کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9851013 | 1527282 | 2005 | 74 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The PHOBOS perspective on discoveries at RHIC
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper describes the conclusions that can be drawn from the data taken thus far with the PHOBOS detector at RHIC. In the most central Au + Au collisions at the highest beam energy, evidence is found for the formation of a very high energy density system whose description in terms of simple hadronic degrees of freedom is inappropriate. Furthermore, the constituents of this novel system are found to undergo a significant level of interaction. The properties of particle production at RHIC energies are shown to follow a number of simple scaling behaviors, some of which continue trends found at lower energies or in simpler systems. As a function of centrality, the total number of charged particles scales with the number of participating nucleons. When comparing Au + Au at different centralities, the dependence of the yield on the number of participants at higher pT (â¼4GeV/c) is very similar to that at low transverse momentum. The measured values of charged particle pseudorapidity density and elliptic flow were found to be independent of energy over a broad range of pseudorapidities when effectively viewed in the rest frame of one of the colliding nuclei, a property we describe as “extended longitudinal scaling”. Finally, the centrality and energy dependences of several observables were found to factorize to a surprising degree.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics A - Volume 757, Issues 1â2, 8 August 2005, Pages 28-101
Journal: Nuclear Physics A - Volume 757, Issues 1â2, 8 August 2005, Pages 28-101
نویسندگان
PHOBOS Collaboration PHOBOS Collaboration, B.B. Back, M.D. Baker, M. Ballintijn, D.S. Barton, B. Becker, R.R. Betts, A.A. Bickley, R. Bindel, A. Budzanowski, W. Busza, A. Carroll, Z. Chai, M.P. Decowski, E. GarcÃa, T. Gburek, N.K. George,