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Double Helicity Dependence of Jet Properties from Dihadrons in Longitudinally Polarized p+p Collisions at sqrt(s) = 200 GeV

A. Adare S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander K. Aoki Laurent Aphecetche 1 R. Armendariz S.H. Aronson J. Asai E.C. Aschenauer E. T. Atomssa 2 R. Averbeck T.C. Awes B. Azmoun V. Babintsev M. Bai G. Baksay L. Baksay A. Baldisseri 3 K.N. Barish P.D. Barnes B. Bassalleck A.T. Basye S. Bathe S. Batsouli V. Baublis C. Baumann A. Bazilevsky S. Belikov R. Bennett A. Berdnikov Y. Berdnikov A.A. Bickley J.G. Boissevain H. Borel 3 K. Boyle M.L. Brooks H. Buesching V. Bumazhnov G. Bunce S. Butsyk C. Muñoz Camacho S. Campbell B.S. Chang W.C. Chang J.-L. Charvet 3 S. Chernichenko J. Chiba C.Y. Chi M. Chiu I.J. Choi R.K. Choudhury T. Chujo P. Chung A. Churyn V. Cianciolo Z. Citron C.R. Cleven B.A. Cole M.P. Comets 4 P. Constantin M. Csanad T. Csorgo T. Dahms S. Dairaku K. Das G. David M.B. Deaton K. Dehmelt H. Delagrange 1 A. Denisov D. d'Enterria A. Deshpande E.J. Desmond O. Dietzsch A. Dion M. Donadelli O. Drapier 2 A. Drees K.A. Drees A.K. Dubey A. Durum D. Dutta V. Dzhordzhadze Y.V. Efremenko J. Egdemir F. Ellinghaus W.S. Emam T. Engelmore A. Enokizono H. En'Yo S. Esumi K.O. Eyser B. Fadem D.E. Fields M. Finger F. Fleuret 2 S.L. Fokin Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley K. Fujiwara Y. Fukao T. Fusayasu S. Gadrat 5 I. Garishvili A. Glenn H. Gong M. Gonin 2 J. Gosset 3 Y. Goto R. Granier de Cassagnac 2 N. Grau S.V. Greene M. Grosse Perdekamp T. Gunji H.-A. Gustafsson T. Hachiya A. Hadj Henni 1 C. Haegemann J.S. Haggerty H. Hamagaki R. Han H. Harada E.P. Hartouni K. Haruna E. Haslum R. Hayano M. Heffner T.K. Hemmick T. Hester X. He H. Hiejima J.C. Hill R. Hobbs M. Hohlmann W. Holzmann K. Homma B. Hong T. Horaguchi D. Hornback S. Huang T. Ichihara R. Ichimiya Y. Ikeda K. Imai J. Imrek M. Inaba Y. Inoue D. Isenhower L. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov D. Ivanischev B.V. Jacak J. Jia J. Jin O. Jinnouchi B.M. Johnson K.S. Joo D. Jouan 4 F. Kajihara S. Kametani N. Kamihara J. Kamin M. Kaneta J.H. Kang H. Kanou J. Kapustinsky D. Kawall A.V. Kazantsev T. Kempel A. Khanzadeev K.M. Kijima J. Kikuchi B.I. Kim D.H. Kim D.J. Kim E. Kim S.H. Kim E. Kinney K. Kiriluk A. Kiss E. Kistenev A. Kiyomichi J. Klay C. Klein-Boesing L. Kochenda V. Kochetkov B. Komkov M. Konno J. Koster D. Kotchetkov A. Kozlov A. Kr'Al A. Kravitz J. Kubart G.J. Kunde N. Kurihara K. Kurita M. Kurosawa M.J. Kweon Y. Kwon G.S. Kyle R. Lacey Y.-S. Lai Y.S. Lai J.G. Lajoie D. Layton A. Lebedev D.M. Lee K.B. Lee M.K. Lee T. Lee M.J. Leitch M.A.L. Leite B. Lenzi P. Liebing T. Liˇska A. Litvinenko Hong Liu M.X. Liu X. Li B. Love D. Lynch C.F. Maguire Y.I. Makdisi A. Malakhov M.D. Malik V.I. Manko E. Mannel Y. Mao L. Maˇsek H. Masui F. Matathias M. Mccumber P.L. Mcgaughey N. Means B. Meredith Y. Miake P. Mikes K. Miki T.E. Miller A. Milov S. Mioduszewski M. Mishra J.T. Mitchell M. Mitrovski A.K. Mohanty Y. Morino A. Morreale D.P. Morrison T.V. Moukhanova D. Mukhopadhyay J. Murata S. Nagamiya Y. Nagata J.L. Nagle M. Naglis M.I. Nagy I. Nakagawa Y. Nakamiya T. Nakamura K. Nakano J. Newby M. Nguyen T. Niita B.E. Norman R. Nouicer A.S. Nyanin E. O'Brien S.X. Oda C.A. Ogilvie H. Ohnishi H. Okada K. Okada M. Oka O.O. Omiwade Y. Onuki A. Oskarsson M. Ouchida K. Ozawa R. Pak D. Pal A.P.T. Palounek V. Pantuev V. Papavassiliou J. Park W.J. Park S.F. Pate H. Pei J.-C. Peng H. Pereira 3 V. Peresedov D.Yu. Peressounko C. Pinkenburg M.L. Purschke A.K. Purwar H. Qu J. Rak A. Rakotozafindrabe 2 I. Ravinovich K.F. Read S. Rembeczki M. Reuter K. Reygers V. Riabov Y. Riabov D. Roach G. Roche 5 S.D. Rolnick A. Romana 2 M. Rosati S.S.E. Rosendahl P. Rosnet 5 P. Rukoyatkin P. Ruzicka V.L. Rykov B. Sahlmueller N. Saito T. Sakaguchi S. Sakai K. Sakashita H. Sakata V. Samsonov S. Sato T. Sato S. Sawada K. Sedgwick J. Seele R. Seidl A.Yu. Semenov V. Semenov R. Seto D. Sharma I. Shein A. Shevel T.-A. Shibata K. Shigaki M. Shimomura K. Shoji P. Shukla A. Sickles C.L. Silva D. Silvermyr C. Silvestre 3 K.S. Sim B.K. Singh C.P. Singh V. Singh S. Skutnik M. Slunecka A. Soldatov R.A. Soltz W.E. Sondheim S.P. Sorensen I.V. Sourikova F. Staley 3 P.W. Stankus E. Stenlund M. Stepanov A. Ster S.P. Stoll T. Sugitate C. Suire 4 A. Sukhanov J. Sziklai T. Tabaru S. Takagi E.M. Takagui A. Taketani R. Tanabe Y. Tanaka K. Tanida M.J. Tannenbaum A. Taranenko P. Tarjan H. Themann T.L. Thomas M. Togawa A. Toia J. Tojo L. Tomasek Y. Tomita H. Torii R.S. Towell V.-N. Tram 2 I. Tserruya Y. Tsuchimoto C. Vale H. Valle H.W. van Hecke A. Veicht J. Velkovska R. Vertesi A.A. Vinogradov M. Virius V. Vrba E. Vznuzdaev M. Wagner D. Walker X.R. Wang Y. Watanabe F. Wei J. Wessels S.N. White D. Winter C.L. Woody M. Wysocki W. Xie Y.L. Yamaguchi K. Yamaura R. Yang A. Yanovich Z. Yasin J. Ying S. Yokkaichi G.R. Young I. Younus I.E. Yushmanov W.A. Zajc O. Zaudtke C. Zhang S. Zhou J. Zimanyi L. Zolin
Abstract : It has been postulated that partonic orbital angular momentum can lead to a significant double-helicity dependence in the net transverse momentum of Drell-Yan dileptons produced in longitudinally polarized p+p collisions. Analogous effects are also expected for dijet production. If confirmed by experiment, this hypothesis, which is based on semi-classical arguments, could lead to a new approach for studying the contributions of orbital angular momentum to the proton spin. We report the first measurement of the double-helicity dependence of the dijet transverse momentum in longitudinally polarized p+p collisions at sqrt(s) = 200 GeV from data taken by the PHENIX experiment in 2005 and 2006. The analysis deduces the transverse momentum of the dijet from the widths of the near- and far-side peaks in the azimuthal correlation of the dihadrons. When averaged over the transverse momentum of the triggered particle, the difference of the root-mean-square of the dijet transverse momentum between like- and unlike-helicity collisions is found to be -37 +/- 88(stat) +/- 14(syst) MeV/c.
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Submitted on : Tuesday, November 2, 2010 - 11:46:50 AM
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  • HAL Id : in2p3-00531268, version 1
  • ARXIV : 0910.1029

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A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Double Helicity Dependence of Jet Properties from Dihadrons in Longitudinally Polarized p+p Collisions at sqrt(s) = 200 GeV. Physical Review D, American Physical Society, 2010, 81, pp.012002. ⟨in2p3-00531268⟩

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