@article{3036746, title = "Strange particle production in proton–proton collisions at √s = 0.9 TeV with ALICE at the LHC", author = "Aamodt, K. and Abrahantes Quintana, A. and Adamová, D. and Adare, A.M. and Aggarwal, M.M. and Aglieri Rinella, G. and Agocs, A.G. and Aguilar Salazar, S. and Ahammed, Z. and Ahmad, N. and Ahmad Masoodi, A. and Ahn, S.U. and Akindinov, A. and Aleksandrov, D. and Alessandro, B. and Alfaro Molina, R. and Alici, A. and Alkin, A. and Almaráz Aviña, E. and Alt, T. and Altini, V. and Altinpinar, S. and Altsybeev, I. and Andrei, C. and Andronic, A. and Anguelov, V. and Anson, C. and Antičić, T. and Antinori, F. and Antonioli, P. and Aphecetche, L. and Appelshäuser, H. and Arbor, N. and Arcelli, S. and Arend, A. and Armesto, N. and Arnaldi, R. and Aronsson, T. and Arsene, I.C. and Asryan, A. and Augustinus, A. and Averbeck, R. and Awes, T.C. and Äystö, J. and Azmi, M.D. and Bach, M. and Badalà, A. and Baek, Y.W. and Bagnasco, S. and Bailhache, R. and Bala, R. and Baldini Ferroli, R. and Baldisseri, A. and Baldit, A. and Bán, J. and Barbera, R. and Barile, F. and Barnaföldi, G.G. and Barnby, L.S. and Barret, V. and Bartke, J. and Basile, M. and Bastid, N. and Bathen, B. and Batigne, G. and Batyunya, B. and Baumann, C. and Bearden, I.G. and Beck, H. and Belikov, I. and Bellini, F. and Bellwied, R. and Belmont-Moreno, E. and Beole, S. and Berceanu, I. and Bercuci, A. and Berdermann, E. and Berdnikov, Y. and Betev, L. and Bhasin, A. and Bhati, A.K. and Bianchi, L. and Bianchi, N. and Bianchin, C. and Bielčík, J. and Bielčíková, J. and Bilandzic, A. and Biolcati, E. and Blanc, A. and Blanco, F. and Blanco, F. and Blau, D. and Blume, C. and Boccioli, M. and Bock, N. and Bogdanov, A. and Bøggild, H. and Bogolyubsky, M. and Boldizsár, L. and Bombara, M. and Bombonati, C. and Book, J. and Borel, H. and Bortolin, C. and Bose, S. and Bossú, F. and Botje, M. and Böttger, S. and Boyer, B. and Braun-Munzinger, P. and Bravina, L. and Bregant, M. and Breitner, T. and Broz, M. and Brun, R. and Bruna, E. and Bruno, G.E. and Budnikov, D. and Buesching, H. and Busch, O. and Buthelezi, Z. and Caffarri, D. and Cai, X. and Caines, H. and Calvo Villar, E. and Camerini, P. and Canoa Roman, V. and Cara Romeo, G. and Carena, F. and Carena, W. and Carminati, F. and Casanova Díaz, A. and Caselle, M. and Castillo Castellanos, J. and Catanescu, V. and Cavicchioli, C. and Cerello, P. and Chang, B. and Chapeland, S. and Charvet, J.L. and Chattopadhyay, S. and Chattopadhyay, S. and Cherney, M. and Cheshkov, C. and Cheynis, B. and Chiavassa, E. and Chibante Barroso, V. and Chinellato, D.D. and Chochula, P. and Chojnacki, M. and Christakoglou, P. and Christensen, C.H. and Christiansen, P. and Chujo, T. and Cicalo, C. and Cifarelli, L. and Cindolo, F. and Cleymans, J. and Coccetti, F. and Coffin, J.-P. and Coli, S. and Conesa Balbastre, G. and Conesa del Valle, Z. and Constantin, P. and Contin, G. and Contreras, J.G. and Cormier, T.M. and Corrales Morales, Y. and Cortés Maldonado, I. and Cortese, P. and Cosentino, M.R. and Costa, F. and Cotallo, M.E. and Crescio, E. and Crochet, P. and Cuautle, E. and Cunqueiro, L. and Erasmo, G.D. and Dainese, A. and Dalsgaard, H.H. and Danu, A. and Das, D. and Das, I. and Dash, A. and Dash, S. and De, S. and De Azevedo Moregula, A. and de Barros, G.O.V. and De Caro, A. and de Cataldo, G. and de Cuveland, J. and De Falco, A. and De Gruttola, D. and De Marco, N. and De Pasquale, S. and De Remigis, R. and de Rooij, R. and Delagrange, H. and Delgado Mercado, Y. and Dellacasa, G. and Deloff, A. and Demanov, V. and Dénes, E. and Deppman, A. and Di Bari, D. and Di Giglio, C. and Di Liberto, S. and Di Mauro, A. and Di Nezza, P. and Dietel, T. and Divià, R. and Djuvsland, Ø. and Dobrin, A. and Dobrowolski, T. and Domínguez, I. and Dönigus, B. and Dordic, O. and Driga, O. and Dubey, A.K. and Dubuisson, J. and Ducroux, L. and Dupieux, P. and Dutta Majumdar, A.K. and Dutta Majumdar, M.R. and Elia, D. and Emschermann, 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and Tumkin, A. and Turrisi, R. and Turvey, A.J. and Tveter, T.S. and Ulery, J. and Ullaland, K. and Uras, A. and Urbán, J. and Urciuoli, G.M. and Usai, G.L. and Vacchi, A. and Vala, M. and Valencia Palomo, L. and Vallero, S. and van der Kolk, N. and van Leeuwen, M. and Vande Vyvre, P. and Vannucci, L. and Vargas, A. and Varma, R. and Vasileiou, M. and Vasiliev, A. and Vechernin, V. and Venaruzzo, M. and Vercellin, E. and Vergara, S. and Vernet, R. and Verweij, M. and Vickovic, L. and Viesti, G. and Vikhlyantsev, O. and Vilakazi, Z. and Villalobos Baillie, O. and Vinogradov, A. and Vinogradov, L. and Vinogradov, Y. and Virgili, T. and Viyogi, Y.P. and Vodopyanov, A. and Voloshin, K. and Voloshin, S. and Volpe, G. and vonHaller, B. and Vranic, D. and Vrláková, J. and Vulpescu, B. and Wagner, B. and Wagner, V. and Wan, R. and Wang, D. and Wang, Y. and Wang, Y. and Watanabe, K. and Wessels, J.P. and Westerhoff, U. and Wiechula, J. and Wikne, J. and Wilde, M. and Wilk, A. and Wilk, G. and Williams, M.C.S. and Windelband, B. and Yang, H. and Yasnopolskiy, S. and Yi, J. and Yin, Z. and Yokoyama, H. and Yoo, I.-K. and Yuan, X. and Yushmanov, I. and Zabrodin, E. and Zampolli, C. and Zaporozhets, S. and Zarochentsev, A. and Závada, P. and Zbroszczyk, H. and Zelnicek, P. and Zenin, A. and Zgura, I. and Zhalov, M. and Zhang, X. and Zhou, D. and Zichichi, A. and Zinovjev, G. and Zoccarato, Y. and Zynovyev, M. and The ALICE Collaboration", journal = "The European Physical Journal C - Particles and Fields", year = "2011", volume = "71", number = "3", pages = "1-24", publisher = "Springer New York LLC", issn = "1434-6044, 1434-6052", doi = "10.1140/epjc/s10052-011-1594-5", abstract = "The production of mesons containing strange quarks (K0 S, ϕ) and both singly and doubly strange baryons (⋀, ⊼, and Ξ− +Ξ+) 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 K0 S 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 ⋀, 0.047 ± 0.002(stat.) ± 0.005(syst.) for ⊼ and 0.0101 ± 0.0020(stat.) ± 0.0009(syst.) for Ξ− +Ξ+. 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. © CERN for the benefit of the ALICE collaboration 2011." }