Viren, T. Shinkawa, Norihito Muramatsu, K. Mizouchi, M. Kazumori, George Redlinger, P. Kitching, B. Bhuyan, L. S. Littenberg, F. C. Shoemaker, M. Miyajima, Tamaki Yoshioka, J. R. Stone, V. A. Mukhin, J. Hu, Masaaki Kobayashi, N. V. Yershov, B. Lewis, T. Nakano, S. V. Petrenko, K. K. Li, A. N. Khotjantsev, Douglas Bryman, Y. Kuno, A. P. Ivashkin, Takashi Nomura, Daniel Robert Marlow, T. Fujiwara, S. Kabe, R. Poutissou, E. J. Ramberg, M. M. Ito, T. Tsunemi, D. I. Patalakha, S. Sugimoto, V. V. Anisimovsky, D. V. Vavilov, R. A. McPherson, I. A. Christidi, L. G. Landsberg, R. Tschirhart, J. S. Haggerty, A. J.S. Smith, T. Inagaki, M. V. Diwan, and Yu. G. Kudenko

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Particle decay, Crystallography, Pion, Meson, Branching fraction, Hadron, Elementary particle, Lepton, Dimensionless quantity
Abstract

Experiment E949 at Brookhaven National Laboratory studied the rare decay K{sup +}-->pi{sup +} nu{ovr {nu}} and other processes with an exposure of 1.77 x 10{sup 12} k{sup +}'s. The data were analyzed using a blind analysis technique yielding one candidate event with an estimated background of 0.30 {+-} 0.03 events. Combining this result with the observation of two candidate events by the predecessor experiment E787 gave the branching ratio B(K{sup +}-->pi{sup +} nu{ovr {nu}}) = (1.47{sub -0.89}{sup +1.30}) x 10{sup -10}, consistent with the standard model prediction of (0.74 {+-} 0.20) x 10{sup -10}. This is a more detailed report of results previously published [V.V. Anisimovsky et al., Phys. Rev. Lett. 93, 031801 (2004)].

Published
2008

33. Search for the decayK+→π+γγ

Author

T. F. Kycia, I. H. Chiang, Ewart W. Blackmore, Daniel Robert Marlow, T. Numao, Georges Azuelos, Peter Daniel Meyers, W. C. Louis, M. S. Atiya, Y. Kuno, R. C. Strand, K. K. Li, A. J. Stevens, Douglas Bryman, M. M. Ito, R. Poutissou, P. Padley, J. S. Haggerty, Mats A Selen, A. J.S. Smith, J. M. Poutissou, J. S. Frank, J. A. Macdonald, J. Roy, F. C. Shoemaker, P. Kitching, L. S. Littenberg, L. Felawka, and D. S. Akerib

Subjects
Nuclear physics, Physics, Energy distribution, Phase space, Energy spectrum, Pi, General Physics and Astronomy, Scalar boson, Neutral particle, Kinetic energy, Gamma gamma
Published
1990

34. Search for the decayK+→π+νν¯

Author

J. S. Haggerty, A. J.S. Smith, R. Poutissou, Ewart W. Blackmore, P. Padley, W. C. Louis, Selen, F. C. Shoemaker, T. Numao, Georges Azuelos, A. Stevens, J. A. Macdonald, Daniel Robert Marlow, Atiya, J. M. Poutissou, M. M. Ito, L. Felawka, P. Kitching, T. F. Kycia, James Frank, R. C. Strand, P. D. Meyers, L. S. Littenberg, D. S. Akerib, I-Hung Chiang, Y. Kuno, J. Roy, K. K. Li, and Douglas Bryman

Subjects
Semileptonic decay, Physics, Particle physics, Crystallography, Particle decay, Pion, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, General Physics and Astronomy, Elementary particle, Particle identification
Abstract

An upper limit on the branching ratio for the decay {ital K}{sup +}{r arrow}{pi}{sup +}{nu}{bar {nu}} is set at 3.4{times}10{sup {minus}8} (90% C.L.). In addition, a 90%-C.L. upper limit of 6.4{times}10{sup {minus}9} is set on the branching ratio for decays of the form {ital K}{sup +}{r arrow}{pi}{sup +}{ital X}{sup 0}, where {ital X}{sup 0} is any massless, weakly interacting neutral particle. Limits are also set for the case where {ital M}{sub {ital X}{sup 0}}{gt}0.

Published
1990

35. Search for Electron Neutrino Appearance at theΔm2∼1 eV2Scale

Author

G. P. Zeller, C. D. Moore, H. A. Tanaka, E. M. Laird, P. H. Kasper, E. D. Zimmerman, R. L. Imlay, P. Nienaber, Y. L. Liu, P. Martin, M. Tzanov, D. C. Cox, G. McGregor, J. A. Green, F. G. Garcia, E. Hawker, D. W. Schmitz, D. Perevalov, J. L. Raaf, S. J. Brice, Jan Conrad, I. Stancu, R. H. Nelson, R. A. Johnson, B. T. Fleming, Kendall Mahn, F. C. Shoemaker, E.J. Prebys, C. C. Polly, W. Marsh, A. O. Bazarko, F. Mills, T. L. Hart, S. Koutsoliotas, David Smith, L. Bugel, I. Kourbanis, Panagiotis Spentzouris, M. H. Shaevitz, B. C. Brown, D. A. Finley, Teppei Katori, R. Ford, C. Green, Jun Cao, R. J. Stefanski, Rex Tayloe, T. Kobilarcik, M. J. Wilking, G. B. Mills, Z. Djurcic, M. Sung, S. Ouedraogo, A. Curioni, B. P. Roe, W. C. Louis, L. Coney, V. D. Sandberg, J. M. Link, P. D. Meyers, R. Schirato, G. T. Garvey, H. J. Yang, M. Sorel, H. Ray, R. G. Van de Water, W. Metcalf, Jocelyn Monroe, A. D. Russell, D. H. White, R. B. Patterson, M. O. Wascko, and Alexis A. Aguilar-Arevalo

Subjects
Physics, Nuclear physics, MiniBooNE, Particle physics, Neutrino detector, Solar neutrino, General Physics and Astronomy, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Solar neutrino problem, Neutrino oscillation, Lepton
Abstract

The MiniBooNE Collaboration reports first results of a search for {nu}{sub e} appearance in a {nu}{sub {mu}} beam. With two largely independent analyses, we observe no significant excess of events above the background for reconstructed neutrino energies above 475 MeV. The data are consistent with no oscillations within a two-neutrino appearance-only oscillation model.

Published
2007

36. Measurement of Muon Neutrino Quasi-Elastic Scattering on Carbon

Author

A. A. Aguilar-Arevalo, A. O. Bazarko, S. J. Brice, B. C. Brown, L. Bugel, J. Cao, L. Coney, J. M. Conrad, D. C. Cox, A. Curioni, Z. Djurcic, D. A. Finley, B. T. Fleming, R. Ford, F. G. Garcia, G. T. Garvey, C. Green, J. A. Green, T. L. Hart, E. Hawker, R. Imlay, R. A. Johnson, P. Kasper, T. Katori, T. Kobilarcik, I. Kourbanis, S. Koutsoliotas, E. M. Laird, J. M. Link, Y. Liu, W. C. Louis, K. B. M. Mahn, W. Marsh, P. S. Martin, G. McGregor, W. Metcalf, P. D. Meyers, F. Mills, G. B. Mills, J. Monroe, C. D. Moore, R. H. Nelson, P. Nienaber, S. Ouedraogo, R. B. Patterson, D. Perevalov, C. C. Polly, E. Prebys, J. L. Raaf, H. Ray, B. P. Roe, A. D. Russell, V. Sandberg, R. Schirato, D. Schmitz, M. H. Shaevitz, F. C. Shoemaker, D. Smith, M. Sorel, P. Spentzouris, I. Stancu, R. J. Stefanski, M. Sung, H. A. Tanaka, R. Tayloe, M. Tzanov, R. Van de Water, M. O. Wascko, D. H. White, M. J. Wilking, H. J. Yang, G. P. Zeller, and E. D. Zimmerman

Subjects
Physics, Particle physics, General Physics and Astronomy, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear physics, MiniBooNE, High Energy Physics - Experiment (hep-ex), Muon neutrino, High Energy Physics::Experiment, Fermilab, Neutrino, Nuclear Experiment (nucl-ex), Nucleon, Neutrino oscillation, Nuclear Experiment, Charged current, Lepton
Abstract

The observation of neutrino oscillations is clear evidence for physics beyond the standard model. To make precise measurements of this phenomenon, neutrino oscillation experiments, including MiniBooNE, require an accurate description of neutrino charged current quasi-elastic (CCQE) cross sections to predict signal samples. Using a high-statistics sample of muon neutrino CCQE events, MiniBooNE finds that a simple Fermi gas model, with appropriate adjustments, accurately characterizes the CCQE events observed in a carbon-based detector. The extracted parameters include an effective axial mass, M_A^eff = 1.23+/-0.20 GeV, that describes the four-momentum dependence of the axial-vector form factor of the nucleon; and a Pauli-suppression parameter, kappa = 1.019+/-0.011. Such a modified Fermi gas model may also be used by future accelerator-based experiments measuring neutrino oscillations on nuclear targets., 5 pages, 3 figures

Published
2007

37. Search for electron neutrino appearance at the Delta m2 approximately 1 eV2 scale

Author

A A, Aguilar-Arevalo, A O, Bazarko, S J, Brice, B C, Brown, L, Bugel, J, Cao, L, Coney, J M, Conrad, D C, Cox, A, Curioni, Z, Djurcic, D A, Finley, B T, Fleming, R, Ford, F G, Garcia, G T, Garvey, C, Green, J A, Green, T L, Hart, E, Hawker, R, Imlay, R A, Johnson, P, Kasper, T, Katori, T, Kobilarcik, I, Kourbanis, S, Koutsoliotas, E M, Laird, J M, Link, Y, Liu, W C, Louis, K B M, Mahn, W, Marsh, P S, Martin, G, McGregor, W, Metcalf, P D, Meyers, F, Mills, G B, Mills, J, Monroe, C D, Moore, R H, Nelson, P, Nienaber, S, Ouedraogo, R B, Patterson, D, Perevalov, C C, Polly, E, Prebys, J L, Raaf, H, Ray, B P, Roe, A D, Russell, V, Sandberg, R, Schirato, D, Schmitz, M H, Shaevitz, F C, Shoemaker, D, Smith, M, Sorel, P, Spentzouris, I, Stancu, R J, Stefanski, M, Sung, H A, Tanaka, R, Tayloe, M, Tzanov, R, Van de Water, M O, Wascko, D H, White, M J, Wilking, H J, Yang, G P, Zeller, and E D, Zimmerman

Abstract

The MiniBooNE Collaboration reports first results of a search for nu e appearance in a nu mu beam. With two largely independent analyses, we observe no significant excess of events above the background for reconstructed neutrino energies above 475 MeV. The data are consistent with no oscillations within a two-neutrino appearance-only oscillation model.

Published
2007

38. Addendum to the MiniBooNE Run Plab. MinneBooNE Physics in 2006

Author

Rex Tayloe, S. McKinney, Jocelyn Monroe, T. Kobilarcik, S. Koutsoliotas, G. T. Garvey, P. Nienaber, R. H. Nelson, A. O. Bazarko, D. H. White, David J. Smith, C. Green, B. C. Brown, S. J. Brice, E.D. Zimmernan, D. C. Cox, G. McGregor, J. L. Raaf, R. B. Patterson, H. J. Yang, I. Stancu, G. P. Zeller, B. T. Fleming, M. Sorel, M. O. Wascko, W. Metcalf, Jun Cao, W. C. Louis, B. P. Roe, B. Sapp, Jan Conrad, W. Marsh, M. Sung, C. Bhat, M. J. Wilking, G. B. Mills, I. Kourbanis, Teppei Katori, H. O. Meyer, S. Ouedraogo, P. D. Meyers, R. J. Stefanski, A. D. Russell, D.W. Schmitz, E.J. Prebys, R. Schirato, E. Hawker, C. D. Moore, F. C. Shoemaker, Y. L. Liu, R. L. Imlay, N.L. Wallbridge, D. A. Finley, H. A. Tanaka, F. G. Garcia, T. L. Hart, Alexis A. Aguilar-Arevalo, V. D. Sandberg, J. M. Link, R. A. Johnson, M. H. Shaevitz, P. H. Kasper, L. Bugel, H. Ray, Andrew G. Green, R. G. Van de Water, Panagiotis Spentzouris, R. Ford, K.B. McConnel, and A. Curioni

Subjects
MiniBooNE, Fiscal year, Nuclear physics, Physics, Operations research, Addendum, Plan (drawing)
Abstract

The primary physics goal of Mini BooNE is to confirm or rule out the LSND vμ→ve oscilliation observation with high significance. In the 2003 Run Plan document presented to the PAC, we outlined the need for 1 X 1021 protons on target (POT) to achieve this goal. In this document, we present an addendum to our run plan for fiscal year 2006 (FY2006).

Published
2004

39. Further search for the decayK+→π+νν¯in the momentum regionP<195MeV/c

Author

Vivek Jain, L. S. Littenberg, P. Kitching, B. Bhuyan, P. C. Bergbusch, J. S. Frank, Yoshitaka Kuno, George Redlinger, S. Kabe, Ewart W. Blackmore, K. K. Li, C. Witzig, T. Numao, A. Konaka, T. F. Kycia, Douglas Bryman, R. A. McPherson, A. Otomo, M. Kuriki, J. A. Macdonald, J. S. Haggerty, M. Aoki, R. Soluk, M. V. Diwan, S. S. Adler, T. Sato, P. D. Meyers, J. R. Stone, S. Sugimoto, S. Ng, A. J.S. Smith, I. H. Chiang, J. Mildenberger, R. C. Strand, T. K. Komatsubara, S. H. Kettell, T. Sasaki, M. Kazumori, F. C. Shoemaker, T. Inagaki, C. Ng, M. Ardebili, J. M. Poutissou, Y. Yoshimura, A. O. Bazarko, N. Muramatsu, R. Poutissou, M. S. Atiya, Masaaki Kobayashi, D. E. Jaffe, M. M. Ito, M. R. Convery, Takashi Nakano, and T. Shinkawa

Subjects
Massless particle, Momentum, Physics, Nuclear and High Energy Physics, Branching fraction, Atomic physics
Abstract

We report the results of a search for the decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ in the kinematic region with ${\ensuremath{\pi}}^{+}$ momentum $140lPl195\mathrm{MeV}/c$ using the data collected by the E787 experiment at BNL. No events were observed. When combined with our previous search in this region, one candidate event with an expected background of $1.22\ifmmode\pm\else\textpm\fi{}0.24$ events results in a 90% C.L. upper limit of $2.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}$ on the branching ratio of ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}.$ We also report improved limits on the rates of ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{X}^{0}$ and ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{X}^{1}{X}^{2}$ where ${X}^{0}{,X}^{1}{,X}^{2}$ are hypothetical, massless, long-lived neutral particles.

Published
2004

40. Search for the rare decayK+→π+γ

Author

R. C. Strand, M. Ardebili, T. K. Komatsubara, M. Aoki, C. Ng, Yoshitaka Kuno, A. Konaka, P. C. Bergbusch, T. Numao, Vivek Jain, M. Kazumori, M. Kuriki, Peter Daniel Meyers, R. Poutissou, S. Sugimoto, M. Miyajima, T. Sato, P. Kitching, T. F. Kycia, F. C. Shoemaker, Y. Yoshimura, T. Shinkawa, T. Sasaki, J. R. Stone, J. M. Poutissou, E. W. Blackmore, J. S. Frank, L. S. Littenberg, George Redlinger, M. V. Diwan, M. S. Atiya, N. Muramatsu, A. Otomo, J. Mildenberger, I. H. Chiang, S. H. Kettell, R. A. McPherson, R. Soluk, J. S. Haggerty, S. S. Adler, K. K. Li, M. R. Convery, Douglas Bryman, J. A. Macdonald, Masaaki Kobayashi, A. O. Bazarko, T. Nakano, C. Witzig, T. Inagaki, J. Nishide, Y. Tamagawa, M. M. Ito, and S. Kabe

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, High Energy Physics::Experiment
Abstract

We have performed a search for the angular-momentum forbidden decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\gamma}$ with the E787 detector at BNL. No events were observed in the ${\ensuremath{\pi}}^{+}$ kinematic region around $227 \mathrm{MeV}/c.$ An upper limit on the branching ratio for the decay is determined to be $3.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ at $90%$ confidence level.

Published
2002

41. Further Evidence for the DecayK+→π+νν¯

Author

Vivek Jain, J. R. Stone, P. Kitching, Yoichi Tamagawa, G. Redlinger, J. Hu, M. Kuriki, J. Mildenberger, R. C. Strand, I. H. Chiang, Shaomin Chen, Y. Yoshimura, T. K. Komatsubara, S. H. Kettell, K. Shimada, S. Ng, S. S. Adler, J. S. Frank, J. S. Haggerty, Ewart W. Blackmore, P. C. Bergbusch, C. Witzig, T. Shinkawa, T. Shimoyama, M. Miyajima, K. K. Li, Takashi Nakano, Douglas Bryman, A. Konaka, T. Inagaki, T. Sato, M. V. Diwan, Motoki Kobayashi, A. O. Bazarko, S. Sugimoto, Y. Kuno, S. Kabe, T. Numao, J. A. Macdonald, F. C. Shoemaker, J. M. Poutissou, L. S. Littenberg, P. D. Meyers, Norihito Muramatsu, R. Poutissou, C. Ng, and M. M. Ito

Subjects
Physics, Particle physics, Pion, Branching fraction, Pi, General Physics and Astronomy, Sensitivity (control systems)
Abstract

Additional evidence for the rare kaon decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, $211lPl229\mathrm{MeV}/c$, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute $0.15\ifmmode\pm\else\textpm\fi{}0.05$ events. The branching ratio is $B({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}){\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.57}_{\ensuremath{-}0.82}^{+1.75}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$.

Published
2002

42. Further evidence for the decay K+ --pi+nu(nu)

Author

S, Adler, A O, Bazarko, P C, Bergbusch, E W, Blackmore, D A, Bryman, S, Chen, I-H, Chiang, M V, Diwan, J S, Frank, J S, Haggerty, J, Hu, T, Inagaki, M, Ito, V, Jain, S, Kabe, S H, Kettell, P, Kitching, M, Kobayashi, T K, Komatsubara, A, Konaka, Y, Kuno, M, Kuriki, K K, Li, L S, Littenberg, J A, Macdonald, P D, Meyers, J, Mildenberger, M, Miyajima, N, Muramatsu, T, Nakano, C, Ng, S, Ng, T, Numao, J-M, Poutissou, R, Poutissou, G, Redlinger, T, Sato, K, Shimada, T, Shimoyama, T, Shinkawa, F C, Shoemaker, J R, Stone, R C, Strand, S, Sugimoto, Y, Tamagawa, C, Witzig, and Y, Yoshimura

Abstract

Additional evidence for the rare kaon decay K+--pi+nu(nu) has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211P229 MeV/c, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute 0.15+/-0.05 events. The branching ratio is B(K+--pi+nu(nu)) = 1.57(+1.75)(-0.82)x10(-10).

Published
2001

43. Technical Design Report for the 8 GeV Beam

Author

G.J. VanDalen, M. H. Shaevitz, M. Sung, David Smith, A. Malensek, M. Sorel, W. Marsh, W. C. Louis, B. C. Brown, B. Sapp, R. L. Imlay, Panagiotis Spentzouris, A. O. Bazarko, T. Williams, R. A. Johnson, P. Nienaber, R. Schirato, G. T. Garvey, N. Suwonjandee, I. Kourbanis, D. H. White, Rex Tayloe, I. Stancu, T. Kobilarcik, C. Bhat, A. D. Russell, B. T. Fleming, P. H. Kasper, N. Wadia, S. J. Brice, J. Formagio, F. C. Shoemaker, S. Koutsoliotas, E.D. Zimmernan, E Church, F. G. Garcia, L. Bugel, A. Malik, P. Martin, C. D. Moore, R. Ford, V. D. Sandberg, J. L. Raaf, R. G. Van de Water, Jan Conrad, F. Mills, B. P. Roe, R. J. Stefanski, E. Hawker, P. D. Meyers, G. B. Mills, and W. Metcalf

Subjects
Physics, Optics, business.industry, business, Beam (structure), Technical design
Published
2001

44. Search for the decayK+→π+π0νν¯

Author

T. F. Kycia, J. A. Macdonald, P. D. Meyers, George Redlinger, I. H. Chiang, C. Witzig, F. C. Shoemaker, S. H. Kettell, M. V. Diwan, T. K. Komatsubara, J. R. Stone, T. Inagaki, C. Ng, J. M. Poutissou, P. C. Bergbusch, A. Konaka, T. Numao, Y. Kuno, M. Ardebili, J. S. Haggerty, T. Nakano, M. Kuriki, P. Kitching, L. S. Littenberg, T. Shinkawa, M. M. Ito, S. Kabe, S. S. Adler, Y. Yoshimura, S. Sugimoto, T. Sato, J. S. Frank, N. Muramatsu, M. Aoki, R. Poutissou, J. Mildenberger, R. Soluk, R. C. Strand, M. Kobayashi, E. W. Blackmore, M. R. Convery, K. K. Li, R. A. McPherson, Douglas Bryman, Y. Kishi, and M. S. Atiya

Subjects
Physics, Nuclear and High Energy Physics, Mathematical physics
Published
2001

45. Upper limit on the decayK+→e+νμ+μ−

Author

T. Numao, A. S. Turcot, J. A. Macdonald, S. S. Adler, Ewart W. Blackmore, P. D. Meyers, Y. Kuno, J. Roy, T. Nakano, L. Felawka, A. Sambamurti, F. C. Shoemaker, Mats A Selen, M. S. Atiya, Daniel Robert Marlow, J. S. Haggerty, J. S. Frank, M. Rozon, A. Stevens, J. M. Poutissou, A. Konaka, M. M. Ito, R. Soluk, L. S. Littenberg, I. H. Chiang, D. S. Akerib, P. Padley, C. Witzig, R. Poutissou, A. J.S. Smith, W. C. Louis, Robert McPherson, P. Kitching, M. E. Convery, K. K. Li, T. F. Kycia, Douglas Bryman, R. C. Strand, and M. Ardebili

Subjects
Physics, Nuclear and High Energy Physics, Chiral symmetry, Chiral perturbation theory, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Limit (mathematics), Atomic physics, Perturbation theory, Helicity, Standard Model
Abstract

An upper limit on the branching ratio for the decay K{sup +}{r_arrow}e{sup +}{nu}{mu}{sup +}{mu}{sup {minus}} is set at 5.0{times}10{sup {minus}7} at a 90{percent} confidence level, consistent with predictions from chiral perturbation theory. {copyright} {ital 1998} {ital The American Physical Society}

Published
1998

46. Recent results on rare K+ decays from BNL E787

Author

T. Numao, I. H. Chiang, K. K. Li, A. S. Turcot, T. F. Kycia, Douglas Bryman, Ewart W. Blackmore, F. C. Shoemaker, W. C. Louis, M. S. Atiya, M. M. Ito, Mats A Selen, P. Kitching, J. M. Poutissou, Daniel Robert Marlow, J. S. Haggerty, R. C. Strand, A. Konaka, J. S. Frank, R. Soluk, L. Felawka, A. J.S. Smith, R. Poutissou, L. S. Littenberg, D. S. Akerib, Y. Kuno, A. Sambamurti, Peter Daniel Meyers, J. Roy, J. A. Macdonald, A. J. Stevens, and P. Padley

Subjects
Physics, Nuclear physics, Particle decay, Particle physics, Upgrade, Branching fraction, National laboratory, Standard Model
Abstract

Experiment 787, now in progress at Brookhaven National Laboratory (BNL), is designed to measure the process K+→π+νν. A preliminary upper limit for this process was recently obtained Γ(K+→π+νν/Γ(K+→all)

Published
1992

47. A study of

Author

K. K. Li, Douglas Bryman, A. Stevens, T. F. Kycia, M. S. Atiya, F. C. Shoemaker, James Frank, R. Poutissou, Mats A Selen, T. Numao, J. S. Haggerty, P. Kitching, J. A. Macdonald, I-Hung Chiang, L. Felawka, Georges Azuelos, Y. Kuno, J. M. Poutissou, P. Padley, R. C. Strand, Daniel Robert Marlow, A. J.S. Smith, Ewart W. Blackmore, M. M. Ito, W. C. Louis, J. Roy, P. D. Meyers, L. S. Littenberg, and D. S. Akerib

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Detector, Statistical physics, Atomic and Molecular Physics, and Optics
Abstract

A description of the detector and of preliminary results of work in progress in its performance is presented here for an experiment to study the decay of K + → π + ν ν .

Published
1989

48. Search for a light Higgs boson in the decayK+→π+H, H→μ+μ−

Author

T. Numao, Mats A Selen, R. Poutissou, F. C. Shoemaker, R. C. Strand, J. M. Poutissou, Peter Daniel Meyers, I. H. Chiang, J. S. Frank, Y. Kuno, J. A. Macdonald, J. Roy, T. F. Kycia, M. S. Atiya, W. C. Louis, A. J. Stevens, Georges Azuelos, J. S. Haggerty, A. J.S. Smith, Daniel Robert Marlow, K. K. Li, Douglas Bryman, M. M. Ito, P. Padley, L. S. Littenberg, D. S. Akerib, Ewart W. Blackmore, P. Kitching, L. Felawka, and Michael Hildreth

Subjects
Physics, Particle decay, Particle physics, Crystallography, Pion, Muon, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Higgs boson, General Physics and Astronomy, Elementary particle
Abstract

An upper limit on the branching ratio of the decay {ital K}{sup +}{r arrow}{pi}{sup +}H, {ital H}{r arrow}{mu}{sup +}{mu}{sup {minus}} is set at 1.5{times}10{sup {minus}7} at the 90% confidence level, for a Higgs-boson mass in the interval 220{lt}{ital m}{sub {ital H}}{lt}320 MeV/{ital c}{sup 2}. In addition, 90%-confidence-level upper limits on the branching ratios of the decays {ital K}{sup +}{r arrow}{pi}{sup +}{mu}{sup +}{mu}{sup {minus}} and {ital K}{sup +}{r arrow}{mu}{sup +}{nu}{mu}{sup +}{mu}{sup {minus}} are set at 2.3{times}10{sup {minus}7} and 4.1{times}10{sup {minus}7}, respectively.

Published
1989

49. Measurement of the ratio of sea to valence quarks in the nucleon

Author

C. E. Adolphsen, F. C. Shoemaker, J. P. Alexander, J. Heinrich, K. T. McDonald, E. I. Rosenberg, J. Conway, J. F. Greenhalgh, W. C. Louis, A. Possoz, J. E. Pilcher, C. Biino, S. Palestini, K. J. Anderson, and A. J.S. Smith

Subjects
Baryon, Nuclear physics, Physics, Muon, Distribution function, Annihilation, Meson, Hadron, General Physics and Astronomy, Atomic physics, Nucleon, Quarkonium
Abstract

The ratio of sea to valence quarks for nucleons in tungsten has been measured for the fractional momentum range 0.04{lt}{ital x}{sub {ital N}}{lt}0.36. The determination is based on the relative production rate of muon pairs by {pi}{sup +} and {pi}{sup {minus}} beams on a tungsten target. The results provide the most accurate determination to date of this ratio in the region {ital x}{sub {ital N}}{lt}0.1 and {ital Q}{sup 2}{gt}20 GeV{sup 2}, and are in good agreement with earlier measurements.

Published
1989

50. Lower Limit on Neutral-Heavy-Muon Mass

Author

C.D. Moore, M. Strovink, R. E. Shafer, T. W. Markiewicz, W. H. Smith, K. J. Johnson, R. P. Johnson, F. C. Shoemaker, S. C. Loken, W. A. Wenzel, L. T. Kerth, Allan G Clark, P. Surko, George D Gollin, P. D. Meyers, and M. Mugge

Subjects
Physics, Particle physics, Muon, Physics::Instrumentation and Detectors, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, Elementary particle, Nuclear physics, Particle decay, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, Charged current, Lepton, Bar (unit)
Abstract

Analysis of 122 965 dimuon final states produced by 209-GeV muons in a magnetized iron calorimeter has set a lower limit on the mass of a neutral heavy muon ({bar M}{sup 0}). If the {bar M}{sup 0} is coupled with Fermi strength to a right-handed charged current and decays to {mu}{mu}{nu} with a 10% branching ratio, its mass exceeds 9 GeV/c{sup 2}.

Published
1981

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