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Yunhan Ma. Picture.

Yunhan Ma

Yunhan Ma, visitng researcher

Yunhan Ma. Picture.

ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV


  • A. Adler
  • J. Adolfsson
  • S. Ahmad
  • X. Bai
  • S. Basu
  • M. A. Bhat
  • A. Bogdanov
  • P. Chakraborty
  • S. Chattopadhyay
  • C. H. Christensen
  • P. Christiansen
  • J. G. Contreras
  • F. Costa
  • D. Das
  • S. Das
  • S. Dash
  • S. De
  • Y. Ding
  • A. Dobrin
  • C. Gargiulo
  • S. K. Ghosh
  • A. Grigoryan
  • K. Gulbrandsen
  • A. Gupta
  • J. W. Harris
  • M. Inaba
  • M. S. Islam
  • T. Janson
  • A. M. Khan
  • S. Khan
  • B. Kim
  • D. Kim
  • D. Kim
  • H. Kim
  • J. S. Kim
  • J. S. Kim
  • S. Kim
  • M. K. Köhler
  • O. Kovalenko
  • J. Lee
  • S. Lee
  • X. L. Li
  • X. L. Li
  • J. Liu
  • J. A. Lopez
  • Y. G. Ma
  • S. M. Mahmood
  • Y. Mao
  • N. A. Martin
  • O. Matonoha
  • A. F. Nassirpour
  • B. S. Nielsen
  • J. Nystrand
  • A. Ohlson
  • A. Ortiz Velasquez
  • A. Oskarsson
  • J. Pan
  • J. Park
  • X. Peng
  • S. Perrin
  • J. Rak
  • T. Richert
  • M. Richter
  • P. Roy
  • S. K. Saha
  • S. K. Saha
  • S. Sahoo
  • M. Schmidt
  • M. Schmidt
  • N. V. Schmidt
  • J. E. Seger
  • A. Sharma
  • M. Sharma
  • S. Sharma
  • A. I. Sheikh
  • D. Silvermyr
  • B. Singh
  • R. Singh
  • V. K. Singh
  • J. Song
  • S. Sorensen
  • D. Thomas
  • V. Vislavicius
  • B. Wagner
  • M. Weber
  • J. P. Wessels
  • Y. Wu
  • S. Yang
  • Z. Yin
  • S. Yuan
  • S. Zhang
  • X. Zhang
  • Y. Zhang
  • Y. Zhou
  • J. Zhu
  • Y. Zhu

Summary, in English

The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer of the ALICE detector at the LHC. The yields as well as the nuclear modification factors are determined in the forward rapidity region 2.5<y<4.0, as a function of rapidity, transverse momentum and collision centrality. The results show that the production of the ϒ(1S) meson is suppressed by a factor of about three with respect to the production in proton–proton collisions. For the first time, a significant signal for the ϒ(2S) meson is observed at forward rapidity, indicating a suppression stronger by about a factor 2–3 with respect to the ground state. The measurements are compared with transport, hydrodynamic, comover and statistical hadronisation model calculations.


  • Lund University
  • Department of Physics
  • Division of Translational Cancer Research

Publishing year





Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics



Document type

Journal article




  • Subatomic Physics




  • ISSN: 0370-2693