Suppression of back-to-back hadron pairs at forward rapidity in d+Au collisions at √s(NN)=200 GeV.

نویسندگان

  • A Adare
  • S Afanasiev
  • C Aidala
  • N N Ajitanand
  • Y Akiba
  • H Al-Bataineh
  • J Alexander
  • A Angerami
  • K Aoki
  • N Apadula
  • Y Aramaki
  • E T Atomssa
  • R Averbeck
  • T C Awes
  • B Azmoun
  • V Babintsev
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  • G Baksay
  • L Baksay
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  • B Bassalleck
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  • S Bathe
  • V Baublis
  • C Baumann
  • A Bazilevsky
  • S Belikov
  • R Belmont
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  • A Berdnikov
  • Y Berdnikov
  • J H Bhom
  • D S Blau
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  • K Boyle
  • M L Brooks
  • H Buesching
  • V Bumazhnov
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  • S Butsyk
  • S Campbell
  • A Caringi
  • C-H Chen
  • C Y Chi
  • M Chiu
  • I J Choi
  • J B Choi
  • R K Choudhury
  • P Christiansen
  • T Chujo
  • P Chung
  • O Chvala
  • V Cianciolo
  • Z Citron
  • B A Cole
  • Z Conesa del Valle
  • M Connors
  • M Csanád
  • T Csörgo
  • T Dahms
  • S Dairaku
  • I Danchev
  • K Das
  • A Datta
  • G David
  • M K Dayananda
  • A Denisov
  • A Deshpande
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  • K V Dharmawardane
  • O Dietzsch
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  • A Drees
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  • J M Durham
  • A Durum
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  • L D'Orazio
  • S Edwards
  • Y V Efremenko
  • F Ellinghaus
  • T Engelmore
  • A Enokizono
  • H En'yo
  • S Esumi
  • B Fadem
  • D E Fields
  • M Finger
  • M Finger
  • F Fleuret
  • S L Fokin
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  • A Franz
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  • A Glenn
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  • G Grim
  • M Grosse Perdekamp
  • T Gunji
  • H-Å Gustafsson
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  • K I Hahn
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  • T Nakamura
  • K Nakano
  • S Nam
  • J Newby
  • M Nguyen
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  • C Oakley
  • E O'Brien
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  • C A Ogilvie
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  • R Pak
  • V Pantuev
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  • I H Park
  • S K Park
  • W J Park
  • S F Pate
  • H Pei
  • J-C Peng
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  • D Yu Peressounko
  • R Petti
  • C Pinkenburg
  • R P Pisani
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  • R A Soltz
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  • T Sugitate
  • A Sukhanov
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  • K Tanida
  • M J Tannenbaum
  • S Tarafdar
  • A Taranenko
  • H Themann
  • D Thomas
  • T L Thomas
  • M Togawa
  • A Toia
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  • Y Tsuchimoto
  • C Vale
  • H Valle
  • H W van Hecke
  • E Vazquez-Zambrano
  • A Veicht
  • J Velkovska
  • R Vértesi
  • M Virius
  • V Vrba
  • E Vznuzdaev
  • X R Wang
  • D Watanabe
  • K Watanabe
  • Y Watanabe
  • F Wei
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  • J Wessels
  • S N White
  • D Winter
  • C L Woody
  • R M Wright
  • M Wysocki
  • Y L Yamaguchi
  • K Yamaura
  • R Yang
  • A Yanovich
  • J Ying
  • S Yokkaichi
  • Z You
  • G R Young
  • I Younus
  • I E Yushmanov
  • W A Zajc
  • S Zhou
  • L Zolin
چکیده

Back-to-back hadron pair yields in d+Au and p+p collisions at √s(NN)=200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity |η|<0.35 and the associated hadron at forward rapidity (deuteron direction, 3.0<η<3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d+Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p+p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, p(T), and η points to cold nuclear matter effects arising at high parton densities.

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عنوان ژورنال:
  • Physical review letters

دوره 107 17  شماره 

صفحات  -

تاریخ انتشار 2011