Strange particle production in proton–proton collisions at √s= 0.9 TeV with ALICE at the LHC
Articolo
Data di Pubblicazione:
2011
Abstract:
The production of mesons containing strange quarks (K0s, φ) and both singly and doubly strange baryons (Lambda, Lambda_bar, and Xi- + Xi+_bar) are measured at mid-rapidity in pp collisions at √s= 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at mid-rapidity for inelastic pp collisions are presented. For mesons, we report yields (〈dN/dy〉) of 0.184 ± 0.002(stat.) ± 0.006(syst.) for K0s and 0.021 ± 0.004(stat.) ± 0.003(syst.) for φ. For baryons, we find 〈dN/dy〉=0.048 ± 0.001(stat.) ± 0.004(syst.) for Lambda, 0.047 ± 0.002(stat.) ± 0.005(syst.) for Lambda_bar and 0.0101 ± 0.0020(stat.) ± 0.0009(syst.) for Xi- + Xi+_bar. The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
ALICE; LHC; strange particle
Elenco autori:
K., Aamodt1; A., Abrahantes Quintana2; D., Adamová3; A. M., Adare4; M. M., Aggarwal5; G., Aglieri Rinella6; A. G., Agocs7; S., Aguilar Salazar8; Z., Ahammed9; N., Ahmad10; A., Ahmad Masoodi10; S. U., Ahn11; A., Akindinov12; D., Aleksandrov13; B., Alessandro14; R., Alfaro Molina8; A., Alici15; 16, ; A., Alkin17; E., Almaráz Aviña8; T., Alt18; V., Altini19; 20, ; S., Altinpinar21; I., Altsybeev22; C., Andrei23; A., Andronic21; V., Anguelov24; C., Anson25; T., Antičić26; F., Antinori27; 28, ; P., Antonioli16; L., Aphecetche29; H., Appelshäuser30; N., Arbor31; 32, ; S., Arcelli15; 16, ; A., Arend30; N., Armesto33; R., Arnaldi14; T., Aronsson4; I. C., Arsene21; A., Asryan22; A., Augustinus6; R., Averbeck21; T. C., Awes34; J., Äystö35; 36, ; M. D., Azmi10; M., Bach18; A., Badalà37; Y. W., Baek11; S., Bagnasco14; R., Bailhache30; R., Bala14; 38, ; R., Baldini Ferroli39; A., Baldisseri40; A., Baldit41; 42, ; J., Bán43; R., Barbera37; 44, ; F., Barile19; 20, ; G. G., Barnaföldi7; L. S., Barnby45; V., Barret41; 42, ; J., Bartke46; M., Basile15; 16, ; N., Bastid41; 42, ; B., Bathen47; G., Batigne29; B., Batyunya48; C., Baumann30; I. G., Bearden49; H., Beck30; I., Belikov50; F., Bellini15; 16, ; R., Bellwied51; E., Belmont Moreno8; S., Beole14; 38, ; I., Berceanu23; A., Bercuci23; E., Berdermann21; Y., Berdnikov52; L., Betev6; A., Bhasin53; A. K., Bhati5; L., Bianchi14; 38, ; N., Bianchi54; C., Bianchin27; 28, ; J., Bielčík55; J., Bielčíková3; A., Bilandzic56; E., Biolcati14; 38, ; A., Blanc41; 42, ; F., Blanco57; F., Blanco58; D., Blau13; C., Blume30; M., Boccioli6; N., Bock25; A., Bogdanov59; H., Bøggild49; M., Bogolyubsky60; L., Boldizsár7; M., Bombara61; C., Bombonati27; 28, ; J., Book30; H., Borel40; C., Bortolin27; S., Bose62; F., Bossú14; 38, ; M., Botje56; S., Böttger24; B., Boyer63; P., Braun Munzinger21; L., Bravina64; M., Bregant65; 66, ; T., Breitner24; M., Broz67; R., Brun6; E., Bruna4; G. E., Bruno19; 20, ; D., Budnikov68; H., Buesching30; O., Busch69; Z., Buthelezi70; D., Caffarri27; 28, ; X., Cai71; H., Caines4; E., Calvo Villar72; Camerini, Paolo; 66, ; V., Canoa Roman6; G., Cara Romeo16; F., Carena6; W., Carena6; F., Carminati6; A., Casanova Díaz54; M., Caselle6; J., Castillo Castellanos40; V., Catanescu23; C., Cavicchioli6; P., Cerello14; B., Chang35; 36, ; S., Chapeland6; J. L., Charvet40; S., Chattopadhyay62; S., Chattopadhyay9; M., Cherney73; C., Cheshkov74; 75, ; B., Cheynis74; 75, ; E., Chiavassa14; V., Chibante Barroso6; D. D., Chinellato76; P., Chochula6; M., Chojnacki77; 78, ; P., Christakoglou77; 78, ; C. H., Christensen49; P., Christiansen79; T., Chujo80; C., Cicalo81; L., Cifarelli15; 16, ; F., Cindolo16; J., Cleymans70; F., Coccetti39; J. P., Coffin50; S., Coli14; G., Conesa Balbastre54; Z., Conesa del Valle29; P., Constantin69; Contin, Giacomo; 66, ; J. G., Contreras82; T. M., Cormier51; Y., Corrales Morales14; 38, ; I., Cortés Maldonado83; P., Cortese84; 85, ; M. R., Cosentino76; F., Costa6; M. E., Cotallo57; E., Crescio82; P., Crochet41; 42, ; E., Cuautle86; L., Cunqueiro54; G. D., Erasmo19; 20, ; A., Dainese87; H. H., Dalsgaard49; A., Danu88; D., Das62; I., Das62; A., Dash89; S., Dash14; S., De9; A., Azevedo Moregula54; G. O. V., Barros90; A., Caro91; 92, ; G., Cataldo20; J., Cuveland18; A., Falco81; 93, ; D., Gruttola91; 92, ; N., Marco14; S., Pasquale91; 92, ; R., Remigis14; R., Rooij77; 78, ; H., Delagrange29; Y., Delgado Mercado72; G., Dellacasa84; 85, ; A., Deloff94; V., Demanov68; E., Dénes7; A., Deppman90; D., Di Bari19; 20, ; C., Di Giglio19; 20, ; S., Di Liberto95; A., Di Mauro6; P., Di Nezza54; T., Dietel47; R., Divià6; Ø., Djuvsland1; A., Dobrin51; T., Dobrowolski94; I., Domínguez86; B., Dönigus21; O., Dordic64; O., Driga29; A. K., Dubey9; J., Dubuisson6; L., Ducroux74; 75, ; P., Dupieux41; 42, ; A. K., Dutta Majumdar62; M. R., Dutta Majumdar9; D., Elia20; D., Emschermann47; H., Engel24; H. A., Erdal96; B., Espagnon63; M., Estienne29; S., Esumi
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