Abstract

The effect of event background fluctuations on charged particle jet reconstruc- tion in Pb-Pb collisions at √sNN = 2.76 TeV has been measured with the ALICE experi- ment. The main sources of non-statistical fluctuations are characterized based purely on experimental data with an unbiased method, as well as by using single high pt particles and simulated jets embedded into real Pb-Pb events and reconstructed with the anti-kt jet finder. The influence of a low transverse momentum cut-off on particles used in the jet reconstruction is quantified by varying the minimum track pt between 0.15 GeV/c and 2 GeV/c. For embedded jets reconstructed from charged particles with pt > 0.15 GeV/c, the uncertainty in the reconstructed jet transverse momentum due to the heavy-ion back- ground is measured to be 11.3GeV/c (standard deviation) for the 10% most central Pb- Pb collisions, slightly larger than the value of 11.0GeV/c measured using the unbiased method. For a higher particle transverse momentum threshold of 2 GeV/c, which will gen- erate a stronger bias towards hard fragmentation in the jet finding process, the standard deviation of the fluctuations in the reconstructed jet transverse momentum is reduced to 4.8-5.0GeV/c for the 10% most central events. A non-Gaussian tail of the momentum uncertainty is observed and its impact on the reconstructed jet spectrum is evaluated for varying particle momentum thresholds, by folding the measured fluctuations with steeply falling spectra.

Autore Pugliese

• Mastroserio Annalisa

Tutti gli autori

• Abelev B , Adam J , Adamova D , Adare Am , Aggarwal Mm , Rinella Ga , Agocs Ag , Agostinelli A , Salazar Sa , Ahammed Z , Ahmad N , Masood Aa , Ahn Su , Akindinov A , Aleksandrov D , Alessandro B , Molina Ra , Alici A , Alkin A , Avina Ea , Alt T , Altini V , Altinpinar S , Altsybeev I , Andrei C , Andronic A , Anguelov V , Anielski J , Anson C , Anticic T , Antinori F , Antonioli P , Aphecetche L , Appelshauser H , Arbor N , Arcelli S , Arend A , Armesto N , Arnaldi R , Aronsson T , Arsene Ic , Arslandok M , Asryan A , Augustinus A , Averbeck R , Awes Tc , Aysto J , Azmi Md , Bach M , Badala A , Baek Yw , Bailhache R , Bala R , Ferrolilli Rb , Baldisseri A , Baldit A , Pedrosa Fbd , Ban J , Baral Rc , Barbera R , Barile F , Barnafoldi Gg , Barnby Ls , Barret V , Bartke J , Basile M , Bastid N , Bathen B , Batigne G , Batyunya B , Baumann C , Bearden Ig , Beck H , Belikov I , Bellini F , Bellwied R , Belmont Moreno E , Beole S , Berceanu I , Bercuci A , Berdnikov Y , Berenyi D , Bergmann C , Berzano D , Betev L , Bhasin A , Bhati Ak , Bianchi N , Bianchi L , Bianchin C , Bielcik J , Bielcikova J , Bilandzic A , Blanco F , Blanco F , Blau D , Blume C , Boccioli M , Bock N , Bogdanovn A , Boggild H , Bogolyubsky M , Boldizsar L , Bombara M , Book J , Borel H , Borissov A , Bose S , Bossu F , Botje M , Bottger S , Boyer B , Braun Munzinger P , Bregant M , Breitner T , Broz M , Brun R , Bruna E , Bruno Ge , Budnikov D , Buesching H , Bufalino S , Bugaiev K , Busch O , Buthelezi Z , Orduna Dc , Caffarri D , Cai X , Caines H , Villar Ec , Camerini P , Roman Vc , Romeo Gc , Carena F , Carena W , Carlin N , Carminati F , Montoya Cac , Diaz Ac , Caselle M , Castellanos Jc , Hernandez Jfc , Casula Ear , Catanescu V , Cavicchioli C , Cepila J , Cerello P , Chang B , Chapeland S , Charvet Jl , Chattopadhyay S , Chattopadhyay S , Cherney M , Cheshkov C , Cheynis B , Chiavassa E , Barroso Vc , Chinellato Dd , Chochula P , Chojnacki M , Christakoglou P , Christensen Ch , Christiansen P , Chujo T , Chung Su , Cicalo C , Cifarelli L , Cindolo F , Cleymans J , Coccetti F , Coffin Jp , Colamaria F , Colella D , Balbastre Gc , del Valle ZC , Constantin P , Contin G , Contreras Jg , Cormier Tm , Morales Yc , Cortese P , Maldonado Ic , Cosentino Mr , Costa F , Cotallo Me , Crescio E , Crochet P , Alaniz Ec , Cuautle E , Cunqueiro L , Dainese A , Dalsgaard Hh , Danu A , Das K , Das D , Das I , Dash A , Dash S , De S , Moregula Ad , de Barros GOV , De Caro A , de Cataldo G , de Cuveland J , De Falco A , De Gruttola D , Delagrangel H , Sanchez Ed , Deloff A , Demanov V , De Marco N , Denes E , De Pasquale S , Deppman A , Erasmo Gd , de Rooij R , Di Bari D , Dietel T , Di Giglio C , Di Liberto S , Di Mauro A , Di Nezza P , Divia R , Djuvsland O , Dobrin A , Dobrowolski T , Dominguez I , Donigus B , Dordic O , Driga O , Dubey Ak , Ducroux L , Dupieux P , Majumdar Akd , Majumdar Mrd , Elia D , Emschermann D , Engel H , Erdal Ha , Espagnon B , Estienne M , Esumi S , Evans D , Eyyubova G , Fabris D , Faivre J , Falchieri D , Fantoni A , Fasel M , Fearick R , Fedunov A , Fehlker D , Feldkamp L , Felea D , Feofilov G , Tellez Af , Ferretti A , Ferretti R , Figiel J , Figueredo Mas , Filchagin S , Fini R , Finogeev D , Fionda Fm , Fiore Em , Floris M , Foertsch S , Foka P , Fokin S , Fragiacomo E , Fragkiadakissu M , Frankenfeld U , Fuchs U , Furget C , Girard Mf , Gaardhoje Jj , Gagliardi M , Gago A , Gallio M , Gangadharan Dr , Ganoti P , Garabatos C , Garcia Solis E , Garishvilia I , Gerhard J , Germain M , Geuna C , Gheata A , Gheata M , Ghidini B , Ghosh P , Gianotti P , Girard Mr , Giubellino P , Gladysz Dziadus E , Glassel P , Gomez R , Ferreiro Eg , Gonzalez Trueba LH , Gonzalez Zamora P , Gorbunov S , Goswami A , Gotovac S , Grabski V , Graczykowski Lk , Grajcarek R , Grelli A , Grigoras C , Grigoras A , Grigoriev V , Grigoryan S , Grigoryan A , Grinyov B , Grion N , Gros P , Grosse Oetringhaus JF , Grossiord Jy , Grosso R , Guber F , Guernane R

Titolo volume/Rivista

JOURNAL OF HIGH ENERGY PHYSICS

Anno di pubblicazione

2012

ISSN

1126-6708

ISBN

Non Disponibile

Numero di citazioni Wos

15

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

38

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile