Phys. Rev. D
70,
112005
(2004)
[6 pages]
Polarization of Σ+ hyperons produced by 800 GeV/c protons on Cu and Be
P. Pogodin et al. SELEX Collaboration
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P. Pogodin16,*, G. Alkhazov11, A. G. Atamantchouk11,†, M. Y. Balatz8,†, N. F. Bondar11, P. S. Cooper5, L. J. Dauwe17, G. V. Davidenko8, U. Dersch9,‡, A. G. Dolgolenko8, G. B. Dzyubenko8, R. Edelstein3, L. Emediato19, A. M. F. Endler4, J. Engelfried13,5, I. Eschrich9,§, C. O. Escobar19,**, A. V. Evdokimov8, I. S. Filimonov10,†, F. G. Garcia19,5, M. Gaspero18, I. Giller12, V. L. Golovtsov11, P. Gouffon19, E. Gülmez2, He Kangling7, M. Iori18, S. Y. Jun3, M. Kaya16, J. Kilmer5, V. T. Kim11, L. M. Kochenda11, I. Konorov9,‡‡, A. P. Kozhevnikov6, A. G. Krivshich11, H. Krüger9,a, M. A. Kubantsev8, V. P. Kubarovsky6, A. I. Kulyavtsev3,5,b, N. P. Kuropatkin11, V. F. Kurshetsov6, A. Kushnirenko3,6, S. Kwan5, J. Lach5, A. Lamberto20, L. G. Landsberg6, I. Larin8, E. M. Leikin10, Li Yushan7, M. Luksys14, T. Lungov19,b, V. P. Maleev11, Mao Chensheng7, D. Mao3,c, Mao Zhenlin7, P. Mathew3,d, M. Mattson3, V. Matveev8, E. McCliment16, M. A. Moinester12, V. V. Molchanov6, A. Morelos13, K. D. Nelson16,e, A. V. Nemitkin10, P. V. Neoustroev11, C. Newsom16, A. P. Nilov8, S. B. Nurushev6, A. Ocherashvili12, E. de Oliveira4, Y. Onel16, E. Ozel16, S. Ozkurucuklu16, A. Penzo20, S. V. Petrenko6, M. Procario3,h, V. A. Prutskoi8, E. Ramberg5, G. F. Rappazzo20, B. V. Razmyslovich11, V. I. Rud10, J. Russ3, P. Schiavon20, J. Simon9,j, A. I. Sitnikov8, D. Skow5, V. J. Smith15, M. Srivastava19, V. Steiner12, V. Stepanov11, L. Stutte5, M. Svoiski11, N. K. Terentyev11,3, G. P. Thomas1, L. N. Uvarov11, A. N. Vasiliev6, D. V. Vavilov6, V. S. Verebryusov8, V. A. Victorov6, V. E. Vishnyakov8, A. A. Vorobyov11, K. Vorwalter9,k, J. You3,5, Zhao Wenheng7, Zheng Shuchen7, and R. Zukanovich-Funchal19 (SELEX Collaboration)
1Ball State University, Muncie, Indiana 47306, USA
2Bogazici Univerity, Bebek 34342 Istanbul, Turkey
3Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213, USA
4Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil
5Fermi National Acceleratory Laboratory, Batavia, Illinois 60510, USA
6Institute for High Energy Physics, Protvino, Russia
7Institute for High Energy Physics, Beijing, Peoples's Republic of China
8Institute of Theoretical and Experimental Physics, Moscow, Russia
9Max-Planck-Institut für Kernphysik 69117, Heidelberg, Germany
10Moscow State University, Moscow, Russia
11Petersburg Nuclear Physics Institute, St. Petersburg, Russia
12Tel Aviv University, 69978 Ramat Aviv, Israel
13Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
14Universidade Ferderal da Paraíba, Paraíba, Brazil
15University of Bristol, Bristol BS8 1TL, United Kingdom
16University of Iowa, Iowa City, Iowa 52242, USA
17University of Michigan-Flint, Flint, Michigan 48502, USA
18University of Rome “La Sapienza” and INFN, Rome, Italy
19University of São Paulo, São Paulo, Brazil
20University of Trieste and INFN, Trieste, Italy
Received 12 September 2003; revised 7 September 2004; published 20 December 2004
We show that Σ+ hyperons produced by 800 GeV/c protons on targets of Be and Cu have significant polarizations (15–20%). These polarizations persist at values of pt≈2 GeV/c and a wide range of xF. The polarizations from the Cu target are consistently less than from Be. The average ratio of the Σ+ polarization from Cu to that from Be is 0.68±0.08.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.70.112005
DOI:
10.1103/PhysRevD.70.112005
PACS:
13.88.+e, 13.85.Ni, 14.20.Jn
*Present address: Legal Department, Oracle Corporation, Redwood Shores, CA, USA †deceased ‡Present address: Infinion, München, Germany §Present address: Imperial College, London SW7 2BZ, United Kingdom **Present address: Instituto de Física da Universidade Estadual de Campinas, UNICAMP, São Paulo, Brazil ††Present address: Kafkas University, Kars, Turkey ‡‡Present address: Physik-Department, Technische Universität München, 85748 Garching, Germany aPresent Address:The Boston Consulting Group, München, Germany bPresent address: Instituto de Física Teórica da Universidade Estadual Paulista, São Paulo, Brazil cPresent Address: Lucent Technologies, Naperville, IL, USA dPresent address: SPSS Inc., Chicago, IL, USA ePresent address: University of Alabama at Birmingham, Birmingham, AL 35294, USA fPresent address: Medson Ltd., Rehovot 76702, Israel gPresent address: Sülyman Demirel Universitesi, Isparta, Turkey hPresent address: DOE, Germantown, MD, USA iPresent address: Solidum, Ottawa, ON, Canada jPresent address: Siemens Medizintechnik, Elangen, Germany kPresent address: Deutsche Bank AG, Eschborn, Germany
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