Underlying Event measurements in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV with the ALICE experiment at the LHC
Articolo
Data di Pubblicazione:
2012
Abstract:
Measurements of Underlying Event observables in pp collisions at √s = 0.9 and 7TeV. 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 dierent 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%.
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 dierent 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:
1.1 Articolo in rivista
Keywords:
Hadron-Hadron Scattering
Elenco autori:
Abelev, Betty; Abrahantes Quintana, Arian; Adamova, Dagmar; Marshall Adare, Andrew; Aggarwal, Madan; Aglieri Rinella, Gianluca; Gabor Agocs, Andras; Agostinelli, Andrea; Aguilar Salazar, Saul; Ahammed, Zubayer; Ahmad, Nazeer; Ahmad, Arshad; Un Ahn, Sang; Akindinov, Alexander; Aleksandrov, Dmitry; Alessandro, Bruno; Ruben Alfaro Molina, Jose; Alici, Andrea; Alkin, Anton; Jonathan Almaraz Avina, Erick; Alt, Torsten; Altini, Valerio; Altinpinar, Sedat; Altsybeev, Igor; Andrei, Cristian; Andronic, Anton; Anguelov, Venelin; Daniel Anson, Christopher; Anticic, Tome; Antinori, Federico; Antonioli, Pietro; Bernard Aphecetche, Laurent; Appelshauser, Harald; Arbor, Nicolas; Arcelli, Silvia; Arend, Andreas; Armesto, Nestor; Arnaldi, Roberta; Robert Aronsson, Tomas; Cristian Arsene, Ionut; Arslandok, Mesut; Asryan, Andzhey; Augustinus, Andre; Peter Averbeck, Ralf; Awes, Terry; Heikki Aysto, Juha; Danish Azmi, Mohd; Jakob Bach, Matthias; Badala, Angela; Wook Baek, Yong; Marie Bailhache, Raphaelle; Bala, Renu; Baldini Ferroli, Rinaldo; Baldisseri, Alberto; Baldit, Alain; Baltasar Dos Santos Pedrosa, Fernando; Ban, Jaroslav; Chandra Baral, Rama; Barbera, Roberto; Barile, Francesco; Gabor Barnafoldi, Gergely; Stuart Barnby, Lee; Barret, Valerie; Gustaw Bartke, Jerzy; Basile, Maurizio; Bastid, Nicole; Bathen, Bastian; Batigne, Guillaume; Batyunya, Boris; Heinrich Baumann, Christoph; Gardner Bearden, Ian; Beck, Hans; Belikov, Iouri; Bellini, Francesca; Bellwied, Rene; Belmont-Moreno, Ernesto; Beole, Stefania; Berceanu, Ionela; Bercuci, Alexandru; Berdnikov, Yaroslav; Berenyi, Daniel; Bergmann, Cyrano; Berzano, Dario; Betev, Latchezar; Bhasin, Anju; Kumar Bhati, Ashok; Bianchi, Nicola; Bianchi, Livio; Bianchin, Chiara; Bielcik, Jaroslav; Bielcikova, Jana; Bilandzic, Ante; Blanco, F.; Blanco, Francesco; Blau, Dmitry; Blume, Christoph; Boccioli, Marco; Bock, Nicolas; Bogdanov, Alexey; Boggild, Hans; Bogolyubsky, Mikhail; Boldizsar, Laszlo; Bombara, Marek; Book, Julian; Borel, Herve; Borissov, Alexander; Bortolin, Claudio; Nath Bose, Suvendu; Bossu, Francesco; Botje, Michiel; Bottger, Stefan; Alexandre Boyer, Bruno; Braun-Munzinger, Peter; Bregant, Marco; Gunther Breitner, Timo; Broz, Michal; Brun, Rene; Bruna, Elena; Eugenio Bruno, Giuseppe; Budnikov, Dmitry; Buesching, Henner; Bufalino, Stefania; Bugaiev, Kyrylo; Busch, Oliver; Zinhle Buthelezi, Edith; Caffarri, Davide; Cai, Xu; Louise Caines, Helen; Calvo Villar, Ernesto; Camerini, Paolo; Canoa Roman, Veronica; Cara Romeo, Giovanni; Carena, Francesco; Carena, Wisla; Carlin Filho, Nelson; Carminati, Federico; Andres Carrillo Montoya, Camilo; Ofelia Casanova Diaz, Amaya; Caselle, Michele; Ernesto Castillo Castellanos, Javier; Francisco Castillo Hernandez, Juan; Anna Rita Casula, Ester; Catanescu, Vasile; Cavicchioli, Costanza; Cepila, Jan; Cerello, Piergiorgio; Chang, Beomsu; Chapeland, Sylvain; Fernand Charvet, Jean-Luc; Chattopadhyay, Sukalyan; Chattopadhyay, Subhasis; Gerard Cherney, Michael; Cheshkov, Cvetan; Cheynis, Brigitte; Chiavassa, Emilio; Miguel Chibante Barroso, Vasco; Chinellato, David; Chochula, Peter; Chojnacki, Marek; Christakoglou, Panagiotis; Holm Christensen, Christian; Christiansen, Peter; Chujo, Tatsuya; Chung, Suh-Urk; Cicalo, Corrado; Cifarelli, Luisa; Cindolo, Federico; Willy Andre Cleymans, Jean; Coccetti, Fabrizio; Michel Coffin, Jean-Pierre; Colamaria, Fabio; Colella, Domenico; Conesa Balbastre, Gustavo; Conesa Valle, Zaida; Constantin, Paul; Contin, Giacomo; Guillermo Contreras, Jesus; Michael Cormier, Thomas; Corrales Morales, Yasser; Cortese, Pietro; Cortes Maldonado, Ismael; Rogerio Cosentino, Mauro; Costa, Filippo; Enrique Cotallo, Manuel; Crescio, Elisabetta; Crochet, Philippe; Cruz Alaniz, Emilia; Cuautle, Eleazar; Cunqueiro, Leticia; Dainese, Andrea; Hjersing Dalsgaard, Hans; Danu, Andrea; Das, Indranil; Das, Kushal; Das, Debasish; Kumar Dash, Ajay; Dash, Sadhana; De, Sudipan; Azevedo Moregula, Andrea; Barros, Gabriel; Caro, Annalisa; Cataldo, Giacinto; Cuveland
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