Neutral meson production in p-Be and p-Au collisions at 450 GeV beam energy

被引：30

作者：

Agakichiev, G ^{[1
]}

Appenheimer, M

Averbeck, R

Ballester, F

Baur, R

Brenschede, A

Diaz, J

Drees, A

Faschingbauer, U

Ferrero, JL

Fischer, P

Fraenkel, Z

Franke, M

Fuchs, C

Gatti, E

Glassel, P

Gunzel, T

de los Hero, CP

Hess, F

Holzmann, R

Irmscher, D

Jacob, C

Kuhn, W

Lenkeit, B

Lohner, H

Marin, A

Marques, FM

Martinez, G

Metag, V

Notheisen, M

Novotny, R

Olsen, LH

Schon, A

Schukraft, J

Ostendorf, R

Panebrattsev, Y

Pfeiffer, A

Ravinovich, I

Rehak, P

Sampietro, M

Schutz, Y

Shimansky, S

Shor, A

Simon, RS

Specht, HJ

Steiner, V

Tapprogge, S

Tel-Zur, G

Tserruya, I

Ullrich, T

机构：

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

[2] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[3] GSI Darmstadt, D-64220 Darmstadt, Germany

[4] Inst Fis Corpuscular, E-46100 Burjassot, Valencia, Spain

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

[6] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[7] Politecn Milan, I-20133 Milan, Italy

[8] Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands

[9] GANIL, F-14021 Caen, France

[10] Brookhaven Natl Lab, Upton, NY 11973 USA

[11] CERN, CH-1211 Geneva 23, Switzerland

来源：

EUROPEAN PHYSICAL JOURNAL C | 1998年 / 4卷 / 02期

关键词：

D O I：

10.1007/s100529800804

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In a joint experiment the TAPS and CERES collaborations have studied the production of the neutral mesons pi degrees; eta and omega in 450 GeV p-Be and p-Au collisions at the CERN SPS. The mesons were identified by their pi degrees --> gamma gamma, eta --> gamma gamma, and omega --> pi degrees gamma decay modes. The cross sections were measured down to very low p(T) (greater than or equal to 20 MeV/c) near mid-rapidity (3.0 <: y < 4.0). The eta and omega, cross sections are smaller than expected from extrapolations of earlier. data to low p(T). Integrated over all p(T), the ratios eta/pi degrees and omega/pi degrees are lower by about 25% compared to previously published values. The reduction may be attributed to the large number of low pr pions from decays of heavier mesons. In addition, we have studied the dependence of neutral meson production on the mass of the nuclear target and find it in good agreement with previous measurements of charged mesons.

引用

页码：249 / 257

页数：9

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