Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at √sNN = 2.76 TeV
Articolo
Data di Pubblicazione:
2013
Abstract:
We present the first wide-range measurement of the charged-particle pseudorapidity density distribution, for different centralities (the 0–5%, 5–10%, 10–20%, and 20–30% most central events) in Pb–Pb collisions at √sNN = 2.76 TeV at the LHC. The measurement is performed using the full coverage of the ALICE detectors, −5.0 < η < 5.5, and employing a special analysis technique based on collisions arising from LHC ‘satellite’ bunches. We present the pseudorapidity density as a function of the number of participating nucleons as well as an extrapolation to the total number of produced charged particles (Nch = 17 165 ± 772 for the 0–5% most central collisions). From the measured dNch/dη distribution we derive the rapidity density distribution, dNch/dy, under simple assumptions. The rapidity density distribution is found to be significantly wider than the predictions of the Landau model. We assess the validity of longitudinal scaling by comparing to lower energy results from RHIC. Finally the mechanisms of the underlying particle production are discussed based on a comparison with various theoretical models.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
LHC; HEAVY-ION COLLISIONS; Charged-Particle Density; Wide rapidity coverage
Elenco autori:
E., Abbas a; B., Abelev bt; J., Adam al; D., Adamová ca; A. M., Adare dz; M. M., Aggarwal ce; G., Aglieri Rinella ah; M., Agnello cv; Ck, ; A. G., Agocs dy; A., Agostinelli ab; Z., Ahammed dt; A., Ahmad Masoodi r; N., Ahmad r; S. U., Ahn bm; S. A., Ahn bm; I., Aimo y; Cv, Ck; M., Ajaz p; A., Akindinov ay; D., Aleksandrov cq; B., Alessandro cv; A., Alici cx; M, ; A., Alkin d; E., Almaráz Aviña bi; J., Alme aj; T., Alt an; V., Altini af; S., Altinpinar s; I., Altsybeev dv; C., Andrei bw; A., Andronic cn; V., Anguelov cj; J., Anielski bg; C., Anson t; T., Anticˇic ́ co; F., Antinori cw; P., Antonioli cx; L., Aphecetche dd; H., Appelshäuser be; N., Arbor bp; S., Arcelli ab; A., Arend be; N., Armesto q; R., Arnaldi cv; T., Aronsson dz; I. C., Arsene cn; M., Arslandok be; A., Asryan dv; A., Augustinus ah; R., Averbeck cn; T. C., Awes cb; J., Äystö aq; M. D., Azmi r; Cg, ; M., Bach an; A., Badalà cu; Y. W., Baek bo; Ao, ; R., Bailhache be; R., Bala ch; Cv, ; A., Baldisseri o; F., Baltasar Dos Santos Pedrosa ah; J., Bán az; R. C., Baral ba; R., Barbera aa; F., Barile af; G. G., Barnaföldi dy; L. S., Barnby cs; V., Barret bo; J., Bartke dh; M., Basile ab; N., Bastid bo; S., Basu dt; B., Bathen bg; G., Batigne dd; B., Batyunya bk; P. C., Batzing v; C., Baumann be; I. G., Bearden by; H., Beck be; N. K., Behera as; I., Belikov bj; F., Bellini ab; R., Bellwied dn; E., Belmont Moreno bi; G., Bencedi dy; S., Beole y; I., Berceanu bw; A., Bercuci bw; Y., Berdnikov cc; D., Berenyi dy; A. A. E., Bergognon dd; R. A., Bertens ax; D., Berzano y; Cv, ; L., Betev ah; A., Bhasin ch; A. K., Bhati ce; J., Bhom dr; N., Bianchi bq; L., Bianchi y; C., Bianchin ax; J., Bielcˇík al; J., Bielcˇíková ca; A., Bilandzic by; S., Bjelogrlic ax; F., Blanco k; F., Blanco dn; D., Blau cq; C., Blume be; M., Boccioli ah; S., Böttger bd; A., Bogdanov bu; H., Bøggild by; M., Bogolyubsky av; L., Boldizsár dy; M., Bombara am; J., Book be; H., Borel o; A., Borissov dx; F., Bossú cg; M., Botje bz; E., Botta y; E., Braidot bs; P., Braun Munzinger cn; M., Bregant dd; T., Breitner bd; T. A., Broker be; T. A., Browning cl; M., Broz ak; R., Brun ah; E., Bruna y; Cv, ; G. E., Bruno af; D., Budnikov cp; H., Buesching be; S., Bufalino y; Cv, ; P., Buncic ah; O., Busch cj; Z., Buthelezi cg; D., Caffarri ac; Cw, ; X., Cai h; H., Caines dz; E., Calvo Villar ct; Camerini, Paolo; V., Canoa Roman l; G., Cara Romeo cx; F., Carena ah; W., Carena ah; N., Carlin Filho dk; F., Carminati ah; A., Casanova Díaz bq; J., Castillo Castellanos o; J. F., Castillo Hernandez cn; E. A. R., Casula x; V., Catanescu bw; C., Cavicchioli ah; C., Ceballos Sanchez j; J., Cepila al; P., Cerello cv; B., Chang aq; Eb, ; S., Chapeland ah; J. L., Charvet o; S., Chattopadhyay dt; S., Chattopadhyay cr; M., Cherney cd; C., Cheshkov ah; Dm, ; B., Cheynis dm; V., Chibante Barroso ah; D. D., Chinellato dn; P., Chochula ah; M., Chojnacki by; S., Choudhury dt; P., Christakoglou bz; C. H., Christensen by; P., Christiansen ag; T., Chujo dr; S. U., Chung cm; C., Cicalo cy; L., Cifarelli ab; M, ; F., Cindolo cx; J., Cleymans cg; F., Colamaria af; D., Colella af; A., Collu x; G., Conesa Balbastre bp; Z., Conesa del Valle ah; Au, ; M. E., Connors dz; G., Contin w; J. G., Contreras l; T. M., Cormier dx; Y., Corrales Morales y; P., Cortese ae; I., Cortés Maldonado c; M. R., Cosentino bs; F., Costa ah; M. E., Cotallo k; E., Crescio l; P., Crochet bo; E., Cruz Alaniz bi; R., Cruz Albino l; E., Cuautle bh; L., Cunqueiro bq; A., Dainese ac; Cw, ; H. H., Dalsgaard by; R., Dangh; A., Danubc; K., Dascr; I., Dasau; S., Dase; D., Dascr; A., Dashdl; S., Dashas; S., Dedt; G. O. V., de Barros dk; A., De Caro ad; M, ; G., de Cataldo da; J., de Cuveland an; A., De Falco x; D., De Gruttola ad; M, ; H., Delagrange dd; A., Deloff bv; N., De Marco cv; E., Dénes dy; S., De Pasquale ad; A., Deppman dk; G. D., Erasmo af; R., de Rooij ax; M. A., Diaz Corchero k; D., Di Bari af; T., Dietel bg; C., Di Gig
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