Midrapidity antiproton-to-proton ratio in pp collisons at sqrt[s]=0.9 and 7 TeV measured by the ALICE experiment.

Aamodt K, Abel N, Abeysekara U, Abrahantes Quintana A, Abramyan A, Adamová D, Aggarwal MM, Aglieri Rinella G, Agocs AG, Aguilar Salazar S, Ahammed Z, Ahmad A, Ahmad N, Ahn SU, Akimoto R, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Almaráz Aviña E, Alme J, Alt T, Altini V, Altinpinar S, Andrei C, Andronic A, Anelli G, Angelov V, Anson C, Anticić T, Antinori F, Antinori S, Antipin K, Antończyk D, Antonioli P, Anzo A, Aphecetche L, Appelshäuser H, Arcelli S, Arceo R, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bablok S, Bach M, Badalà A, Baek YW, Bagnasco S, Bailhache R, Bala R, Baldisseri A, Baldit A, Bán J, Barbera R, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Barile F, Basile M, Basmanov V, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Becker B, Belikov I, Bellwied R, Belmont-Moreno E, Belogianni A, Benhabib L, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielcík J, Bielcíková J, Bilandzic A, Bimbot L, Biolcati E, Blanc A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Bohm J, Boldizsár L, Bombara M, Bombonati C, Bondila M, Borel H, Borisov A, Bortolin C, Bose S, Bosisio L, Bossú F, Botje M, Böttger S, Bourdaud G, Boyer B, Braun M, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Bruckner G, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Buncic P, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo E, Camacho E, Camerini P, Campbell M, Canoa Roman V, Capitani GP, Cara Romeo G, Carena F, Carena W, Carminati F, Casanova Díaz A, Caselle M, Castillo Castellanos J, Castillo Hernandez JF, Catanescu V, Cattaruzza E, Cavicchioli C, Cerello P, Chambert V, Chang B, Chapeland S, Charpy A, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Choi K, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Chuman F, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Cobanoglu O, Coffin JP, Coli S, Colla A, Conesa Balbastre G, Conesa Del Valle Z, Conner ES, Constantin P, Contin G, Contreras JG, Corrales Morales Y, Cormier TM, Cortese P, Cortés Maldonado I, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Cussonneau J, Dainese A, Dalsgaard HH, Danu A, Das I, Dash A, Dash S, de Barros GO, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gaspari M, de Groot J, De Gruttola D, De Marco N, De Pasquale S, De Remigis R, de Rooij R, de Vaux G, Delagrange H, Delgado Y, Dellacasa G, Deloff A, Demanov V, Dénes E, Deppman A, D'Erasmo G, Derkach D, Devaux A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dialinas M, Díaz L, Díaz R, Dietel T, Divià R, Djuvsland O, Dobretsov V, Dobrin A, Dobrowolski T, Dönigus B, Domínguez I, Don DM, Dordic O, Dubey AK, Dubuisson J, Ducroux L, Dupieux P, Dutta Majumdar AK, Dutta Majumdar MR, Elia D, Emschermann D, Enokizono A, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fateev O, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Fenton-Olsen B, Feofilov G, Fernández Téllez A, Ferreiro EG, Ferretti A, Ferretti R, Figueredo MA, Filchagin S, Fini R, Fionda FM, Fiore EM, Floris M, Fodor Z, Foertsch S, Foka P, Fokin S, Formenti F, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Frolov A, Fuchs U, Furano F, Furget C, Fusco Girard M, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Ganoti P, Ganti MS, Garabatos C, García Trapaga C, Gebelein J, Gemme R, Germain M, Gheata A, Gheata M, Ghidini B, Ghosh P, Giraudo G, Giubellino P, Gladysz-Dziadus E, Glasow R, Glässel P, Glenn A, Gómez Jiménez R, González Santos H, González-Trueba LH, González-Zamora P, Gorbunov S, Gorbunov Y, Gotovac S, Gottschlag

Abstract

The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[s]=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45