Production of pions, kaons and protons in pp collisions at 
with ALICE at the LHC
K. Aamodt,N. Abel,U. Abeysekara,A. Abrahantes Quintana,A. Abramyan,D. Adamová,M. M. Aggarwal,G. Aglieri Rinella,A. G. Agocs,S. Aguilar Salazar, Z. Ahammed, A. Ahmad,N. Ahmad,S. U. Ahn,R. Akimoto,A. Akindinov,D. Aleksandrov, B. Alessandro,R. Alfaro Molina,A. Alici,E. Almaráz Aviña, J. Alme,T. Alt,V. Altini,S. Altinpinar,C. Andrei, A. Andronic,G. Anelli,V. Angelov,C. Anson,T. Antičić,F. Antinori,S. Antinori,K. Antipin, D. Antończyk, P. Antonioli,A. Anzo, L. Aphecetche,H. Appelshäuser, S. Arcelli,R. Arceo,A. Arend,N. Armesto,R. Arnaldi, T. Aronsson,I. C. Arsene,A. Asryan, A. Augustinus, R. Averbeck, T. C. Awes, J. Äystö,M. D. Azmi,S. Bablok,M. Bach,A. Badalà,Y. W. Baek,S. Bagnasco,R. Bailhache,R. Bala, A. Baldisseri,A. Baldit,J. Bán,R. Barbera,G. G. Barnaföldi, L. S. Barnby,V. Barret,J. Bartke,F. Barile, M. Basile,V. Basmanov,N. Bastid,B. Bathen,G. Batigne,B. Batyunya,C. Baumann,I. G. Bearden,B. Becker,I. Belikov,R. Bellwied,E. Belmont-Moreno,A. Belogianni,L. Benhabib,S. Beole,I. Berceanu,A. Bercuci,E. Berdermann,Y. Berdnikov, L. Betev,A. Bhasin, A. K. Bhati,L. Bianchi,N. Bianchi,C. Bianchin,J. Bielčík,J. Bielčíková,A. Bilandzic,L. Bimbot,E. Biolcati,A. Blanc,F. Blanco,D. Blau,C. Blume,M. Boccioli,N. Bock,A. Bogdanov,H. Bøggild,M. Bogolyubsky,J. Bohm,L. Boldizsár,M. Bombara,C. Bombonati,M. Bondila,H. Borel,A. Borisov,C. Bortolin, S. Bose,L. Bosisio,F. Bossú, M. Botje,S. Böttger,G. Bourdaud,B. Boyer,M. Braun,P. Braun-Munzinger,L. Bravina,M. Bregant,T. Breitner,G. Bruckner,R. Brun,E. Bruna,G. E. Bruno,D. Budnikov,H. Buesching,P. Buncic, O. Busch,Z. Buthelezi,D. Caffarri,X. Cai,H. Caines,E. Calvo,E. Camacho,P. Camerini,M. Campbell,V. Canoa Roman,G. P. Capitani,G. Cara Romeo,F. Carena,W. Carena,F. Carminati,A. Casanova Díaz,M. Caselle,J. Castillo Castellanos,J. F. Castillo Hernandez,V. Catanescu,E. Cattaruzza,C. Cavicchioli,P. Cerello,V. Chambert,B. Chang,S. Chapeland,A. Charpy,J. L. Charvet,S. Chattopadhyay, M. Cherney,C. Cheshkov,B. Cheynis, E. Chiavassa,V. Chibante Barroso,D. D. Chinellato, P. Chochula,K. Choi,M. Chojnacki,P. Christakoglou,C. H. Christensen,P. Christiansen,T. Chujo,F. Chuman,C. Cicalo, L. Cifarelli, F. Cindolo,J. Cleymans,O. Cobanoglu,J.-P. Coffin,S. Coli,A. Colla,G. Conesa Balbastre,Z. Conesa del Valle,E. S. Conner,P. Constantin,G. Contin,J. G. Contreras,Y. Corrales Morales, T. M. Cormier,P. Cortese,I. Cortés Maldonado,M. R. Cosentino,F. Costa,M. E. Cotallo,E. Crescio,P. Crochet,E. Cuautle,L. Cunqueiro,J. Cussonneau,A. Dainese,H. H. Dalsgaard,A. Danu,I. Das,A. Dash,S. Dash,G. O. V. de Barros,A. De Caro,G. de Cataldo,J. de Cuveland,A. De Falco,M. De Gaspari,J. de Groot,D. De Gruttola,N. De Marco,S. De Pasquale,R. De Remigis,R. de Rooij,G. de Vaux,H. Delagrange,Y. Delgado,G. Dellacasa,A. Deloff,V. Demanov,E. Dénes,A. Deppman,G. D’Erasmo,D. Derkach,A. Devaux,D. Di Bari,C. Di Giglio,S. Di Liberto,A. Di Mauro,P. Di Nezza,M. Dialinas,L. Díaz,R. Díaz, T. Dietel,R. Divià,Ø. Djuvsland,V. Dobretsov,A. Dobrin,T. Dobrowolski,B. Dönigus,I. Domínguez,D. M. M. Don,O. Dordic,A. K. Dubey,J. Dubuisson,L. Ducroux,P. Dupieux,A. K. Dutta Majumdar,M. R. Dutta Majumdar,D. Elia,D. Emschermann,H. Engel,A. Enokizono,B. Espagnon,M. Estienne, S. Esumi,D. Evans,S. Evrard,G. Eyyubova,C. W. Fabjan,D. Fabris,J. Faivre,D. Falchieri,A. Fantoni,M. Fasel,O. Fateev,R. Fearick,A. Fedunov,D. Fehlker,V. Fekete,D. Felea,B. Fenton-Olsen,G. Feofilov,A. Fernández Téllez,E. G. Ferreiro, A. Ferretti,R. Ferretti,M. A. S. Figueredo,S. Filchagin,R. Fini,F. M. Fionda,E. M. Fiore,M. Floris,Z. Fodor,S. Foertsch,P. Foka,S. Fokin,F. Formenti,E. Fragiacomo,M. Fragkiadakis,U. Frankenfeld,A. Frolov,U. Fuchs,F. Furano,C. Furget,M. Fusco Girard,J. J. Gaardhøje,S. Gadrat,M. Gagliardi,A. Gago,M. Gallio,P. Ganoti,M. S. Ganti,C. Garabatos,C. García Trapaga,J. Gebelein,R. Gemme,M. Germain, A. Gheata,M. Gheata,B. Ghidini,P. Ghosh,G. Giraudo,P. Giubellino,E. Gladysz-Dziadus,R. Glasow,P. Glässel,A. Glenn,R. Gómez Jiménez,H. González Santos,L. H. González-Trueba, P. González-Zamora,S. Gorbunov,Y. Gorbunov,S. Gotovac,H. Gottschlag, V. Grabski,R. Grajcarek,A. Grelli,A. Grigoras,C. Grigoras,V. Grigoriev,A. Grigoryan,S. Grigoryan,B. Grinyov,N. Grion,P. Gros,J. F. Grosse-Oetringhaus,J.-Y. Grossiord,R. Grosso,F. Guber,R. Guernane,C. Guerra,B. Guerzoni,K. Gulbrandsen,H. Gulkanyan,T. Gunji, A. Gupta, R. Gupta,H.-A. Gustafsson,H. Gutbrod,Ø. Haaland, C. Hadjidakis,M. Haiduc,H. Hamagaki,G. Hamar,J. Hamblen,B. H. Han, J. W. Harris,M. Hartig,A. Harutyunyan,D. Hasch,D. Hasegan,D. Hatzifotiadou,A. Hayrapetyan,M. Heide,M. Heinz,H. Helstrup,A. Herghelegiu,C. Hernández,G. Herrera Corral,N. Herrmann,K. F. Hetland,B. Hicks,A. Hiei,P. T. Hille,B. Hippolyte,T. Horaguchi,Y. Hori,P. Hristov,I. Hřivnáčová,S. Hu,M. Huang,S. Huber,T. J. Humanic,D. Hutter,D. S. Hwang,R. Ichou,R. Ilkaev,I. Ilkiv,M. Inaba,P. G. Innocenti,M. Ippolitov,M. Irfan,C. Ivan, A. Ivanov,M. Ivanov,V. Ivanov,T. Iwasaki,A. Jachołkowski, P. Jacobs,L. Jančurová,S. Jangal,R. Janik,C. Jena,S. Jena,L. Jirden,G. T. Jones, P. G. Jones,P. Jovanović, H. Jung,W. Jung,A. Jusko,A. B. Kaidalov,S. Kalcher,P. Kaliňák,M. Kalisky,T. Kalliokoski,A. Kalweit,A. Kamal,R. Kamermans,K. Kanaki,E. Kang, J. H. Kang,J. Kapitan,V. Kaplin,S. Kapusta,O. Karavichev,T. Karavicheva,E. Karpechev,A. Kazantsev,U. Kebschull,R. Keidel,M. M. Khan,S. A. Khan,A. Khanzadeev,Y. Kharlov,D. Kikola,B. Kileng,D. J. Kim,D. S. Kim,D. W. Kim,H. N. Kim,J. Kim,J. H. Kim,J. S. Kim,M. Kim, S. H. Kim,S. Kim,Y. Kim,S. Kirsch,I. Kisel,S. Kiselev,A. Kisiel,J. L. Klay,J. Klein,C. Klein-Bösing,M. Kliemant,A. Klovning,A. Kluge,M. L. Knichel,S. Kniege,K. Koch,R. Kolevatov,A. Kolojvari,V. Kondratiev,N. Kondratyeva,A. Konevskih,E. Kornaś,R. Kour,M. Kowalski,S. Kox,K. Kozlov,J. Kral,I. Králik,F. Kramer,I. Kraus,A. Kravčáková,T. Krawutschke,M. Krivda,D. Krumbhorn,M. Krus,E. Kryshen,M. Krzewicki,Y. Kucheriaev,C. Kuhn,P. G. Kuijer,L. Kumar,N. Kumar,R. Kupczak,P. Kurashvili,A. Kurepin,A. N. Kurepin,A. Kuryakin,S. Kushpil,V. Kushpil,M. Kutouski,H. Kvaerno,M. J. Kweon,Y. Kwon,P. La Rocca,F. Lackner,P. Ladrón de Guevara,V. Lafage,C. Lal,C. Lara,D. T. Larsen,G. Laurenti,C. Lazzeroni,Y. Le Bornec,N. Le Bris,H. Lee,K. S. Lee, S. C. Lee,F. Lefèvre,M. Lenhardt,L. Leistam,J. Lehnert,V. Lenti,H. León,I. León Monzón,H. León Vargas,P. Lévai,X. Li, Y. Li,R. Lietava,S. Lindal,V. Lindenstruth,C. Lippmann,M. A. Lisa,L. Liu,V. Loginov,S. Lohn,X. Lopez,M. López Noriega,R. López-Ramírez,E. López Torres,G. Løvhøiden,A. Lozea Feijo Soares,S. Lu,M. Lunardon,G. Luparello,L. Luquin,J.-R. Lutz,K. Ma,R. Ma,D. M. Madagodahettige-Don,A. Maevskaya,M. Mager,D. P. Mahapatra,A. Maire,I. Makhlyueva,D. Mal’Kevich,M. Malaev,K. J. Malagalage,I. Maldonado Cervantes,M. Malek,T. Malkiewicz,P. Malzacher,A. Mamonov,L. Manceau,L. Mangotra,V. Manko,F. Manso,V. Manzari,Y. Mao, J. Mareš,G. V. Margagliotti, A. Margotti,A. Marín,I. Martashvili,P. Martinengo,M. I. Martínez Hernández,A. Martínez Davalos,G. Martínez García,Y. Maruyama,A. Marzari Chiesa,S. Masciocchi,M. Masera,M. Masetti, A. Masoni,L. Massacrier,M. Mastromarco,A. Mastroserio,Z. L. Matthews,A. Matyja,D. Mayani,G. Mazza,M. A. Mazzoni,F. Meddi,A. Menchaca-Rocha,P. Mendez Lorenzo,M. Meoni,J. Mercado Pérez,P. Mereu, Y. Miake,A. Michalon,N. Miftakhov,L. Milano,J. Milosevic,F. Minafra,A. Mischke,D. Miśkowiec,C. Mitu,K. Mizoguchi,J. Mlynarz,B. Mohanty,L. Molnar,M. M. Mondal,L. Montaño Zetina,M. Monteno,E. Montes,M. Morando,S. Moretto,A. Morsch,T. Moukhanova, V. Muccifora,E. Mudnic,S. Muhuri,H. Müller, M. G. Munhoz,J. Munoz,L. Musa,A. Musso,B. K. Nandi, R. Nania,E. Nappi,F. Navach,S. Navin,T. K. Nayak,S. Nazarenko,G. Nazarov,A. Nedosekin,F. Nendaz,J. Newby,A. Nianine,M. Nicassio,B. S. Nielsen,S. Nikolaev,V. Nikolic,S. Nikulin,V. Nikulin,B. S. Nilsen,M. S. Nilsson,F. Noferini,P. Nomokonov,G. Nooren,N. Novitzky,A. Nyatha,C. Nygaard,A. Nyiri, J. Nystrand,A. Ochirov,G. Odyniec,H. Oeschler,M. Oinonen,K. Okada,Y. Okada,M. Oldenburg,J. Oleniacz,C. Oppedisano,F. Orsini,A. Ortiz Velasquez,G. Ortona,A. Oskarsson,F. Osmic,L. Österman,P. Ostrowski,I. Otterlund,J. Otwinowski,G. Øvrebekk,K. Oyama,K. Ozawa,Y. Pachmayer,M. Pachr,F. Padilla,P. Pagano,G. Paić,F. Painke,C. Pajares,S. Pal, S. K. Pal,A. Palaha,A. Palmeri,R. Panse,V. Papikyan,G. S. Pappalardo,W. J. Park,B. Pastirčák,C. Pastore,V. Paticchio,A. Pavlinov,T. Pawlak,T. Peitzmann,A. Pepato,H. Pereira,D. Peressounko,C. Pérez,D. Perini,D. Perrino, W. Peryt,J. Peschek,A. Pesci,V. Peskov,Y. Pestov,A. J. Peters,V. Petráček,A. Petridis,M. Petris,P. Petrov,M. Petrovici,C. Petta,J. Peyré,S. Piano,A. Piccotti,M. Pikna,P. Pillot,O. Pinazza,L. Pinsky,N. Pitz,F. Piuz,R. Platt,M. Płoskoń,J. Pluta,T. Pocheptsov,S. Pochybova,P. L. M. Podesta Lerma,F. Poggio,M. G. Poghosyan,K. Polák,B. Polichtchouk,P. Polozov,V. Polyakov,B. Pommeresch,A. Pop,F. Posa,V. Pospíšil,B. Potukuchi,J. Pouthas,S. K. Prasad,R. Preghenella,F. Prino,C. A. Pruneau,I. Pshenichnov,G. Puddu,P. Pujahari,A. Pulvirenti,A. Punin,V. Punin,M. 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EUROPEAN PHYSICAL JOURNAL C（2011）
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摘要
The production of pi(+), pi(-), K+, K-, p, and (p) over bar at mid-rapidity has been measured in proton-proton collisions at root s = 900 GeV with the ALICE detector. Particle identification is performed using the specific energy loss in the inner tracking silicon detector and the time projection chamber. In addition, time-of-flight information is used to identify hadrons at higher momenta. Finally, the distinctive kink topology of the weak decay of charged kaons is used for an alternative measurement of the kaon transverse momentum (p(t)) spectra. Since these various particle identification tools give the best separation capabilities over different momentum ranges, the results are combined to extract spectra from p(t) = 100 MeV/c to 2.5 GeV/c. The measured spectra are further compared with QCD-inspired models which yield a poor description. The total yields and the mean pt are compared with previous measurements, and the trends as a function of collision energy are discussed.
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