Neutral pion and $\eta$ meson production at mid-rapidity in Pb–Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV

Shreyasi Acharya,Yosuke Watanabe,Gabor Biro,Monika Varga-kofarago,Richard Daniel Majka,S. G. Weber,Marco Bregant,Gvozden Neskovic,Massimiliano Marchisone,Pierre Vande Vyvre,Katie Leanne Graham,Piotr Jan Gasik,Mirko Planinic,Valeriy Pozdniakov,Esther Bartsch,Mario Fusco Girard,Francesca Soramel,Artem Shangaraev,Torsten Alt,Rashmi Raniwala,Franco Meddi,Claudiu Cornel Schiaua,Katherin Shtejer Diaz,Xiaoming Zhang,Christian Claude Kuhn,Charalampos Kouzinopoulos,Guy Paic,Roberto Preghenella,Christian Holm Christensen,Pascal Dupieux,Mikolaj Krzewicki,Caterina Deplano,Jeremy John Wilkinson,Alberto Caliva,Matteo Lupi,Lennart Vincent Van Doremalen,Ketil Roeed,Laurent Bernard Aphecetche,Sandun Pahula Hewage,Erin Frances Gauger,Chiara Oppedisano,Konstantin Munning,Sven Gotovac,Svetlana Kushpil,Paul Stankus,Hans Martin Ljunggren,Zaida Conesa del Valle,Vladimir Kovalenko,Rafael Peretti Pezzi,Silvia Delsanto,Yasser Corrales Morales,Ernst Hellbar,Federico Cindolo,Janusz Oleniacz,Mattia Faggin,Marco van Leeuwen,Zabulon Vilakazi,Alexander Vodopyanov,Victor Jose Gaston Feuillard,Sergio Arturo Iga Buitron,Maria Nicassio,Dmitry Budnikov,Lucas Altenkamper,Pietro Antonioli,Ernesto Calvo Villar,Naghmeh Mohammadi,Mikhail Malaev,Sidharth Kumar Prasad,Werner Riegler,Stefano Trogolo,Ulrich Michael Frankenfeld,Roberta Arnaldi,David Olle Rickard Silvermyr,J. Bhom,Andrei Ionut Herghelegiu,Philipp Johannes Luettig,Fatiha Lehas,Roman Lavicka,Radiy Ilkaev,Astrid Morreale,Nicole Bastid,Stefano Bagnasco,Preeti Dhankher,Kjetil Ullaland,Henrique Jose Correa Zanoli,Antonio Carlos Oliveira Da Silva,Amalia Pop,Rinaldo Rui,Erwann Masson,Zubayer Ahammed,Dong Jo Kim,Maximiliano Puccio,Tomas Wilhelm Snellman,Massimo Angeletti,Daniel Berenyi,Nur Hussain,Sergey Kiselev,Zhang Chunhui,Manuel Guittiere,Rihan Haque,Dirk Hutter,Sudipan De,Jin Hee Yoon,Se Yong Kim,Malgorzata Anna Janik,Rachid Guernane,Kunal Garg,Xinye Peng,Sergio Vergara Limon,Pranjal Sarma,Krzysztof Redlich,Yong-Wook Baek,Sanjeev Singh Sambyal,Jorn Henning Putschke,Leticia Cunqueiro Méndez,Alberica Toia,Catia Petta,Sergey Gorbunov,Valerie Ramillien Barret,Kosei Yamakawa,Andres Sanchez Gonzalez,Laszlo Olah,Manuel Colocci,Rune Langoy,Ralf Keidel,Ara Grigoryan,Miljenko Suljic,Oeystein Djuvsland,Trine Spedstad Tveter,Mario Kruger,Jonatan Adolfsson,Priyanka Sett,Boris Batyunya,Raffaele Grosso,Luis Alberto Perez Moreno,Alex Chauvin,Andrew Michael Kubera,Anastasia Maria Barbano,Mario Sitta,Luciano Musa,Sandeep Dudi,Jiří Mareš,Boris Hippolyte,Guillaume Batigne,Somnath Kar,Florian Herrmann,Michael Annan Lisa,Jorge Mercado-Perez,Andrey Reshetin,Federico Antinori,Rudiger Haake,Peter Levai,Adam Wegrzynek,Benedetto Di Ruzza,Laurent Ducroux,Horst Sebastian Scheid,Kohei Terasaki,Jiyoung Kim,Jasper Van Der Maarel,Catalin-lucian Ristea,Edith Zinhle Buthelezi,Rishat Sultanov,Sandra Moretto,Audrey Francisco,Alwina Liu,Eugenio Scapparone,Marek Bombara,Cvetan Valeriev Cheshkov,Kai Oliver Schweda,Volodymyr Yurchenko,Gergely Gabor Barnafoldi,Youngil Kwon,Jinsook Kim,Annalisa Mastroserio,Kenta Shigaki,Vytautas Vislavicius,Gianluca Aglieri Rinella,Johan Alme,Eulogio Serradilla Rodriguez,Akihide Nobuhiro,Jeremi Niedziela,Hyeonjoong Kim,Ombretta Pinazza,Andrzej Deloff,Thomas Peitzmann,Andre Mischke,Robert Helmut Munzer,Supriya Das,Barthelemy Von Haller,Irais Bautista Guzman,Gianluca Usai,Dimitra Andreou,Artur Furs,Jacobus Willem Van Hoorne,Claude Andre Pruneau,Jan Musinsky,Petra Loncar,Kirill Voloshin,Mallick Dukhishyam,Patrick Simon Reichelt,Marian Krivda,H. Hamagaki,Jaroslav Bielcik,Christoph Blume,Madalina-gabriela Tarzila,Jan Rak,Michal Meres,Alberto Collu,Bernhard Hohlweger,Eun-Joo Kim,Maciej Slupecki,Pooja Pareek,Mohd Danish Azmi,Chiara Zampolli,Ján Jadlovský,Lucia Leardini,Elena Rogochaya,Soren Pontoppidan Sorensen,Jan Fiete Grosse-oetringhaus,Marek Kowalski,Corrado Cicalo,Giuseppe Trombetta,Boris Teyssier,Nicola Bianchi,Christoph Mayer,Jianhui Zhu,Marcello Borri,Hermann Franz Degenhardt,Dmitry Finogeev,Sergey Shirinkin,Peter Chochula,Chiara Bianchin,Julien Faivre,Omar Vazquez Rueda,Bernhard Skaali,Ritsuya Hosokawa,Paola La Rocca,Venelin Anguelov,Janka Vrlakova,Iwona Anna Sputowska,Brennan Schaefer,Darius Laurens Keijdener,Alla Maevskaya,Sergey Evdokimov,Hikari Murakami,Arvind Khuntia,Sumit Basu,Alexander Deisting,Barbara Jacak,Elisa Meninno,Mais Kazim Oglu Suleymanov,Sanjay Kumar Ghosh,Pragati Sahoo,Cristian Andrei,Alexey Kuryakin,Boris Wagner,Andrea Festanti,Felix Reidt,Sonia Rajput,Yury Ryabov,Raphaelle Marie Bailhache,Peter Graham Jones,Fedor Guber,Yury Pestov,Serhiy Senyukov,Evgeny Kondratyuk,Tinku Sarkar Sinha,Sergey Filchagin,Francesco Barile,Auro Prasad Mohanty,Sergey Voloshin,Ernesto Lopez Torres,B. Audurier,Vladyslav Litichevskyi,M. M. Mieskolainen,Grigorii Feofilov,Indranil Das,Christopher Hills,Mario Iván Martínez Hernández,Hushnud Hushnud,Serpil Yalcin,Gustavo Conesa Balbastre,Christian Bourjau,Carlos Duarte Galvan,Ewa Gladysz-Dziadus,Evert Anders Stenlund,Ejiro Naomi Umaka,Martin U. Schmidt,Roberto Divia,Amrendra Narayan,Mauro Gallio,Jacobus Onderwaater,Xiaowen Ren,Camilo Ernesto Lara Martinez,Oleg Karavichev,Kirill Lapidus,Jens Robert Luhder,Inayat Rasool Bhat,Iouri Belikov,Danilo Vranic,David Horak,Giacinto De Cataldo,Varlen Grabski,James S. Harris,Cristina Bedda,Martin Poghosyan,Oleksandr Kovalenko,Valentina Zaccolo,Michal Sefcik,Gennady Zinovjev,Raghunath Sahoo,Peter Martin Jacobs,Antonio Ortiz Velasquez,Fabio Filippo Colamaria,Guido Alexander Willems,Philippe Pillot,Taesoo Kim,Johann Zmeskal,Renu Bala,Olja Dordic,Mesut Arslandok,Stefania Beole,S. 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Neutral pion and $\eta$ meson production at mid-rapidity in Pb–Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV

2018

Neutral pion and η meson production in the transverse momentum range 1 Large Hadron Collider (LHC) in central and semicentral Pb-Pb collisions at √sNN = 2.76 TeV. These results were obtained using the photon conversion method as well as the Photon Spectrometer (PHOS) and Electromagnetic Calorimeter detectors. The results extend the upper pT reach of the previous ALICE π0 measurements from 12 to 20 GeV/c and present the first measurement of η meson production in heavy-ion collisions at the LHC. The η/π0 ratio is similar for the two centralities and reaches at high pT a plateau value of 0.457 ± 0.013stat ± 0.018syst. A suppression of similar magnitude for π0 and η meson production is observed in Pb-Pb collisions with respect to their production in pp collisions scaled by the number of binary nucleon-nucleon collisions. We discuss the results in terms of Next to Leading Order (NLO) pQCD predictions and hydrodynamic models. The measurements show a stronger suppression than observed at lower center-of-mass energies in the pT range 6

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