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Measurement of Long-Range Angular Correlation and Quadrupole Anisotropy of Pions and (Anti)Protons in Central d+Au Collisions at sqrt[s_{NN}]=200 GeV.

Adare, A; Aidala, C; Ajitanand, N N; Akiba, Y; Akimoto, R; Al-Bataineh, H; Al-Ta'ani, H; Alexander, J; Andrews, K R and Angerami, A, et al. (2015) In Physical Review Letters 114(19).
Abstract
We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers in central d+Au and minimum bias p+p collisions at sqrt[s_{NN}]=200 GeV. The charged hadron is measured at midrapidity |η|<0.35, and the energy is measured at large rapidity (-3.7<η<-3.1, Au-going direction). An enhanced near-side angular correlation across |Δη|>2.75 is observed in d+Au collisions. Using the event plane method applied to the Au-going energy distribution, we extract the anisotropy strength v_{2} for inclusive charged hadrons at midrapidity up to p_{T}=4.5 GeV/c. We also present the measurement of v_{2} for identified π^{±} and (anti)protons in central d+Au collisions, and observe a mass-ordering pattern... (More)
We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers in central d+Au and minimum bias p+p collisions at sqrt[s_{NN}]=200 GeV. The charged hadron is measured at midrapidity |η|<0.35, and the energy is measured at large rapidity (-3.7<η<-3.1, Au-going direction). An enhanced near-side angular correlation across |Δη|>2.75 is observed in d+Au collisions. Using the event plane method applied to the Au-going energy distribution, we extract the anisotropy strength v_{2} for inclusive charged hadrons at midrapidity up to p_{T}=4.5 GeV/c. We also present the measurement of v_{2} for identified π^{±} and (anti)protons in central d+Au collisions, and observe a mass-ordering pattern similar to that seen in heavy-ion collisions. These results are compared with viscous hydrodynamic calculations and measurements from p+Pb at sqrt[s_{NN}]=5.02 TeV. The magnitude of the mass ordering in d+Au is found to be smaller than that in p+Pb collisions, which may indicate smaller radial flow in lower energy d+Au collisions. (Less)
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Physical Review Letters
volume
114
issue
19
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American Physical Society
external identifiers
  • pmid:26024164
  • wos:000354363600005
  • scopus:84930505330
ISSN
1079-7114
DOI
10.1103/PhysRevLett.114.192301
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English
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6533bad0-2b9e-4493-94ea-8874cf733b73 (old id 5436356)
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2015-06-23 23:18:38
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@article{6533bad0-2b9e-4493-94ea-8874cf733b73,
  abstract     = {We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers in central d+Au and minimum bias p+p collisions at sqrt[s_{NN}]=200 GeV. The charged hadron is measured at midrapidity |η|&lt;0.35, and the energy is measured at large rapidity (-3.7&lt;η&lt;-3.1, Au-going direction). An enhanced near-side angular correlation across |Δη|&gt;2.75 is observed in d+Au collisions. Using the event plane method applied to the Au-going energy distribution, we extract the anisotropy strength v_{2} for inclusive charged hadrons at midrapidity up to p_{T}=4.5 GeV/c. We also present the measurement of v_{2} for identified π^{±} and (anti)protons in central d+Au collisions, and observe a mass-ordering pattern similar to that seen in heavy-ion collisions. These results are compared with viscous hydrodynamic calculations and measurements from p+Pb at sqrt[s_{NN}]=5.02 TeV. The magnitude of the mass ordering in d+Au is found to be smaller than that in p+Pb collisions, which may indicate smaller radial flow in lower energy d+Au collisions.},
  articleno    = {192301},
  author       = {Adare, A and Aidala, C and Ajitanand, N N and Akiba, Y and Akimoto, R and Al-Bataineh, H and Al-Ta'ani, H and Alexander, J and Andrews, K R and Angerami, A and Aoki, K and Apadula, N and Appelt, E and Aramaki, Y and Armendariz, R and Aschenauer, E C and Atomssa, E T and Averbeck, R and Awes, T C and Azmoun, B and Babintsev, V and Bai, M and Baksay, G and Baksay, L and Bannier, B and Barish, K N and Bassalleck, B and Basye, A T and Bathe, S and Baublis, V and Baumann, C and Bazilevsky, A and Belikov, S and Belmont, R and Ben-Benjamin, J and Bennett, R and Bhom, J H and Blau, D S and Bok, J S and Boyle, K and Brooks, M L and Broxmeyer, D and Buesching, H and Bumazhnov, V and Bunce, G and Butsyk, S and Campbell, S and Caringi, A and Castera, P and Chen, C-H and Chi, C Y and Chiu, M and Choi, I J and Choi, J B and Choudhury, R K and Christiansen, Peter and Chujo, T and Chung, P and Chvala, O and Cianciolo, V and Citron, Z and Cole, B A and Conesa Del Valle, Z and Connors, 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and Watanabe, K and Watanabe, Y and Watanabe, Y S and Wei, F and Wei, R and Wessels, J and White, S N and Winter, D and Woody, C L and Wright, R M and Wysocki, M and Yamaguchi, Y L and Yamaura, K and Yang, R and Yanovich, A and Ying, J and Yokkaichi, S and Yoo, J S and You, Z and Young, G R and Younus, I and Yushmanov, I E and Zajc, W A and Zelenski, A and Zhou, S},
  issn         = {1079-7114},
  language     = {eng},
  number       = {19},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Measurement of Long-Range Angular Correlation and Quadrupole Anisotropy of Pions and (Anti)Protons in Central d+Au Collisions at sqrt[s_{NN}]=200 GeV.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.114.192301},
  volume       = {114},
  year         = {2015},
}