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Your search keyword '"N. K. Terentyev"' showing total 13 results
Start Over Author "N. K. Terentyev" Publisher american physical society (aps)
13 results on '"N. K. Terentyev"'

1. Observation of the Cabibbo-Suppressed DecayΞc+→pK−π+

Author

S. Y. Jun, N. Akchurin, V. A. Andreev, A. G. Atamantchouk, M. Aykac, M. Y. Balatz, N. F. Bondar, A. Bravar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, A. G. Dolgolenko, D. Dreossi, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, S. Gerzon, I. Giller, V. L. Golovtsov, Y. M. Goncharenko, E. Gottschalk, P. Gouffon, O. A. Grachov, E. Gülmez, M. Iori, A. D. Kamenski, H. Kangling, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, K. Königsmann, I. Konorov, A. A. Kozhevnikov, A. G. Krivshich, H. Krüger, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, M. Luksys, T. Lungov, D. Magarrel, V. P. Maleev, D. Mao, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, S. L. McKenna, M. A. Moinester, V. V. Molchanov, A. Morelos, V. A. Mukhin, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, A. Ocherashvili, G. Oleynik, Y. Onel, E. Ozel, S. Ozkorucuklu, S. Patrichev, A. Penzo, S. I. Petrenko, P. Pogodin, B. Povh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, P. Schiavon, V. K. Semyatchkin, J. Simon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, K. Vorwalter, Z. Wenheng, J. You, L. Yunshan, M. Zhenlin, L. Zhigang, and R. Zukanovich Funchal

Subjects
Physics, Meson, 010308 nuclear & particles physics, Stereochemistry, Branching fraction, General Physics and Astronomy, 01 natural sciences, Xi baryon, Sigma baryon, Nuclear physics, Baryon, Charmed baryons, Particle decay, 0103 physical sciences, Pi, 010306 general physics
Abstract

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi(+)(c)-->pK(-)pi(+). We observe 150+/-22+/-5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Sigma(-) beam. The branching fractions of the decay relative to the Cabibbo-favored Xi(+)(c)-->Sigma+K-pi(+) and Xi(+)(c)-->Xi(-)pi(+)pi(+) are measured to be B(Xi(+)(c)-->pK(-)pi(+))/B(Xi(+)(c)-->Sigma+K-pi(+)) = 0.22+/-0. 06+/-0.03 and B(Xi(+)(c)-->pK(-)pi(+))/B(Xi(+)(c)-->Xi(-)pi(+)pi(+)) = 0.20+/-0.04+/-0.02, respectively.

Published
2000

2. ptandxFdependence of the polarization ofΣ+hyperons produced by 800 GeV/cprotons

Author

A. Morelos, I. F. Albuquerque, N. F. Bondar, R. Carrigan, D. Chen, P. S. Cooper, Dai Lisheng, A. S. Denisov, A. V. Dobrovolsky, T. Dubbs, A. M. F. Endler, C. O. Escobar, M. Foucher, V. L. Golovtsov, H. Gottschalk, P. Gouffon, V. T. Grachev, A. V. Khanzadeev, M. A. Kubantsev, N. P. Kuropatkin, J. Lach, null Lang Pengfei, V. N. Lebedenko, null Li Chengze, null Li Yunshan, M. Luksys, J. R. P. Mahon, E. McCliment, C. Newsom, M. C. Pommot Maia, V. M. Samsonov, V. A. Schegelsky, null Shi Huanzhang, V. J. Smith, Tang Fukun, N. K. Terentyev, S. Timm, I. I. Tkatch, L. N. Uvarov, A. A. Vorobyov, null Yan Jie, Zhao Wenheng, null Zheng Shuchen, and null Zhong Yuanyuan

Subjects
Physics, Nuclear physics, Hyperon, Sigma, Nuclear Experiment, Polarization (waves), Lambda
Abstract

We utilize the angle and momentum resolution of our apparatus to study the polarization of 375 GeV/c Sigma(+) hyperons produced by 800 GeV/c protons incident on a Cu target. By examining in detail two of our high statistics data samples, we find evidence for structure in the p(t) dependence of Sigma(+) polarization and are able to extract the x(F) dependence of the Sigma(+) polarization and compare it with x(F) behavior in the Lambda(0) and Xi(-) systems.

Published
1995

3. Measurement of the branching ratio and asymmetry parameter for theΣ+→pγ radiative decay

Author

Lang Pengfei, N. P. Kuropatkin, V. T. Grachev, Vincent J Smith, Shi Huanzhang, M. C. Pommot Maia, I. I. Tkatch, N. F. Bondar, A. Morelos, A. V. Dobrovolsky, M. A. Kubantsev, M. Luksys, Yan Jie, V.A. Schegelsky, T. Dubbs, V. L. Golovtsov, Zhao Wenheng, Zheng Shuchen, Alexei Khanzadeev, I. F. Albuquerque, Li Chengze, An.A. Vorobyov, A. S. Denisov, P. Gouffon, Carlos Escobar, E. McCliment, J. R. P. Mahon, M. Foucher, L. N. Uvarov, Dai Lisheng, R.A. Carrigan, P. S. Cooper, Tang Fukun, A. M. F. Endler, C. R. Newsom, H. Gottschalk, Li Yunshan, D Chen, N. K. Terentyev, S. Timm, J. Lach, Zhong Yuanyuan, V. M. Samsonov, and J. Langland

Subjects
Nuclear physics, Physics, Particle physics, Branching fraction, media_common.quotation_subject, Hyperon, Radiative decay, Sigma, High Energy Physics::Experiment, Asymmetry, media_common
Abstract

We have measured the branching ratio for the hyperon radiative decay ${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p\ensuremath{\gamma} using the Fermilab polarized charged hyperon beam. This measurement and our previously published result on the asymmetry parameter in the same decay are part of Fermilab experiment E761. We find B(${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p\ensuremath{\gamma})/B(${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p${\mathrm{\ensuremath{\pi}}}^{0}$) to be [2.32\ifmmode\pm\else\textpm\fi{}0.11(stat)\ifmmode\pm\else\textpm\fi{}0.10(syst)]\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$ with a sample of 31 901 events. The higher statistics and careful attention to systematic uncertainties make these significant improvements over previous measurements. We describe how our measurements were performed and briefly review the theoretical implications of these results.

Published
1995

4. Measurement of the branching ratio for theΞ−→Σ−γ radiative decay

Author

Yan Jie, Dai Lisheng, Shi Huanzhang, Lang Pengfei, D. Chen, M. C. Pommot Maia, A. V. Dobrovolsky, M. Luksys, J. R. P. Mahon, N. K. Terentyev, E. McCliment, Tang Fukun, A. M. F. Endler, H. Gottschalk, A. V. Khanzadeev, N. F. Bondar, V.A. Schegelsky, A. A. Vorobyov, Zhong Yuanyuan, P. S. Cooper, M. A. Kubantsev, M. Foucher, A. Morelos, J. Lach, P. Gouffon, A. S. Denisov, C. R. Newsom, I. F. Albuquerque, S. Timm, L. N. Uvarov, Zhao Wenheng, Li Yunshan, Zheng Shuchen, N. P. Kuropatkin, V. T. Grachev, Li Chengze, I. I. Tkatch, T. Dubbs, Carlos Escobar, R. Carrigan, Vincent J Smith, V. L. Golovtsov, and V. M. Samsonov

Subjects
Physics, Baryon, Particle physics, Particle decay, Branching fraction, Hadron, Hyperon, General Physics and Astronomy, Lambda, Xi baryon, Sigma baryon
Abstract

We have measured the branching ratio for the hyperon radiative decay [Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma] from a sample of 211[plus minus]33 events obtained in the polarized 375 GeV/[ital c] charged hyperon beam at Fermilab. We find [ital B]([Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma]/[Xi][sup [minus]][r arrow][Lambda][sup 0][pi][sup [minus]])=(1.22[plus minus]0.23[plus minus]0.06)[times]10[sup [minus]4] where the quoted errors are statistical and systematic, respectively. We have also obtained an indication that the sign of the asymmetry parameter of this decay is positive.

Published
1994

5. Measurement of the magnetic moments of theΣ+and Σ¯−hyperons

Author

N. P. Kuropatkin, V. T. Grachev, P. Gouffon, I. F. Albuquerque, M. Foucher, Lang Pengfei, Carlos Escobar, Tkatch, V. M. Samsonov, L. N. Uvarov, A. V. Dobrovolsky, Dai Lisheng, Li Chengze, Li Yunshan, E. McCliment, A. S. Denisov, M. Luksys, V.A. Schegelsky, N. K. Terentyev, P. S. Cooper, R.A. Carrigan, C. R. Newsom, S. Timm, A. Morelos, Zhong Yuanyuan, M. A. Kubantsev, N. F. Bondar, Shi Huanzhang, An.A. Vorobyov, T. Dubbs, J. Lach, Pommot Maia Mc, Tang Fukun, A. M. F. Endler, H. Gottschalk, Alexei Khanzadeev, D Chen, Zhao Wenheng, Zheng Shuchen, V. L. Golovtsov, Vincent J Smith, Yan Jie, and Mahon

Subjects
Baryon, Physics, Antiparticle, Proton, Magnetic moment, CPT symmetry, General Physics and Astronomy, Sigma, High Energy Physics::Experiment, Fermion, Statistical physics, Atomic physics, Sigma baryon
Abstract

We have measured the magnetic moments of the SIGMA+ and SIGMABAR- hyperons produced by 800-GeV protons incident on a Cu target. We determine the SIGMA+ magnetic moment to be (2.4613 +/- 0.0034 +/- 0.0040)mu(N) where the uncertainties are statistical and systematic, respectively. In this first measurement we determine the magnetic moment of the SIGMABAR- to be -(2.428 +/- 0.036 +/- 0.007)mu(N). The magnetic moments of the SIGMA+ and SIGMABAR- are consistent with each other in magnitude but opposite in sign as required by CPT invariance.

Published
1993

6. Polarization ofΣ+and Σ¯−hyperons produced by 800-GeV/cprotons

Author

P. Gouffon, M. Foucher, M. Luksys, V.A. Schegelsky, A. V. Dobrovolsky, Li Yunshan, Zhao Wenheng, Zheng Shuchen, I. I. Tkatch, Lang Pengfei, Yan Jie, Vincent J Smith, J. Lach, N. P. Kuropatkin, V. T. Grachev, J. R. P. Mahon, Tang Fukun, A. M. F. Endler, Dai Lisheng, H. Gottschalk, Shi Huanzhang, A. A. Vorobyov, N. K. Terentyev, A. V. Khanzadeev, M. A. Kubantsev, A. S. Denisov, V. M. Samsonov, E. McCliment, A. Morelos, S. Timm, R.A. Carrigan, Zhong Yuanyuan, D Chen, T. Dubbs, V. L. Golovtsov, I. F. Albuquerque, Li Chengze, L. N. Uvarov, M. C. Pommot Maia, N. F. Bondar, Carlos Escobar, P. S. Cooper, and C. R. Newsom

Subjects
Physics, Hyperon, General Physics and Astronomy, Sigma, High Energy Physics::Experiment, Elementary particle, Atomic physics, Nuclear Experiment, Polarization (waves), Sigma baryon
Abstract

We have measured the polarization of 375-GeV/c SIGMA+ and SIGMABAR- hyperons produced by 800-GeV/c protons incident on a Cu target. We find that the SIGMA+ polarization rises with increasing p(t) to a maximum of 16% at p(t) = 1.0 GeV/c and then decreases to 10% at p(t) = 1.8 GeV/c. We compare this SIGMA+ polarization with data at lower energies. The SIGMABAR- polarization has been measured for the first time. It has the same sign as the SIGMA+ but smaller magnitude in a similar kinematical region.

Published
1993

7. Measurement of the asymmetry parameter in the hyperon radiative decayΣ+→pγ

Author

A. V. Dobrovolsky, A. Morelos, Lang Pengfei, Tang Fukun, A. M. F. Endler, A. A. Vorobyov, H. Gottschalk, M. A. Kubantsev, Pommot Maia Mc, Lebedenko Vn, Goritchev Pa, Zhao Wenheng, Zheng Shuchen, I. F. Albuquerque, A. S. Denisov, E. McCliment, Li Yunshan, T. Dubbs, Carlos Escobar, N. K. Terentyev, R.A. Carrigan, L. N. Uvarov, M. Foucher, M. Luksys, Li Chengze, S. Timm, Tkatch, V. M. Samsonov, A. V. Khanzadeev, Kuropatkin Np, P. Gouffon, V. L. Golovtsov, J. Lach, N. F. Bondar, Zhong Yuanyuan, Mahon, V. T. Grachev, Shi Huanzhang, Vincent J Smith, D. Chen, Yan Jie, Dai Lisheng, P. S. Cooper, and C. R. Newsom

Subjects
Physics, Nuclear physics, Baryon, Particle physics, Particle decay, Hadron, Hyperon, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Fermion, Charged particle, Sigma baryon
Abstract

We have measured the asymmetry parameter (${\mathrm{\ensuremath{\alpha}}}_{\ensuremath{\gamma}}$) in the hyperon radiative decay ${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p\ensuremath{\gamma} with a sample of 34 754\ifmmode\pm\else\textpm\fi{}212 events obtained in a polarized charged hyperon beam experiment at Fermilab. We find ${\mathrm{\ensuremath{\alpha}}}_{\ensuremath{\gamma}}$=-0.720\ifmmode\pm\else\textpm\fi{}0.086\ifmmode\pm\else\textpm\fi{}0.045, where the quoted errors are statistical and systematic, respectively.

Published
1992

8. New upper limit for the branching ratio of theΩ−→Ξ−γ radiative decay

Author

T. Dubbs, Shi Huanzhang, D Chen, N. K. Terentyev, Tkatch, I. F. Albuquerque, E. McCliment, L. N. Uvarov, Lang Pengfei, P. Gouffon, R.A. Carrigan, Alexei Khanzadeev, J. Lach, A. S. Denisov, Zhao Wenheng, Tang Fukun, A. M. F. Endler, H. Gottschalk, Mcp Maia, Zheng Shuchen, M. Luksys, V.A. Schegelsky, A. V. Dobrovolsky, An.A. Vorobyov, Carlos Escobar, A. Morelos, N. F. Bondar, Mahon, M. A. Kubantsev, Dai Lisheng, V. L. Golovtsov, V. M. Samsonov, Li Chengze, Li Yunshan, M. Foucher, Vincent J Smith, Yan Jie, P. S. Cooper, C. R. Newsom, N. P. Kuropatkin, V. T. Grachev, Zhong Yuanyuan, and S. Timm

Subjects
Physics, Particle physics, Proton, Branching fraction, Hyperon, Radiative decay, Omega, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Limit (mathematics), Fermilab, Nuclear Experiment, Beam (structure)
Abstract

We have searched for the rare hyperon radiative decay Omega- to Xi- gamma, using the Fermilab Proton Center 375 GeV/c charged hyperon beam. Our measurement of the Omega- beam fraction at 13.6 m from production is (4.8 +_ 0.4)10**(-5). No signal was found and we determine a new upper limit of (4.6 x 10**-4) at 90% CL for the Omega- to Xi- gamma branching ratio.

Published
1994

9. First measurement ofπ−e→π−eγpion virtual compton scattering

Author

A. Ocherashvili, G. Alkhazov, A. G. Atamantchouk, M. Y. Balatz, N. F. Bondar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, A. G. Dolgolenko, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, I. Giller, V. L. Golovtsov, P. Gouffon, E. Gülmez, He Kangling, M. Iori, S. Y. Jun, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, I. Konorov, A. P. Kozhevnikov, A. G. Krivshich, H. Krüger, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, Li Yunshan, M. Luksys, T. Lungov, V. P. Maleev, D. Mao, Mao Chensheng, Mao Zhenlin, P. Mathew, M. Mattson, V. Matveev, E. McCliment, M. A. Moinester, V. V. Molchanov, A. Morelos, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, Y. Onel, E. Ozel, S. Ozkorucuklu, A. Penzo, S. I. Petrenko, P. Pogodin, B. Pouh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, P. Schiavon, J. Simon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, K. Vorwalter, J. You, Zhao Wenheng, Zheng Shuchen, and R. Zukanovich-Funchal

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Chiral perturbation theory, 010308 nuclear & particles physics, Monte Carlo method, Compton scattering, Sigma, Electron, 01 natural sciences, Nuclear physics, Cross section (physics), Pion, 0103 physical sciences, High Energy Physics::Experiment, Fermilab, 010306 general physics
Abstract

Pion virtual compton scattering (VCS) via the reaction pi(-)e-->pi(-)egamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi(-) beam incident on target atomic electrons, detecting the incident pi(-) and the final state pi(-), electron and gamma. Theoretical predictions based on chiral perturbation theory are incorporated into a Monte Carlo simulation of the experiment and are compared to the data. The number of reconstructed events (=9) and their distribution with respect to the kinematic variables (for the kinematic region studied) are in reasonable accord with the predictions. The corresponding pi(-) VCS experimental cross section is sigma=38.8+/-13 nb, in agreement with the theoretical expectation of sigma=34.7 nb.

Published
2002

10. Measurement of theΣ¯−lifetime and direct comparison with theΣ+lifetime

Author

Zhao Wenheng, Zheng Shuchen, J. Langland, D Chen, Alexei Khanzadeev, I. F. Albuquerque, P. S. Cooper, C. R. Newsom, L. N. Uvarov, A. V. Dobrovolsky, Li Yunshan, An.A. Vorobyov, Carlos Escobar, I. I. Tkatch, J. Lach, S. Timm, Li Chengze, Dai Lisheng, P. Gouffon, Zhong Yuanyuan, M. Luksys, R.F. Barbosa, V.A. Schegelsky, Vincent J Smith, Tang Fukun, A. M. F. Endler, A. S. Denisov, H. Gottschalk, M. Foucher, N. P. Kuropatkin, V. T. Grachev, J. R. P. Mahon, V. L. Golovtsov, T. Dubbs, Kubantsev, V. M. Samsonov, Yan Jie, E. McCliment, R.A. Carrigan, Shi Huanzhang, N. K. Terentyev, Lang Pengfei, A. Morelos, M. C. Pommot Maia, and N. F. Bondar

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Hyperon, Sigma
Published
1999

11. High-precision measurement of polarized-Σ−beta decay

Author

D. M. Seliverstov, Panos A Razis, J. P. Berge, S. Y. Hsueh, E. McCliment, V.A. Schegelsky, A. E. Brenner, N. K. Terentyev, E. W. Anderson, P. Grafström, E. Jastrzembski, J. Lach, N. Smirnov, J. Tang, V. T. Grachev, I. I. Tkatch, E. C. Swallow, Vincent J Smith, A. S. Denisov, R. Winston, A. A. Vorobyov, G. Zapalac, L. J. Teig, R. Raja, D. Muller, J. P. Marriner, P. S. Cooper, and C. R. Newsom

Subjects
Nuclear reaction, Semileptonic decay, Physics, Particle decay, Particle physics, Antiparticle, Hadron, Elementary particle, Symmetry group, Sigma baryon
Abstract

We report the results of a polarized-${\ensuremath{\Sigma}}^{\mathrm{\ensuremath{-}}}$ beta-decay experiment carried out in the Fermilab Proton Center charged-hyperon beam. These results are based on 49 671 observed ${\ensuremath{\Sigma}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${\mathrm{ne}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\nu}\ifmmode\bar\else\textasciimacron\fi{} decays. The ${\ensuremath{\Sigma}}^{\mathrm{\ensuremath{-}}}$ beam had a nominal momentum of 250 GeV/c and was produced by 400-GeV/c protons im- pinging on a Cu target. At a production angle of 2.5 mrad, the polarization was (23.6\ifmmode\pm\else\textpm\fi{}4.3)%. The decay asymmetries of the electron (${\ensuremath{\alpha}}_{e}$=-0.519\ifmmode\pm\else\textpm\fi{}0.104), neutron (${\ensuremath{\alpha}}_{n}$=+0.509\ifmmode\pm\else\textpm\fi{}0.102), and antineutrino (${\ensuremath{\alpha}}_{\ensuremath{\nu}}$=-0.230\ifmmode\pm\else\textpm\fi{}0.061) were measured and used to establish sign and approximate magnitude of the axial-vector-to-vector form-factor ratio ${g}_{1}$/${f}_{1}$. The form-factor ratios \ensuremath{\Vert}${g}_{1}$/${f}_{1}$\ensuremath{\Vert} and ${f}_{2}$/${f}_{1}$ were determined most sensitively from the neutron and electron center-of-mass spectra, respectively. We obtain \ensuremath{\Vert}${\mathit{g}}_{1}$/${\mathit{f}}_{1}$-0.237${\mathit{g}}_{2}$/${\mathit{f}}_{1}$\ensuremath{\Vert}=0.327\ifmmode\pm\else\textpm\fi{}0.007\ifmmode\pm\else\textpm\fi{}0.019 and ${\mathit{f}}_{2}$(0)/${\mathit{f}}_{1}$(0)=-0.96\ifmmode\pm\else\textpm\fi{}0.97\ifmmode\pm\else\textpm\fi{}0.13, where the stated errors are statistical and systematic, respectively. A general fit that includes the asymmetries and makes the conventional assumption ${g}_{2}$=0 gives the final value ${g}_{1}$(0)/${f}_{1}$(0)=-0.328\ifmmode\pm\else\textpm\fi{}0.019. The data are also compatible with positive values for ${g}_{2}$/${f}_{1}$ combined with corresponding reduced values for \ensuremath{\Vert}${g}_{1}$/${f}_{1}$\ensuremath{\Vert}. .AE

Published
1988

12. Measurement of theΣ−Magnetic Moment Using theΣ−→ne−ν¯andΣ−→nπ−Decay Modes

Author

E. McCliment, R. Raja, I. I. Tkatch, G. Zapalac, E. C. Swallow, D. M. Seliverstov, R. Winston, V.A. Schegelsky, A. S. Denisov, E. Jastrzembski, A. E. Brenner, N. Smirnov, J. Tang, D. Muller, N. K. Terentyev, E. W. Anderson, J. P. Marriner, V. T. Grachev, Panos A Razis, P. S. Cooper, Vincent J Smith, C. R. Newsom, An.A. Vorobyov, P. Grafström, L. J. Teig, J. Lach, J. P. Berge, and S. Y. Hsueh

Subjects
Semileptonic decay, Physics, Meson, Magnetic moment, Hadron, General Physics and Astronomy, Sigma, Nuclear physics, Baryon, Particle decay, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

We have used the spin-precession technique to measure the ..sigma../sup -/ magnetic moment (..mu../sub ..sigma../). A ..sigma../sup -/ beam with a polarization of 22% was produced by a 400-GeV proton beam striking a Cu target at nominal production angles of +- 3 mrad. We simultaneously recorded 21X0 ..sigma../sup -/..-->..ne/sup -/nu-bar decays and 650X0 ..sigma../sup -/..-->..n..pi../sup -/ decays at ..sigma../sup -/ beam momenta of 253 and 308 GeV/c. We find that ..mu../sub ..sigma../ = -1.166 +- 0.014 +- 0.010 nuclear magnetons, where the quoted errors are statistical and systematic, respectively.

Published
1986

13. New measurement of the production polarization and magnetic moment of theΞ−hyperon

Author

A. E. Brenner, J. Lach, S. Y. Hsueh, R. Raja, E. McCliment, Vincent J Smith, E. W. Anderson, L. H. Trost, V.A. Schegelsky, P. Grafström, E. Jastrzembski, J. P. Marriner, D. M. Seliverstov, D. Muller, I. I. Tkatch, E. C. Swallow, R. Winston, P. S. Cooper, V. T. Grachev, C. R. Newsom, N. Smirnov, J. Tang, J. P. Berge, Panos A Razis, A. S. Denisov, L. J. Teig, G. Zapalac, A. A. Vorobyov, and N. K. Terentyev

Subjects
Baryon, Physics, Nuclear reaction, Particle physics, Crystallography, Magnetic moment, Hadron, Hyperon, Elementary particle, Fermion, Xi baryon
Abstract

We have measured the production polarization and magnetic moment of a sample of 89{times}10{sup 3} {Xi}{sup {minus}} hyperons produced in the inclusive reaction {ital p}(400 GeV/{ital c})+Cu{r arrow}{Xi}{sup {minus}}+X. The weighted average of the polarization is {minus}0.070{plus minus}0.008{plus minus}0.010 at a {ital p}{sub {ital t}} of 0.63 GeV/{ital c}. The {Xi}{sup {minus}}'s magnetic moment yields the value {mu}{sub {Xi}}={minus}0.661{plus minus}0.036{plus minus}0.036 nuclear magnetons. The first error is statistical, the second systematic.

Published
1989

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