Underlying Event measurements in pp collisions at root(s) = 0.9 and 7 TeV with the ALICE experiment at the LHC
Articolo
Data di Pubblicazione:
2012
Abstract:
We present measurements of Underlying Event observables in pp collisions at root(s) = 0.9 and 7 TeV. The analysis is performed as a function of the highest charged-particle transverse momentum pT,LT in the event. Different regions are defined with respect to the azimuthal direction of the leading (highest transverse momentum) track: Toward, Transverse and Away. The Toward and Away regions collect the fragmentation products of the hardest partonic interaction. The Transverse region is expected to be most sensitive to the Underlying Event activity. The study is performed with charged particles above three
different pT thresholds: 0.15, 0.5 and 1.0 GeV/c. In the Transverse region we observe an increase in the multiplicity of a factor 2–3 between the lower and higher collision energies, depending on the track pT threshold considered. Data are compared to Pythia 6.4, Pythia 8.1 and Phojet. On average, all models considered underestimate the multiplicity and summed pT in the Transverse region by about 10–30%.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Betty Abelev;Arian Abrahantes Quintana;Dagmar Adamova;Andrew Marshall Adare;Madan Aggarwal;Gianluca Aglieri Rinella;Andras Gabor Agocs;Andrea Agostinelli;Saul Aguilar Salazar;Zubayer Ahammed;Nazeer Ahmad;Arshad Ahmad;Sang Un Ahn;Alexander Akindinov;Dmitry Aleksandrov;Bruno Alessandro;Jose Ruben Alfaro Molina;Andrea Alici;Anton Alkin;Erick Jonathan Almaraz Avina;Torsten Alt;Valerio Altini;Sedat Altinpinar;Igor Altsybeev;Cristian Andrei;Anton Andronic;Venelin Anguelov;Christopher Daniel Anson;Tome Anticic;Federico Antinori;Pietro Antonioli;Laurent Bernard Aphecetche;Harald Appelshauser;Nicolas Arbor;Silvia Arcelli;Andreas Arend;Nestor Armesto;Roberta Arnaldi;Tomas Robert Aronsson;Ionut Cristian Arsene;Mesut Arslandok;Andzhey Asryan;Andre Augustinus;Ralf Peter Averbeck;Terry Awes;Juha Heikki Aysto;Mohd Danish Azmi;Matthias Jakob Bach;Angela Badala;Yong Wook Baek;Raphaelle Marie Bailhache;Renu Bala;Rinaldo Baldini Ferroli;Alberto Baldisseri;Alain Baldit;Fernando Baltasar Dos Santos Pedrosa;Jaroslav Ban;Rama Chandra Baral;Roberto Barbera;Francesco Barile;Gergely Gabor Barnafoldi;Lee Stuart Barnby;Valerie Barret;Jerzy Gustaw Bartke;Maurizio Basile;Nicole Bastid;Bastian Bathen;Guillaume Batigne;Boris Batyunya;Christoph Heinrich Baumann;Ian Gardner Bearden;Hans Beck;Iouri Belikov;Francesca Bellini;Rene Bellwied;Ernesto Belmont-Moreno;Stefania Beole;Ionela Berceanu;Alexandru Bercuci;Yaroslav Berdnikov;Daniel Berenyi;Cyrano Bergmann;Dario Berzano;Latchezar Betev;Anju Bhasin;Ashok Kumar Bhati;Nicola Bianchi;Livio Bianchi;Chiara Bianchin;Jaroslav Bielcik;Jana Bielcikova;Ante Bilandzic;F. Blanco;Francesco Blanco;Dmitry Blau;Christoph Blume;Marco Boccioli;Nicolas Bock;Alexey Bogdanov;Hans Boggild;Mikhail Bogolyubsky;Laszlo Boldizsar;Marek Bombara;Julian Book;Herve Borel;Alexander Borissov;Claudio Bortolin;Suvendu Nath Bose;Francesco Bossu;Michiel Botje;Stefan Bottger;Bruno Alexandre Boyer;Peter Braun-Munzinger;Marco Bregant;Timo Gunther Breitner;Michal Broz;Rene Brun;Elena Bruna;Giuseppe Eugenio Bruno;Dmitry Budnikov;Henner Buesching;Stefania Bufalino;Kyrylo Bugaiev;Oliver Busch;Edith Zinhle Buthelezi;Davide Caffarri;Xu Cai;Helen Louise Caines;Ernesto Calvo Villar;Paolo Camerini;Veronica Canoa Roman;Giovanni Cara Romeo;Francesco Carena;Wisla Carena;Nelson Carlin Filho;Federico Carminati;Camilo Andres Carrillo Montoya;Amaya Ofelia Casanova Diaz;Michele Caselle;Javier Ernesto Castillo Castellanos;Juan Francisco Castillo Hernandez;Ester Anna Rita Casula;Vasile Catanescu;Costanza Cavicchioli;Jan Cepila;Piergiorgio Cerello;Beomsu Chang;Sylvain Chapeland;Jean-Luc Fernand Charvet;Sukalyan Chattopadhyay;Subhasis Chattopadhyay;Michael Gerard Cherney;Cvetan Cheshkov;Brigitte Cheynis;Emilio Chiavassa;Vasco Miguel Chibante Barroso;David Chinellato;Peter Chochula;Marek Chojnacki;Panagiotis Christakoglou;Christian Holm Christensen;Peter Christiansen;Tatsuya Chujo;Suh-Urk Chung;Corrado Cicalo;Luisa Cifarelli;Federico Cindolo;Jean Willy Andre Cleymans;Fabrizio Coccetti;Jean-Pierre Michel Coffin;Fabio Colamaria;Domenico Colella;Gustavo Conesa Balbastre;Zaida Conesa Valle;Paul Constantin;Giacomo Contin;Jesus Guillermo Contreras;Thomas Michael Cormier;Yasser Corrales Morales;Pietro Cortese;Ismael Cortes Maldonado;Mauro Rogerio Cosentino;Filippo Costa;Manuel Enrique Cotallo;Elisabetta Crescio;Philippe Crochet;Emilia Cruz Alaniz;Eleazar Cuautle;Leticia Cunqueiro;Andrea Dainese;Hans Hjersing Dalsgaard;Andrea Danu;Indranil Das;Kushal Das;Debasish Das;Ajay Kumar Dash;Sadhana Dash;Sudipan De;Andrea Azevedo Moregula;Gabriel Barros;Annalisa Caro;Giacinto Cataldo;Jan Cuveland;Alessandro Falco;Daniele Gruttola;Hugues Delagrange;Eduardo Castillo Sanchez;Andrzej Deloff;Vyacheslav Demanov;Nora Marco;Ervin Denes;Salv
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