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Centrality determination in heavy-ion collisions with the LHCb detector

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Abstract The centrality of heavy-ion collisions is directly related to the created medium in these interactions. A procedure to determine the centrality of collisions with the LHCb detector is implemented for lead-lead collisions at √s NN = 5 TeV and lead-neon fixed-target collisions at √s NN = 69 GeV. The energy deposits in the electromagnetic calorimeter are used to determine and define the centrality classes. The correspondence between the number of participants and the centrality for the lead-lead collisions is in good agreement with the correspondence found in other experiments, and the centrality measurements for the lead-neon collisions presented here are performed for the first time in fixed-target collisions at the LHC.
IOP Publishing
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Poslavskii K. Prasanth L. Promberger C. Prouve V. Pugatch H. Pullen G. Punzi W. Qian J. Qin R. Quagliani B. Quintana N.V. Raab R.I. Rabadan Trejo B. Rachwal J.H. Rademacker M. Rama M. Ramos Pernas M.S. Rangel F. Ratnikov G. Raven M. Reboud F. Redi F. Reiss C. Remon Alepuz Z. Ren V. Renaudin R. Ribatti S. Ricciardi K. Rinnert P. Robbe G. Robertson A.B. Rodrigues E. Rodrigues J.A. Rodriguez Lopez A. Rollings P. Roloff V. Romanovskiy M. Romero Lamas A. Romero Vidal J.D. Roth M. Rotondo M.S. Rudolph T. Ruf J. Ruiz Vidal A. Ryzhikov J. Ryzka J.J. Saborido Silva N. Sagidova N. Sahoo B. Saitta M. Salomoni C. Sanchez Gras R. Santacesaria C. Santamarina Rios M. Santimaria E. Santovetti D. Saranin G. Sarpis M. Sarpis A. Sarti C. Satriano A. Satta M. Saur D. Savrina H. Sazak L.G. Scantlebury Smead S. Schael M. Schellenberg M. Schiller H. Schindler M. Schmelling B. Schmidt O. Schneider A. Schopper M. Schubiger S. Schulte M.H. Schune R. Schwemmer B. Sciascia S. Sellam A. Semennikov M. 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Uwer A. Vagner V. Vagnoni A. Valassi G. Valenti N. Valls Canudas M. van Beuzekom M. Van Dijk E. van Herwijnen C.B. Van Hulse M. van Veghel R. Vazquez Gomez P. Vazquez Regueiro C. Vázquez Sierra S. Vecchi J.J. Velthuis M. Veltri A. Venkateswaran M. Veronesi M. Vesterinen D. Vieira M. Vieites Diaz H. Viemann X. Vilasis-Cardona E. Vilella Figueras P. Vincent D. Vom Bruch A. Vorobyev V. Vorobyev N. Voropaev R. Waldi J. Walsh C. Wang J. Wang J. Wang J. Wang J. Wang M. Wang R. Wang Y. Wang Z. Wang Z. Wang H.M. Wark N.K. Watson S.G. Weber D. Websdale C. Weisser B.D.C. Westhenry D.J. White M. Whitehead D. Wiedner G. Wilkinson M. Wilkinson I. Williams M. Williams M.R.J. Williams F.F. Wilson W. Wislicki M. Witek L. Witola G. Wormser S.A. Wotton H. Wu K. Wyllie Z. Xiang D. Xiao Y. Xie A. Xu J. Xu L. Xu M. Xu Q. Xu Z. Xu Z. Xu D. Yang S. Yang Y. Yang Z. Yang Z. Yang Y. Yao L.E. Yeomans H. Yin J. Yu X. Yuan O. Yushchenko E. Zaffaroni M. Zavertyaev M. Zdybal O. Zenaiev M. Zeng D. Zhang L. Zhang S. 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Title: Centrality determination in heavy-ion collisions with the LHCb detector
Description:
Abstract The centrality of heavy-ion collisions is directly related to the created medium in these interactions.
A procedure to determine the centrality of collisions with the LHCb detector is implemented for lead-lead collisions at √s NN = 5 TeV and lead-neon fixed-target collisions at √s NN = 69 GeV.
The energy deposits in the electromagnetic calorimeter are used to determine and define the centrality classes.
The correspondence between the number of participants and the centrality for the lead-lead collisions is in good agreement with the correspondence found in other experiments, and the centrality measurements for the lead-neon collisions presented here are performed for the first time in fixed-target collisions at the LHC.

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