Neutral pion and η meson production in proton–proton collisions at [formula omitted] and [formula omitted

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Giubellino,J Mercado Pérez,M Mastromarco,J Bán,A De Azevedo Moregula,G Aglieri Rinella,G Hamar,M Meres,J Nystrand,A Mischke,O Busch,H Borel,A Ferretti,Z Buthelezi,W Yu,F Baltasar Dos Santos Pedrosa,A Bilandzic,A Badalá ,P I Loenne ,Г Феофилов ,L Jirdén ,N P Naumov ,C Cicalò ,P L.m Podesta-Lerma ,J F Grosse-Oetringhaus ,P Strmeň ,B S Nielsen ,J P Wessels ,A Martínez Dávalos ,M Petriş ,J I Yi ,R A Ricci ,Don Vernekohl ,M G Poghosyan ,M Petráň ,A G Agocs ,G Lövhöiden ,I S Zgură ,P T Hille ,C Pruneau ,J F Castillo Hernandez ,D P Mahapatra ,S A Voloshin ,A B Kaǐdalov ,Alexander Kluge ,Nicolas Bock ,T J Humanic ,T K Nayak ,P G Kuijer ,A I Pavlinov ,Bikash Sinha ,C Soós ,D M Madagodahettige-Don ,R T Jimenez Bustamante ,S K Prasad ,J L Charvet ,A K Bhati ,A Adare ,R C Baral ,I E Yushmanov ,H R Schmidt ,C A Carrillo Montoya ,T B Skaali ,E M Fiore ,A Maŕın ,Ian Gardner Bearden ,S T Heckel ,E Mudnić ,M A Lisa ,L H González-Trueba ,G V Margagliotti ,Д И Паталаха ,M E Cotallo ,J D Tapia ∋Takaki ,Kenneth Francis Read ,P Braun‐Munzinger ,M D Azmi ,B K Nandi ,D B Piyarathna ,L D Hanratty ,S Böse ,V R Loggins ,R P Scharenberg ,M Mohisin Khan ,M L Knichel ,P Jacobs ,B H Han ,P H S Y Jayarathna ,A K Dutta Majumdar ,Y Schütz ,J H Kang ,G Romeo ,Y P Viyogi ,M K Köhler ,I C Arsene ,A K Dubey ,G S Pappalardo ,G M Urciuoli ,S Beolè ,E Belmont‐Moreno ,Kai Loo ,D A Moreira De Godoy ,L K Mangotra ,D D Chinellato ,P A Scott ,S Pochybová ,T S Tveter ,H H Dalsgaard ,B Sitár ,M J Kweon ,E García-Solis ,H.h Gutbrod ,T C Awes ,P G Jones ,J W Harris ,M A Mazzoni ,F Křížek ,I Léon Monźon ,Yongwook Baek ,T M Cormier ,Kristin Fanebust Hetland ,A Bøgdanov ,J Milošević ,B T Rascanu ,Sang Un Ahn ,A Öskarsson ,J Wiechuła ,W H Trzaska ,A A P Suaide ,G E Bruno ,E Gładysz-Dziaduś ,A R Timmins ,M Spyropoulou‐Stassinaki ,A M Gago ,D S Hwang ,G Martınez García ,Subrata Pal ,Aditya Nath Mishra ,B Srivastava ,А Виноградов ,M S Nilsson ,Xin Yuan ,J P Coffin ,J G Contreras ,M I Martínez ,Lee Stuart Barnby ,J J Gaardhøje ,D Røhr ,A De ,E G Ferreiro ,D Haşegan ,R A Fini ,G M Innocenti ,J S Réal ,Probir Roy ,M A S Figueredo ,A V Kazantsev ,L Jančurová ,P G Innocenti ,A Menchaca‐Rocha ,L Molnár ,Martin Girard ,Carlos A Salgado ,Raimond Snellings ,R A Soltz ,G L Usai ,H A Erdal ,E Sánchez ,M C S Williams ,С Сано ,A Gheaţă ,Matthias Richter ,C M Mitu ,F M Fionda ,G G Barnaföldi ,M R Cosentino ,J.‐Y Grossiord ,H J Jang ,H P Beck ,M Krůs ,D Berényi ,A K Mohanty ,J Král ,T S Räihä ,A R Reolon ,M A Janik ,D Vranić ,Z L Matthews ,D R Gangadharan ,Christoph Mayer ,B S Nilsen ,T Šuša ,S Khan ,S U Chung ,J H Thomas ,P K Sahu ,M G Munhoz ,V Cătănescu ,M A Subieta Vásquez ,D Mal’kevich ,M M Aggarwal ,E A R Casula ,K Šafařı́k ,Ji Eun Lee ,J L Klay ,Sami Sakari Rasanen

doi:10.1016/j.physletb.2012.09.015

Abstract

The first measurements of the invariant differential cross sections of inclusive π0 and η meson production at mid-rapidity in proton–proton collisions at s=0.9 TeV and s=7 TeV are reported. The π0 measurement covers the ranges 0.4<pT<7 GeV/c and 0.3<pT<25 GeV/c for these two energies, respectively. The production of η mesons was measured at s=7 TeV in the range 0.4<pT<15 GeV/c. Next-to-Leading Order perturbative QCD calculations, which are consistent with the π0 spectrum at s=0.9 TeV, overestimate those of π0 and η mesons at s=7 TeV, but agree with the measured η/π0 ratio at s=7 TeV.

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