Azimuthal Anisotropy of Photon and Charged Particle Emission in 208 Pb + 208 Pb Collisions at 158 · A GeV / c WA 98 Collaboration

M. M. Aggarwal,Z. Ahammed,A. L. S. Angelis,V. Antonenko,V. Arefiev,V. Astakhov,V. Avdeitchikov,T. C. Awes,P. V. K. S. Baba,S. K. Badyal,S. Bathe,B. Batiounia,T. Bernier,V. S. Bhatia,C. Blume,D. Bucher,H. Büsching,L. Carlén,S. Chattopadhyay,M. P. Decowski,H. Delagrange,P. Donni,M. R. Dutta Majumdar,A. K. Dubey,K. El Chenawi,K. Enosawa,S. Fokin,V. Frolov,M. S. Ganti,S. Garpman,O. Gavrishchuk,F. J. M. Geurts,T. K. Ghosh,R. Glasow,B. Guskov,H. Å. Gustafsson,H. H. Gutbrod,I. Hrivnacova,M. Ippolitov,H. Kalechofsky,K. Karadjev,K. Karpio,B. W. Kolb,I. Kosarev,I. Koutcheryaev,A. Kugler,P. Kulinich,M. Kurata,A. Lebedev,H. Löhner,L. Luquin,D. P. Mahapatra,V. Manko,M. Martin,G. Martı́nez,A. Maximov,Y. Miake,G. C. Mishra,B. Mohanty,M.-J. Mora,D. Morrison,T. Moukhanova,D. S. Mukhopadhyay,H. Naef,B. K. Nandi,S. K. Nayak,T. K. Nayak,A. Nianine,V. Nikitine,S. Nikolaev,P. Nilsson,S. Nishimura,P. Nomokonov,J. Nystrand,A. Oskarsson,I. Otterlund,T. Peitzmann,D. Peressounko,V. Petracek,S. C. Phatak,W. Pinganaud,F. Plasil,M. L. Purschke,J. Rak,R. Raniwala,S. Raniwala,N. K. Rao,F. Retiere,K. Reygers,G. Roland,L. Rosselet,I. Roufanov,C. Roy,J. M. Rubio,S. S. Sambyal,R. Santo,S. Sato,H. Schlagheck,H.-R. Schmidt,Y. Schutz,G. Shabratova,T. H. Shah,I. Sibiriak,T. Siemiarczuk,D. Silvermyr,B. C. Sinha,N. Slavine,K. Söderström,G. Sood,S. P. Sørensen,P. Stankus,G. Stefanek,P. Steinberg,E. Stenlund,M. Sumbera,T. Svensson,A. Tsvetkov,L. Tykarski,E. C. v. d. Pijll,N. v. Eijndhoven,G. J. v. Nieuwenhuizen,A. Vinogradov,Y. P. Viyogi,A. Vodopianov,S. Vörös,B. Wysłouch,G. R. Young

semanticscholar（2004）

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Abstract

The azimuthal distributions of photons and charged particl es with respect to the event plane are investigated as a function of centrality inPb +Pb collisions at 158·A GeV/c in the WA98 experiment at the CERN SPS. The anisotropy of the azimuthal distributions is characterize d using a Fourier analysis. For both the photon and charged particle distributions the first two Fourier coefficients ar e observed to decrease with increasing centrality. The obse rved anisotropies of the photon distributions compare well with the expectations from the charged particle measurements fo r all centralities. PACS. 25.75.Dw Particle production, azimuthal anisotropy, flow 2 M.M. Aggarwal et al.: Azimuthal Anisotropy of Photon and Ch arged Particle Emission in Pb +Pb Collisions at 158·A GeV/c

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