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Transverse-Momentum Fluctuations in $π^{+} p$ and $K^{+} p$ Collisions at $250 G e V / c$

M. R. Atayan, Bai Yuting, E. A. De Wolf, A. M. F. Endler, Fu Jinghua, H. Gulkanyan, R. Hakobyan, W. Kittel, Liu Lianshou, Z. V. Metreveli, L. N. Smirnova, L. A. Tikhonova, A. G. Tomaradze, F. Verbeure, Wu Yuanfang, and S. A. Zotkin (EHS/NA22 Collaboration)

Phys. Rev. Lett. 89, 121802 – Published 30 August 2002

Abstract

We report results on event-by-event fluctuations of transverse momentum, $Φ_{p_{t}}$ , in $π^{+} p$ and $K^{+} p$ collisions at $250 G e V / c$ . For the first time, their dependence on rapidity region, transverse momentum acceptance, multiplicity, mean transverse momentum per event, and on the correlation between transverse momentum and multiplicity are systematically presented. The results are compared with those from the PYTHIA Monte Carlo generator. The fluctuations under the same acceptance cuts as used in current heavy-ion experiments are also presented.

Received 25 April 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.121802

Authors & Affiliations

M. R. Atayan¹, Bai Yuting², E. A. De Wolf³, A. M. F. Endler⁴, Fu Jinghua², H. Gulkanyan¹, R. Hakobyan¹, W. Kittel⁵, Liu Lianshou², Z. V. Metreveli^6,*, L. N. Smirnova⁷, L. A. Tikhonova⁷, A. G. Tomaradze^6,*, F. Verbeure³, Wu Yuanfang², and S. A. Zotkin^7,† (EHS/NA22 Collaboration)

¹Institute of Physics, AM-375036 Yerevan, Armenia
²Institute of Particle Physics, Hua-Zhong Normal University, Wuhan 430070, China
³Department of Physics, Universitaire Instelling Antwerpen, B-2610 Wilrijk, Belgium
⁴Centro Brasileiro de Pesquisas Fisicas, BR-22290 Rio de Janeiro, Brazil
⁵High Energy Physics Institute (HEFIN), University of Nijmegen/NIKHEF, NL-6525 ED Nijmegen, The Netherlands
⁶Institute for High Energy Physics of Tbilisi State University, GE-380086 Tbilisi, Georgia
⁷Scobeltsyn Institute of Nuclear Physics, Lomonosow Moscow State University, RU-119899 Moscow, Russia

^*Present address: Northwestern University, Evanston, IL 60208.
^†Present address: DESY, Notkestrasse 85, D-22607, Hamburg, Germany.

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Vol. 89, Iss. 12 — 16 September 2002

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Physical Review Letters

Transverse-Momentum Fluctuations in π+p and K+p Collisions at 250 GeV/c

M. R. Atayan, Bai Yuting, E. A. De Wolf, A. M. F. Endler, Fu Jinghua, H. Gulkanyan, R. Hakobyan, W. Kittel, Liu Lianshou, Z. V. Metreveli, L. N. Smirnova, L. A. Tikhonova, A. G. Tomaradze, F. Verbeure, Wu Yuanfang, and S. A. Zotkin (EHS/NA22 Collaboration)

Phys. Rev. Lett. 89, 121802 – Published 30 August 2002

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Transverse-Momentum Fluctuations in $π^{+} p$ and $K^{+} p$ Collisions at $250 G e V / c$