A METHOD FOR MEASURING ELLIPTIC FLOW FLUCTUATIONS WITH THE PHOBOS DETECTOR

BURAK ALVER,B. B. Back,M. D. Baker, M. Ballintijn,D. S. Barton,R. R. Betts,A. A. Bickley,R. Bindel, W. Busza,A. Carroll,Z. Chai,M. P. Decowski,E. Garc,T. Gburek,N. George,K. Gulbrandsen,C. Halliwell,J. Hamblen,M. Hauer,C. Henderson,D. J. Hofman,R. S. Hollis,R. Ho,B. Holzman,A. Iordanova, E. Johnson,J. L. Kane,N. Khan,P. Kulinich,C. M. Kuo,W. Li,W. T. Lin, C. Loizides, S. Manly,A. C. Mignerey,R. Nouicer,A. Olszewski,R. Pak,C. Reed,C. Roland, G. Roland,J. Sagerer,H. Seals,I. Sedykh,C. E. Smith,M. A. Stankiewicz, P. Steinberg,G. S. F. Stephans,A. Sukhanov, M. B. Tonjes, A. Trzupek,C. Vale,G. J. van Nieuwenhuizen,S. S. Vaurynovich,R. Verdier,G. I. Veres,P. Walters,E. Wenger,F. L. H. Wolfs,B. Wosiek,K. Wozniak,B. Wys

INTERNATIONAL JOURNAL OF MODERN PHYSICS E（2012）

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摘要

We have performed the first measurement of elliptic flow (upsilon(2)) fluctuations in nucleus-nucleus collisions. In this paper, we describe the analysis method we have developed for this measurement. In this method, upsilon(2) is determined event-by-event by a maximum likelihood fit. The non-statistical fluctuations are determined by unfolding the contribution of statistical fluctuations and detector effects using Monte Carlo simulations. Application of this method to measure dynamical fluctuations in events from a different Monte Carlo event generator is presented.

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elliptic flow,monte carlo simulation,maximum likelihood,monte carlo

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