Data di Pubblicazione:
2014
Abstract:
A measurement of the transverse momentum spectra of jets in Pb–Pb col- lisions at √sNN = 2.76TeV is reported. Jets are reconstructed from charged particles using the anti-kT jet algorithm with jet resolution parameters R of 0.2 and 0.3 in pseudo- rapidity |η| < 0.5. The transverse momentum pT of charged particles is measured down to 0.15 GeV/c which gives access to the low pT fragments of the jet. Jets found in heavy-ion collisions are corrected event-by-event for average background density and on an inclusive basis (via unfolding) for residual background fluctuations and detector effects. A strong suppression of jet production in central events with respect to peripheral events is observed. The suppression is found to be similar to the suppression of charged hadrons, which sug- gests that substantial energy is radiated at angles larger than the jet resolution parameter R = 0.3 considered in the analysis. The fragmentation bias introduced by selecting jets with a high pT leading particle, which rejects jets with a soft fragmentation pattern, has a similar effect on the jet yield for central and peripheral events. The ratio of jet spectra with R = 0.2 and R = 0.3 is found to be similar in Pb–Pb and simulated PYTHIA pp events, indicating no strong broadening of the radial jet structure in the reconstructed jets with R < 0.3.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
jets; heavy ion physics
Elenco autori:
B. Abelev;J. Adam;D. Adamová;M. M. Aggarwal;G. Aglieri Rinella;M. Agnello;A. G. Agocs;A. Agostinelli;N. Agrawal;Z. Ahammed;N. Ahmad;A. Ahmad Masoodi;I. Ahmed;S. U. Ahn;S. A. Ahn;I. Aimo;S. Aiola;M. Ajaz;A. Akindinov;D. Aleksandrov;B. Alessandro;D. Alexandre;A. Alici;A. Alkin;J. Alme;T. Alt;V. Altini;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;N. Arbor;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;V. Bairathi;R. Bala;A. Baldisseri;F. Baltasar Dos Santos Pedrosa;J. Bán;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;G. Bencedi;S. Beole;I. Berceanu;A. Bercuci;Y. Berdnikov;D. Berenyi;M. E. Berger;A. A. E. Bergognon;R. A. Bertens;D. Berzano;L. Betev;A. Bhasin;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;F. V. Boehmer;A. Bogdanov;H. Bøggild;M. Bogolyubsky;L. Boldizsár;M. Bombara;J. Book;H. Borel;A. Borissov;J. Bornschein;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;A. Caliva;E. Calvo Villar;P. Camerini;V. Canoa Roman;F. Carena;W. Carena;F. Carminati;A. Casanova Díaz;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;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 Valle;M. E. Connors;G. Contin;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;G. O. V. Barros;A. Caro;G. Cataldo;J. Cuveland;A. Falco;D. Gruttola;N. Marco;S. Pasquale;R. Rooij;M. A. Diaz Corchero;T. Dietel;R. Divià;D. Bari;S. Liberto;A. Mauro;P. Nezza;Ø. Djuvsland;A. Dobrin;T. Dobrowolski;D. Domenicis Gimenez;B. Dönigus;O. Dordic;S. Dorheim;A. K. Dubey;A. Dubla;L. Ducroux;P. Dupieux;A. K. Dutta Majumdar;D. Elia;H. Engel;B. Erazmus;H. A. Erdal;D. Eschweiler;B. Espagnon;M. Estienne;S. Esumi;D. Evans;S. Evdokimov;G. Eyyubova;D. Fabris;J. Faivre;D. Falchieri;A. Fantoni;M. Fasel;D. Fehlker;L. Feldkamp;D. Felea;A. Feliciello;G. Feofilov;J. Ferencei;A. Fernández Téllez;E. G. Ferreiro;A. Ferretti;A. Festanti;J. Figiel;M. A. S. Figueredo;S. Filchagin;D. Finogeev;F. M. Fionda;E. M. Fiore;E. Floratos;M. Floris;S. Foertsch;P. Foka;S. Fokin;E. Fragiacomo;A. Francescon;U. Frankenfeld;U. Fuchs;C. Furget;M. Fusco Girard;J. J. Gaardhøje;M. Gagliardi;M. Gallio;D. R. Gangadharan;P. Ganoti;C. Garabatos;E. Garcia-Solis;C. Gargiulo;I. Garishvili;J. Gerhard;M. Germain;A. Gheata;M. Gheata;B. Ghidini;P. Ghosh;S. K. Ghosh;P. Gianotti;P. Giubellino;E. Gladysz-Dziadus;P. Glässel;R. Gomez;P. González-Zamora;
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