Invariant yields of neutral pions at midrapidity in the transverse momentum range 0.6 < pT < 12 GeV/c mea- sured in Pb–Pb collisions at √sNN = 2.76 TeV are presented for six centrality classes. The pp reference spectrum was mea- sured in the range 0.4 < pT < 10 GeV/c at the same center- of-mass energy. The nuclear modification factor, RAA , shows a suppression of neutral pions in central Pb–Pb collisions by a factor of up to about 8−10 for 5 <= pT <= 7GeV/c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations.

Neutral pion production at midrapidity in pp and Pb–Pb collisions at $$\sqrt{s_{\mathrm {NN}}}= 2.76\,{\mathrm {TeV}}$$ s NN = 2.76 TeV

BALA, RENU;BEOLE', Stefania;BERZANO, DARIO CARLO DOMENICO;L. Bianchi;BOTTA, Elena;BRUNA, ELENA;BUFALINO, STEFANIA;CORRALES MORALES, YASSER;FERRETTI, Alessandro;GAGLIARDI, Martino;GALLIO, Mauro;INNOCENTI, GIAN MICHELE;LATTUCA, ALESSANDRA;LEONCINO, MARCO;MASERA, Massimo;MILANO, LEONARDO;OPPEDISANO, Chiara;RAMELLO, Luciano;RIVETTI, Angelo;RUSSO, RICCARDO;
2014-01-01

Abstract

Invariant yields of neutral pions at midrapidity in the transverse momentum range 0.6 < pT < 12 GeV/c mea- sured in Pb–Pb collisions at √sNN = 2.76 TeV are presented for six centrality classes. The pp reference spectrum was mea- sured in the range 0.4 < pT < 10 GeV/c at the same center- of-mass energy. The nuclear modification factor, RAA , shows a suppression of neutral pions in central Pb–Pb collisions by a factor of up to about 8−10 for 5 <= pT <= 7GeV/c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations.
2014
74
3108
3108
neutral pion production; PP COLLISIONS; Pb-Pb collisions
B. Abelev;J. Adam;D. Adamová;M. M. Aggarwal;M. Agnello;A. Agostinelli;N. Agrawal;Z. Ahammed;N. Ahmad;I. Ahmed;S. U. Ahn;S. A. Ahn;I. Aimo;S. Aiola;M. Ajaz;A. Akindinov;S. N. Alam;D. Aleksandrov;B. Alessandro;D. Alexandre;A. Alici;A. Alkin;J. Alme;T. Alt;S. Altinpinar;I. Altsybeev;C. Alves Garcia Prado;C. Andrei;A. Andronic;V. Anguelov;J. Anielski;T. Antičić;F. Antinori;P. Antonioli;L. Aphecetche;H. Appelshäuser;S. Arcelli;N. Armesto;R. Arnaldi;T. Aronsson;I. C. Arsene;M. Arslandok;A. Augustinus;R. Averbeck;T. C. Awes;M. D. Azmi;M. Bach;A. Badalà;Y. W. Baek;S. Bagnasco;R. Bailhache;R. Bala;A. Baldisseri;F. Baltasar Dos Santos Pedrosa;R. C. Baral;R. Barbera;F. Barile;G. G. Barnaföldi;L. S. Barnby;V. Barret;J. Bartke;M. Basile;N. Bastid;S. Basu;B. Bathen;G. Batigne;B. Batyunya;P. C. Batzing;C. Baumann;I. G. Bearden;H. Beck;C. Bedda;N. K. Behera;I. Belikov;F. Bellini;R. Bellwied;E. Belmont-Moreno;R. Belmont;V. Belyaev;G. Bencedi;S. Beole;I. Berceanu;A. Bercuci;Y. Berdnikov;D. Berenyi;M. E. Berger;R. A. Bertens;D. Berzano;L. Betev;A. Bhasin;I. R. Bhat;A. K. Bhati;B. Bhattacharjee;J. Bhom;L. Bianchi;N. Bianchi;C. Bianchin;J. Bielčík;J. Bielčíková;A. Bilandzic;S. Bjelogrlic;F. Blanco;D. Blau;C. Blume;F. Bock;A. Bogdanov;H. Bøggild;M. Bogolyubsky;F. V. Böhmer;L. Boldizsár;M. Bombara;J. Book;H. Borel;A. Borissov;F. Bossú;M. Botje;E. Botta;S. Böttger;P. Braun-Munzinger;M. Bregant;T. Breitner;T. A. Broker;T. A. Browning;M. Broz;E. Bruna;G. E. Bruno;D. Budnikov;H. Buesching;S. Bufalino;P. Buncic;O. Busch;Z. Buthelezi;D. Caffarri;X. Cai;H. Caines;L. Calero Diaz;A. Caliva;E. Calvo Villar;P. Camerini;F. Carena;W. Carena;J. Castillo Castellanos;E. A. R. Casula;V. Catanescu;C. Cavicchioli;C. Ceballos Sanchez;J. Cepila;P. Cerello;B. Chang;S. Chapeland;J. L. Charvet;S. Chattopadhyay;S. Chattopadhyay;V. Chelnokov;M. Cherney;C. Cheshkov;B. Cheynis;V. Chibante Barroso;D. D. Chinellato;P. Chochula;M. Chojnacki;S. Choudhury;P. Christakoglou;C. H. Christensen;P. Christiansen;T. Chujo;S. U. Chung;C. Cicalo;L. Cifarelli;F. Cindolo;J. Cleymans;F. Colamaria;D. Colella;A. Collu;M. Colocci;G. Conesa Balbastre;Z. Conesa del Valle;M. E. Connors;J. G. Contreras;T. M. Cormier;Y. Corrales Morales;P. Cortese;I. Cortés Maldonado;M. R. Cosentino;F. Costa;P. Crochet;R. Cruz Albino;E. Cuautle;L. Cunqueiro;A. Dainese;R. Dang;A. Danu;D. Das;I. Das;K. Das;S. Das;A. Dash;S. Dash;S. De;H. Delagrange;A. Deloff;E. Dénes;G. D’Erasmo;A. De Caro;G. de Cataldo;J. de Cuveland;A. De Falco;D. De Gruttola;N. De Marco;S. De Pasquale;R. de Rooij;M. A. Diaz Corchero;T. Dietel;P. Dillenseger;R. Divià;D. Di Bari;S. Di Liberto;A. Di Mauro;P. Di Nezza;Ø. Djuvsland;A. Dobrin;T. Dobrowolski;D. Domenicis Gimenez;B. Dönigus;O. Dordic;S. Dørheim;A. K. Dubey;A. Dubla;L. Ducroux;P. Dupieux;A. K. Dutta Majumdar;T. E. Hilden;R. J. Ehlers;D. Elia;H. Engel;B. Erazmus;H. A. Erdal;D. Eschweiler;B. Espagnon;M. Esposito;M. Estienne;S. Esumi;D. Evans;S. Evdokimov;D. Fabris;J. Faivre;D. Falchieri;A. Fantoni;M. Fasel;D. 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