J/ψ production via χc decays in 920 GeV pA interactions

被引：33

作者：

Abt, I ^{[1
]}

Adams, M

Albrecht, H

Amaral, V

Amorim, A

Aplin, SJ

Arefiev, A

Ariño, I

Atiya, M

Aushev, V

Bagaturia, Y

Baghshetsyan, R

Balagura, V

Bargiotti, M

Barsuk, S

Barsukova, O

Bassetti, V

Bastos, J

Bauer, C

Bauer, TS

Beck, M

Belkov, A

Belotelov, I

Belyaev, I

Berkhan, K

Bertin, A

Bobchenko, B

Böcker, M

Bogatyrev, A

Bohm, G

Borgmeier, C

Bräuer, M

Broemmelsiek, D

Bruinsma, M

Bruschi, M

Buchholz, P

Buchler, M

Buran, T

Capeán, M

Capponi, M

Carvalho, J

Chamanina, J

Chen, BX

Chistov, R

Chmeissani, M

Christensen, A

Conde, P

Cruse, C

Dam, M

机构：

[1] Univ Texas, Dept Phys, Austin, TX 78712 USA

[2] Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[3] Inst High Energy Phys, Beijing 100039, Peoples R China

[4] Tsinghua Univ, Inst Engn Phys, Beijing 100084, Peoples R China

[5] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany

[6] Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy

[7] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

[8] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

[9] LIP Coimbra & Lisboa, P-3004516 Coimbra, Portugal

[10] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[11] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48202 USA

[12] Univ Dortmund, Inst Phys, D-44227 Dortmund, Germany

[13] Northwestern Univ, Evanston, IL 60208 USA

[14] DESY, D-22603 Hamburg, Germany

[15] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[16] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[17] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[18] Univ Houston, Dept Phys, Houston, TX 77204 USA

来源：

PHYSICS LETTERS B | 2003年 / 561卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(03)00407-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data collected by the HERA-B experiment, we have measured the fraction of J/psi's produced via radiative chi(c) decays in interactions of 920 GeV protons with carbon and titanium targets. We obtained R-chic = 0.32 +/- 0.06(stat) +/- 0.04(sys) for the fraction of J/psi from chi(c) decays averaged over proton-carbon and proton-titanium collisions. This result is in agreement with previous measurements and is compared with theoretical predictions. (C) 2003 Published by Elsevier Science B.V.

引用

页码：61 / 72

页数：12

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