European Laboratory for Particle Physics Bottomonium and Drell-yan Production in P-a Collisions at 450 Gev Na50 Collaboration
European Laboratory for Particle Physics Bottomonium and Drell-yan Production in P-a Collisions at 450 Gev Na50 Collaboration
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B. Alessandro;C. Alexa;R. Arnaldi;M. Atayan;S. Beoì;V. Boldea;P. Bordalo;G. Borges;J. Castor;B. Chaurand;B. Cheynis;E. Chiavassa;C. Cicaì;M. Comets;S. Constantinescu;P. Cortese;A. De Falco;N. De Marco;G. Dellacasa;A. Devaux;S. Dita;J. Fargeix;P. Force;M. Gallio;C. Gerschel;P. Giubellino;M. Golubeva;A. Grigoryan;J. Grossiord
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作者：
B. Alessandro;C. Alexa;R. Arnaldi;M. Atayan;S. Beoì;V. Boldea;P. Bordalo;G. Borges;J. Castor;B. Chaurand;B. Cheynis;E. Chiavassa;C. Cicaì;M. Comets;S. Constantinescu;P. Cortese;A. De Falco;N. De Marco;G. Dellacasa;A. Devaux;S. Dita;J. Fargeix;P. Force;M. Gallio;C. Gerschel;P. Giubellino;M. Golubeva;A. Grigoryan;J. Grossiord
NA 50协作组测量了在450 GeV入射能量（29.1 GeV）的p-A碰撞中重夸克偶素的产生。我们在这里报告的结果的生产的π态和高质量的Drell-Yan μ子对（m µµ > 6 GeV/c 2）。在中快度的横截面和A-依赖的测得的产量的确定和比较与其他固定目标实验的结果，并与现有的理论估计。最后，我们还讨论了有关测量的双μ子的横向动量分布的一些问题。
The NA50 Collaboration has measured heavy-quarkonium production in p-A collisions at 450 GeV incident energy (√ s = 29.1 GeV). We report here results on the production of the Υ states and of high-mass Drell-Yan muon pairs (m µµ > 6 GeV/c 2). The cross-section at midrapidity and the A-dependence of the measured yields are determined and compared with the results of other fixed-target experiments and with the available theoretical estimates. Finally, we also address some issues concerning the transverse momentum distributions of the measured dimuons.