We present the measurements of particle pair yields per trigger particle ob- tained from di-hadron azimuthal correlations in pp collisions at √s = 0.9, 2.76, and 7 TeV recorded with the ALICE detector. The yields are studied as a function of the charged particle multiplicity. Taken together with the single particle yields the pair yields pro- vide information about parton fragmentation at low transverse momenta, as well as on the contribution of multiple parton interactions to particle production. Data are compared to calculations using the PYTHIA6, PYTHIA8, and PHOJET event generators.

Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC

ARNALDI, Roberta;BALA, RENU;BEOLE', Stefania;BERZANO, DARIO CARLO DOMENICO;BIANCHI, LIVIO;BOTTA, Elena;BRUNA, ELENA;BUFALINO, STEFANIA;FERRETTI, Alessandro;GAGLIARDI, Martino;GALLIO, Mauro;INNOCENTI, GIAN MICHELE;LEONCINO, MARCO;MASERA, Massimo;MILANO, LEONARDO;OPPEDISANO, Chiara;RAMELLO, Luciano;RUSSO, RICCARDO;SITTA, Mario;VALLERO, Sara;VERCELLIN, Ermanno;
2013-01-01

Abstract

We present the measurements of particle pair yields per trigger particle ob- tained from di-hadron azimuthal correlations in pp collisions at √s = 0.9, 2.76, and 7 TeV recorded with the ALICE detector. The yields are studied as a function of the charged particle multiplicity. Taken together with the single particle yields the pair yields pro- vide information about parton fragmentation at low transverse momenta, as well as on the contribution of multiple parton interactions to particle production. Data are compared to calculations using the PYTHIA6, PYTHIA8, and PHOJET event generators.
2013
2013
049
049
http://arxiv.org/abs/1307.1249v1
azimuthal correlations; p p collisions
B. Abelev;J. Adam;D. Adamová;A.M. Adare;M.M. Aggarwal;G. Aglieri Rinella;M. Agnello;A.G. Agocs;A. Agostinelli;Z. Ahammed;A. Ahmad Masoodi;N. Ahmad;I. Ahmed;S.U. Ahn;S.A. Ahn;I. Aimo;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. Andrei;A. Andronic;V. Anguelov;J. Anielski;C. Anson;T. Antičić;F. Antinori;P. Antonioli;L. Aphecetche;H. Appelshäuser;N. Arbor;S. Arcelli;A. Arend;N. Armesto;R. Arnaldi;T. Aronsson;I.C. Arsene;M. Arslandok;A. Asryan;A. Augustinus;R. Averbeck;T.C. Awes;J. Äystö;M.D. Azmi;M. Bach;A. Badalà;Y.W. Baek;R. Bailhache;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;N.K. Behera;I. Belikov;F. Bellini;R. Bellwied;E. Belmont-Moreno;G. Bencedi;S. Beole;I. Berceanu;A. Bercuci;Y. Berdanikov;D. Berenyi;A.A.E. Bergognon;R.A. Bertens;D. Berzano;L. Betev;A. Bhasin;A.K. Bhati;J. Bhom;L. Bianchi;N. Bianchi;C. Bianchin;J. Bielčík;J. Bielčíková;A. Bilandzic;S. Bjelogrlic;F. Blanco;F. Blanco;D. Blau;C. Blume;M. Boccioli;F. Bock;S. Böttger;A. Bogdanov;H. Bøggild;M. Bogolyubsky;L. Boldizsár;M. Bombara;J. Book;H. Borel;A. Borissov;J. Bornschein;F. Bossú;M. Botje;E. Botta;E. Braidot;P. Braun-Munzinger;M. Bregant;T. Breitner;T.A. Broker;T.A. Browning;M. Broz;R. Brun;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;G. Cara Romeo;F. Carena;W. Carena;N. Carlin Filho;F. Carminati;A. Casanova Díaz;J. Castillo Castellanos;J.F. Castillo Hernandez;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;G. Conesa Balbastre;Z. Conesa del 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;M.E. Cotallo;E. Crescio;P. Crochet;E. Cruz Alaniz;R. Cruz Albino;E. Cuautle;L. Cunqueiro;T.R. Czopowicz;A. Dainese;R. Dang;A. Danu;I. Das;S. Das;D. Das;K. Das;S. Dash;A. Dash;S. De;G.O.V. Barros;A. Caro;G. Cataldo;J. Cuveland;A. Falco;D. Gruttola;H. Delagrange;A. Deloff;N. Marco;E. Dénes;S. Pasquale;A. Deppman;G. D Erasmo;R. Rooij;M.A. Diaz Corchero;D. Bari;T. Dietel;C. Giglio;S. Liberto;A. Mauro;P. Nezza;R. Divià;Ø. Djuvsland;A. Dobrin;T. Dobrowolski;B. Dönigus;O. Dordic;A.K. Dubey;A. Dubla;L. Ducroux;P. Dupieux;A.K. Dutta Majumdar;D. Elia;B.G. Elwood;D. Emschermann;H. Engel;B. Erazmus;H.A. Erdal;D. Eschweiler;B. Espagnon;M. Estienne;S. 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