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Charged-to-neutral correlation at forward rapidity in Au+Au collisions at sqrt{s_(NN)}=200 GeV

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arxiv 1408.5017 v1 pith:L7EY3EYP submitted 2014-08-21 nucl-ex hep-ex

Charged-to-neutral correlation at forward rapidity in Au+Au collisions at sqrt{s_(NN)}=200 GeV

STAR Collaboration: N. M. Abdelwahab , L. Adamczyk , J. K. Adkins , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , I. Alekseev , J. Alford
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C. D. Anson A. Aparin D. Arkhipkin E. C. Aschenauer G. S. Averichev A. Banerjee D. R. Beavis R. Bellwied A. Bhasin A. K. Bhati P. Bhattarai J. Bielcik J. Bielcikova L. C. Bland I. G. Bordyuzhin W. Borowski J. Bouchet A. V. Brandin S. G. Brovko S. B\"ultmann I. Bunzarov T. P. Burton J. Butterworth H. Caines M. Calder\'on de la Barca S\'anchez J. M. Campbell D. Cebra R. Cendejas M. C. Cervantes P. Chaloupka Z. Chang S. Chattopadhyay H. F. Chen J. H. Chen L. Chen J. Cheng M. Cherney A. Chikanian W. Christie J. Chwastowski M. J. M. Codrington G. Contin J. G. Cramer H. J. Crawford X. Cui S. Das A. Davila Leyva L. C. De Silva R. R. Debbe T. G. Dedovich J. Deng A. A. Derevschikov R. Derradi de Souza B. Di Ruzza L. Didenko C. Dilks F. Ding P. Djawotho X. Dong J. L. Drachenberg J. E. Draper C. M. Du L. E. Dunkelberger J. C. Dunlop L. G. Efimov J. Engelage K. S. Engle G. Eppley L. Eun O. Evdokimov O. Eyser R. Fatemi S. Fazio J. Fedorisin P. Filip Y. Fisyak C. E. Flores C. A. Gagliardi D. R. Gangadharan D. Garand F. Geurts A. Gibson M. Girard S. Gliske L. Greiner D. Grosnick D. S. Gunarathne Y. Guo A. Gupta S. Gupta W. Guryn B. Haag A. Hamed L-X. Han R. Haque J. W. Harris S. Heppelmann A. Hirsch G. W. Hoffmann D. J. Hofman S. Horvat B. Huang H. Z. Huang X. Huang P. Huck T. J. Humanic G. Igo W. W. Jacobs H. Jang E. G. Judd S. Kabana D. Kalinkin K. Kang K. Kauder H. W. Ke D. Keane A. Kechechyan A. Kesich Z. H. Khan D. P. Kikola I. Kisel A. Kisiel D. D. Koetke T. Kollegger J. Konzer I. Koralt L. K. Kosarzewski L. Kotchenda A. F. Kraishan P. Kravtsov K. Krueger I. Kulakov L. Kumar R. A. Kycia M. A. C. Lamont J. M. Landgraf K. D. Landry J. Lauret A. Lebedev R. Lednicky J. H. Lee C. Li W. Li X. Li Y. Li Z. M. Li M. A. Lisa F. Liu T. Ljubicic W. J. Llope M. Lomnitz R. S. Longacre X. Luo G. L. Ma Y. G. Ma D. P. Mahapatra R. Majka S. Margetis C. Markert H. Masui H. S. Matis D. McDonald T. S. McShane N. G. Minaev S. Mioduszewski B. Mohanty M. M. Mondal D. A. Morozov M. K. Mustafa B. K. Nandi Md. Nasim T. K. Nayak J. M. Nelson G. Nigmatkulov L. V. Nogach S. Y. Noh J. Novak S. B. Nurushev G. Odyniec A. Ogawa K. Oh A. Ohlson V. Okorokov E. W. Oldag D. L. Olvitt Jr. B. S. Page Y. X. Pan Y. Pandit Y. Panebratsev T. Pawlak B. Pawlik H. Pei C. Perkins P. Pile M. Planinic J. Pluta N. Poljak K. Poniatowska J. Porter A. M. Poskanzer N. K. Pruthi M. Przybycien J. Putschke H. Qiu A. Quintero S. Ramachandran R. Raniwala S. Raniwala R. L. Ray C. K. Riley H. G. Ritter J. B. Roberts O. V. Rogachevskiy J. L. Romero J. F. Ross A. Roy L. Ruan J. Rusnak O. Rusnakova N. R. Sahoo P. K. Sahu I. Sakrejda S. Salur A. Sandacz J. Sandweiss E. Sangaline A. Sarkar J. Schambach R. P. Scharenberg A. M. Schmah W. B. Schmidke N. Schmitz J. Seger P. Seyboth N. Shah E. Shahaliev P. V. Shanmuganathan M. Shao B. Sharma W. Q. Shen S. S. Shi Q. Y. Shou E. P. Sichtermann M. Simko M. J. Skoby D. Smirnov N. Smirnov D. Solanki P. Sorensen H. M. Spinka B. Srivastava T. D. S. Stanislaus J. R. Stevens R. Stock M. Strikhanov B. Stringfellow M. Sumbera X. Sun X. M. Sun Y. Sun Z. Sun B. Surrow D. N. Svirida T. J. M. Symons M. A. Szelezniak J. Takahashi A. H. Tang Z. Tang T. Tarnowsky J. H. Thomas A. R. Timmins D. Tlusty M. Tokarev S. Trentalange R. E. Tribble P. Tribedy B. A. Trzeciak O. D. Tsai J. Turnau T. Ullrich D. G. Underwood G. Van Buren G. van Nieuwenhuizen M. Vandenbroucke J. A. Vanfossen Jr. R. Varma G. M. S. Vasconcelos A. N. Vasiliev R. Vertesi F. Videb{\ae}k Y. P. Viyogi S. Vokal A. Vossen M. Wada F. Wang G. Wang H. Wang J. S. Wang X. L. Wang Y. Wang G. Webb J. C. Webb G. D. Westfall H. Wieman S. W. Wissink Y. F. Wu Z. Xiao W. Xie K. Xin H. Xu J. Xu N. Xu Q. H. Xu Y. Xu Z. Xu W. Yan C. Yang Y. Yang Z. Ye P. Yepes L. Yi K. Yip I-K. Yoo N. Yu H. Zbroszczyk W. Zha J. B. Zhang J. L. Zhang S. Zhang X. P. Zhang Y. Zhang Z. P. Zhang F. Zhao J. Zhao C. Zhong X. Zhu Y. H. Zhu Y. Zoulkarneeva M. Zyzak
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classification nucl-ex hep-ex
keywords fluctuationsdynamicalchargedacceptancecomparedcorrelationfluctuationforward
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Event-by-event fluctuations of the ratio of inclusive charged to photon multiplicities at forward rapidity in Au+Au collision at $\sqrt{s_{NN}}$=200 GeV have been studied. Dominant contribution to such fluctuations is expected to come from correlated production of charged and neutral pions. We search for evidences of dynamical fluctuations of different physical origins. Observables constructed out of moments of multiplicities are used as measures of fluctuations. Mixed events and model calculations are used as baselines. Results are compared to the dynamical net-charge fluctuations measured in the same acceptance. A non-zero statistically significant signal of dynamical fluctuations is observed in excess to the model prediction when charged particles and photons are measured in the same acceptance. We find that, unlike dynamical net-charge fluctuation, charge-neutral fluctuation is not dominated by correlation due to particle decay. Results are compared to the expectations based on the generic production mechanism of pions due to isospin symmetry, for which no significant (<1%) deviation is observed.

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