Nuclear-modification factor for open-heavy-flavor production at forward rapidity in Cu plus Cu collisions at root s(NN)=200 GeV

Research output: Contribution to journalArticle

Abstract

Background: Heavy-flavor production in p + p collisions is a good test of perturbative-quantum-chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions relative to binary-collision scaling from p + p results, quantified with the nuclear-modification factor (R-AA), provides information on both cold-and hot-nuclear-matter effects. Midrapidity heavy-flavor R-AA measurements at the Relativistic Heavy Ion Collider have challenged parton-energy-loss models and resulted in upper limits on the viscosity-entropy ratio that are near the quantum lower bound. Such measurements have not been made in the forward-rapidity region. Purpose: Determine transverse-momentum (p(T)) spectra and the corresponding R-AA for muons from heavy-flavor meson decay in p + p and Cu + Cu collisions at root s(NN) = 200 GeV and y = 1.65. Method: Results are obtained using the semileptonic decay of heavy-flavor mesons into negative muons. The PHENIX muon-arm spectrometers measure the p(T) spectra of inclusive muon candidates. Backgrounds, primarily due to light hadrons, are determined with a Monte Carlo calculation using a set of input hadron distributions tuned to match measured-hadron distributions in the same detector and statistically subtracted. Results: The charm-production cross section in p + p collisions at root s = 200 GeV, integrated over p(T) and in the rapidity range 1.4 < y < 1.9, is found to be d(sigma e (e) over bar)/dy = 0.139 +/- 0.029 (stat)(-0.058)(+0.051) (syst) mb. This result is consistent with a perturbative fixed-order-plus-next-to-leading-log calculation within scale uncertainties and is also consistent with expectations based on the corresponding midrapidity charm-production cross section measured by PHENIX. The R-AA for heavy-flavor muons in Cu + Cu collisions is measured in three centrality bins for 1 < p(T) < 4 GeV/c. Suppression relative to binary-collision scaling (R-AA < 1) increases with centrality. Conclusions: Within experimental and theoretical uncertainties, the measured charm yield in p + p collisions is consistent with state-of-the-art pQCD calculations. Suppression in central Cu + Cu collisions suggests the presence of significant cold-nuclear-matter effects and final-state energy loss.

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  • A. Adare
  • S. Afanasiev
  • C. Aidala
  • N. N. Ajitanand
  • Y. Akiba
  • H. Al-Bataineh
  • J. Alexander
  • K. Aoki
  • L. Aphecetche
  • R. Armendariz
  • S. H. Aronson
  • J. Asai
  • E. T. Atomssa
  • R. Averbeck
  • T. C. Awes
  • B. Azmoun
  • V. Babintsev
  • G. Baksay
  • L. Baksay
  • A. Baldisseri
  • K. N. Barish
  • P. D. Barnes
  • B. Bassalleck
  • S. Bathe
  • S. Batsouli
  • V. Baublis
  • A. Bazilevsky
  • S. Belikov
  • R. Bennett
  • Y. Berdnikov
  • A. A. Bickley
  • J. G. Boissevain
  • H. Borel
  • K. Boyle
  • M. L. Brooks
  • H. Buesching
  • V. Bumazhnov
  • G. Bunce
  • S. Butsyk
  • S. Campbell
  • B. S. Chang
  • J. -L. Charvet
  • S. Chernichenko
  • C. Y. Chi
  • J. Chiba
  • M. Chiu
  • I. J. Choi
  • T. Chujo
  • P. Chung
  • A. Churyn
  • V. Cianciolo
  • C. R. Cleven
  • B. A. Cole
  • M. P. Comets
  • P. Constantin
  • M. Csanad
  • T. Csoergo
  • T. Dahms
  • K. Das
  • G. David
  • M. B. Deaton
  • K. Dehmelt
  • H. Delagrange
  • A. Denisov
  • D. d'Enterria
  • A. Deshpande
  • E. J. Desmond
  • O. Dietzsch
  • A. Dion
  • M. Donadelli
  • O. Drapier
  • A. Drees
  • A. K. Dubey
  • A. Durum
  • V. Dzhordzhadze
  • Y. V. Efremenko
  • J. Egdemir
  • F. Ellinghaus
  • W. S. Emam
  • A. Enokizono
  • H. En'yo
  • S. Esumi
  • K. O. Eyser
  • D. E. Fields
  • M. Finger
  • M. Jr. Finger
  • F. Fleuret
  • S. L. Fokin
  • Z. Fraenkel
  • J. E. Frantz
  • A. Franz
  • A. D. Frawley
  • K. Fujiwara
  • Y. Fukao
  • T. Fusayasu
  • S. Gadrat
  • A. Garishvili
  • I. Garishvili
  • A. Glenn
  • H. Gong
  • M. Gonin
  • J. Gosset
  • Y. Goto
  • R. Granier de Cassagnac
  • N. Grau
  • S. V. Greene
  • M. Grosse Perdekamp
  • T. Gunji
  • Hans-Åke Gustafsson
  • T. Hachiya
  • A. Hadj Henni
  • C. Haegemann
  • J. S. Haggerty
  • H. Hamagaki
  • R. Han
  • H. Harada
  • E. P. Hartouni
  • K. Haruna
  • Eva Haslum
  • R. Hayano
  • X. He
  • M. Heffner
  • T. K. Hemmick
  • T. Hester
  • H. Hiejima
  • J. C. Hill
  • R. Hobbs
  • M. Hohlmann
  • W. Holzmann
  • K. Homma
  • B. Hong
  • T. Horaguchi
  • D. Hornback
  • T. Ichihara
  • H. Iinuma
  • K. Imai
  • M. Inaba
  • Y. Inoue
  • D. Isenhower
  • L. Isenhower
  • M. Ishihara
  • T. Isobe
  • M. Issah
  • A. Isupov
  • B. V. Jacak
  • J. Jia
  • J. Jin
  • O. Jinnouchi
  • B. M. Johnson
  • K. S. Joo
  • D. Jouan
  • F. Kajihara
  • S. Kametani
  • N. Kamihara
  • J. Kamin
  • M. Kaneta
  • J. H. Kang
  • H. Kanou
  • D. Kawall
  • A. V. Kazantsev
  • A. Khanzadeev
  • J. Kikuchi
  • D. H. Kim
  • D. J. Kim
  • E. Kim
  • E. Kinney
  • A. Kiss
  • E. Kistenev
  • A. Kiyomichi
  • J. Klay
  • C. Klein-Boesing
  • L. Kochenda
  • V. Kochetkov
  • B. Komkov
  • M. Konno
  • D. Kotchetkov
  • A. Kozlov
  • A. Kral
  • A. Kravitz
  • J. Kubart
  • G. J. Kunde
  • N. Kurihara
  • K. Kurita
  • M. J. Kweon
  • Y. Kwon
  • G. S. Kyle
  • R. Lacey
  • Y. S. Lai
  • J. G. Lajoie
  • A. Lebedev
  • D. M. Lee
  • M. K. Lee
  • T. Lee
  • M. J. Leitch
  • M. A. L. Leite
  • B. Lenzi
  • X. Li
  • T. Liska
  • A. Litvinenko
  • M. X. Liu
  • B. Love
  • D. Lynch
  • C. F. Maguire
  • Y. I. Makdisi
  • A. Malakhov
  • M. D. Malik
  • V. I. Manko
  • Y. Mao
  • L. Masek
  • H. Masui
  • F. Matathias
  • M. McCumber
  • P. L. McGaughey
  • Y. Miake
  • P. Mikes
  • K. Miki
  • T. E. Miller
  • A. Milov
  • S. Mioduszewski
  • M. Mishra
  • J. T. Mitchell
  • M. Mitrovski
  • A. Morreale
  • D. P. Morrison
  • T. V. Moukhanova
  • D. Mukhopadhyay
  • J. Murata
  • S. Nagamiya
  • Y. Nagata
  • J. L. Nagle
  • M. Naglis
  • I. Nakagawa
  • Y. Nakamiya
  • T. Nakamura
  • K. Nakano
  • J. Newby
  • M. Nguyen
  • B. E. Norman
  • R. Nouicer
  • A. S. Nyanin
  • E. O'Brien
  • S. X. Oda
  • C. A. Ogilvie
  • H. Ohnishi
  • M. Oka
  • K. Okada
  • O. O. Omiwade
  • 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
  • V. Peresedov
  • D. Yu. Peressounko
  • C. Pinkenburg
  • M. L. Purschke
  • A. K. Purwar
  • H. Qu
  • J. Rak
  • A. Rakotozafindrabe
  • I. Ravinovich
  • K. F. Read
  • S. Rembeczki
  • M. Reuter
  • K. Reygers
  • V. Riabov
  • Y. Riabov
  • G. Roche
  • A. Romana
  • M. Rosati
  • Sarah Rosendahl
  • P. Rosnet
  • P. Rukoyatkin
  • V. L. Rykov
  • B. Sahlmueller
  • N. Saito
  • T. Sakaguchi
  • S. Sakai
  • H. Sakata
  • V. Samsonov
  • S. Sato
  • S. Sawada
  • J. Seele
  • R. Seidl
  • V. Semenov
  • R. Seto
  • D. Sharma
  • I. Shein
  • A. Shevel
  • T. -A. Shibata
  • K. Shigaki
  • M. Shimomura
  • K. Shoji
  • A. Sickles
  • C. L. Silva
  • D. Silvermyr
  • C. Silvestre
  • K. S. Sim
  • 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
  • P. W. Stankus
  • M. Stepanov
  • A. Ster
  • S. P. Stoll
  • T. Sugitate
  • C. Suire
  • J. Sziklai
  • T. Tabaru
  • S. Takagi
  • E. M. Takagui
  • A. Taketani
  • Y. Tanaka
  • K. Tanida
  • M. J. Tannenbaum
  • A. Taranenko
  • P. Tarjan
  • T. L. Thomas
  • M. Togawa
  • A. Toia
  • J. Tojo
  • L. Tomasek
  • H. Torii
  • R. S. Towell
  • V-N. Tram
  • I. Tserruya
  • Y. Tsuchimoto
  • C. Vale
  • H. Valle
  • H. W. van Hecke
  • J. Velkovska
  • R. Vertesi
  • A. A. Vinogradov
  • M. Virius
  • V. Vrba
  • E. Vznuzdaev
  • M. Wagner
  • D. Walker
  • X. R. Wang
  • Y. Watanabe
  • J. Wessels
  • S. N. White
  • D. Winter
  • C. L. Woody
  • M. Wysocki
  • W. Xie
  • Y. L. Yamaguchi
  • 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
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
JournalPhysical Review C (Nuclear Physics)
Volume86
Issue number2
Publication statusPublished - 2012
Publication categoryResearch
Peer-reviewedYes

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