Measurement ofΥ(1S+2S+3S)production inp+pand Au + Au collisions atsNN=200GeV

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Bickley,B Bassalleck,A Berdnikov,B Komkov,D J Kim,B Azmoun,Y Tanaka,Y Morino,Y I Makdisi,M Naglis,J C Hill,D Layton,A Garishvili,M Tomášek,T V Moukhanova,K Imai,H Masui,M Javani,Y Ikeda,M D Malik,B Lewis,A Kozlov,M Mccumber,M Stepanov,M Inaba,V Pantuev,B K Singh,D Kotov,A Taranenko,B H Park,V Riabov,M Rosati,C Zhang,S Dairaku,S Chernichenko,H Pei,A Dion,A K Mohanty,D Jouan,S R Lee,A Bazilevsky,C Gal,Y Riabov,A K Dubey,C P Singh,P Tarján,K Haruna,W J Park,J L Nagle,J Kapustinsky,V Baublis,A Vossen,C L Woody,E Richardson,D Yu Peressounko,Y Kwon,T Fusayasu,K Yamaura,B Lenzi,M Nguyen,K Nakamura ,D Silvermyr,B Chang ,T Nagae,F Křížek ,Jeongsu Bok ,V Semenov,T Chujo,J Alexander,K Watanabe,F Ellinghaus,J T Mitchell,Y Miyachi,S K Park,R Han,A Malakhov,I H Park,T Isobe,D Dutta,H J Kim,K B Kim ,W Xie,P Růžička ,L B Guo ,А Виноградов ,J M Durham,Christian Klein-Boesing ,X He,J Jin,T Gunji,H J Moon,P Rukoyatkin,Kazuo Aoki ,Y K Kim,A Soldatov,B Jacak ,V Samsonov,J L Charvet ,C Y ,D Blau ,C A Aidala ,C Muñoz Camacho ,E Kinney,B Lee,S Choi,A Angerami,S White ,R Hayano,M Csanád,P Kline,D D’enterria ,A Baldisseri,L Ding,Sanghoon Lim ,M Mishra,R Averbeck,Y J Kim ,Mei Bai ,E Haslum,M Ishihara,E Kim,K S Joo,X R Wang,Z H Citron ,S S.e Rosendahl ,H Torii,D P Morrison,E O’brien ,Yue Shi Lai ,C H Chen ,Yasuhiro Tomita ,P Constantin,A Öskarsson ,A Sen,A P.t Palounek ,T A Shibata ,J Kamin,H Borel,K F Read,J Park,A M Sickles ,H Å Gustafsson ,J L Klay ,M Vargyas,A Khanzadeev,A Basye ,J P Wessels ,D Reynolds,S Masumoto,K B Lee,S Huang,B H Kang,H Asano,H En’yo ,M Daugherity ,S Campbell,A Datta,B I Kim,C Maguire ,K Hashimoto,H Al-Ta’ani ,J Gösset ,S Sakai,S Sörensen ,V Vrba,K I Hahn,Y Yamaguchi ,S Greene ,V Manko ,R Wei,D Mcglinchey,C Nattrass,V N Tram ,T Csörgõ ,S Fokin ,J Choi ,M Kurosawa,A Semenov ,M X Liu,T Mibe,E J Kim ,O Chvála ,M Oka,B Cole ,K Fujiwara,Laurent D’orazio ,M Sano,J C Peng ,A Takahara,С Беликов ,Jun Kikuchi ,S Oda ,H Iinuma,J Rak,A Milov,R Akimoto,C Kim,М Фингер ,A Deshpande,H Liu,Yusuke Komatsu ,X Li,Z Y You ,Stephen Baumgart ,V K Singh ,Daisuke Watanabe ,K Miki,A Morreale,A Rakotozafindrabe

doi:10.1103/physrevc.91.024913

Abstract

Measurements of bottomonium production in heavy ion and $p$$+$$p$ collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three $\Upsilon$ states, $\Upsilon(1S+2S+3S)$, was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au$+$Au and $p$$+$$p$ collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The $\Upsilon(1S+2S+3S)\rightarrow e^+e^-$ differential cross section at midrapidity was found to be $B_{\rm ee} d\sigma/dy =$ 108 $\pm$ 38 (stat) $\pm$ 15(syst) $\pm$ 11 (luminosity) pb in $p$$+$$p$ collisions. The nuclear modification factor in the 30\% most central Au$+$Au collisions indicates a suppression of the total $\Upsilon$ state yield relative to the extrapolation from $p$$+$$p$ collision data. The suppression is consistent with measurements made by STAR at RHIC and at higher energies by the CMS experiment at the Large Hadron Collider.

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