| Autor: |
Acharya, S, Adamová, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, Ahn, SU, Aiola, S, Akindinov, A, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alexandre, D, Molina, RA, Alici, A, Alkin, A, Alme, J, Alt, T, Altsybeev, I, Prado, CAG, An, M, Andrei, C, Andrews, HA, Andronic, A, Anguelov, V, Anson, C, Antičić, T, Antinori, F, Antonioli, P, Anwar, R, Aphecetche, L, Appelshäuser, H, Arcelli, S, Arnaldi, R, Arnold, OW, Arsene, IC, Arslandok, M, Audurier, B, Augustinus, A, Averbeck, R, Awes, T, Azmi, MD, Badalà, A, Baek, YW, Bagnasco, S, Bailhache, R, Bala, R, Baldisseri, A, Ball, M, Baral, RC, Barbano, AM, Barbera, R, Barile, F, Barioglio, L, Barnaföldi, GG, Barnby, LS, Barret, V, Bartalini, P, Barth, K, Bartke, J, Bartsch, E, Basile, M, Bastid, N, Basu, S, Bathen, B, Batigne, G, Camejo, AB, Batyunya, B, Batzing, PC, Bearden, IG, Beck, H, Bedda, C, Behera, NK, Belikov, I, Bellini, F, Martinez, HB, Bellwied, R, Beltran, LGE, Belyaev, V, Bencedi, G, Beole, S, Bercuci, A, Berdnikov, Y, Berenyi, D, Bertens, RA, Berzano, D, Betev, L, Bhasin, A, Bhat, IR, Bhati, AK, Bhattacharjee, B |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Acharya, S; Adamová, D; Aggarwal, MM; Rinella, GA; Agnello, M; Agrawal, N; et al.(2017). Production of π0and η mesons up to high transverse momentum in pp collisions at 2.76 TeV. European Physical Journal C, 77(5). doi: 10.1140/epjc/s10052-017-4890-x. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/9h14v6w6 |
| DOI: |
10.1140/epjc/s10052-017-4890-x. |
| Popis: |
© 2017, CERN for the benefit of the ALICE collaboration. The invariant differential cross sections for inclusive π0and η mesons at midrapidity were measured in pp collisions at s=2.76 TeV for transverse momenta 0.4 < pT< 40 GeV/c and 0.6 < pT< 20 GeV/c, respectively, using the ALICE detector. This large range in pTwas achieved by combining various analysis techniques and different triggers involving the electromagnetic calorimeter (EMCal). In particular, a new single-cluster, shower-shape based method was developed for the identification of high-pTneutral pions, which exploits that the showers originating from their decay photons overlap in the EMCal. Above 4 GeV/c, the measured cross sections are found to exhibit a similar power-law behavior with an exponent of about 6.3. Next-to-leading-order perturbative QCD calculations differ from the measured cross sections by about 30% for the π0, and between 30–50% for the η meson, while generator-level simulations with PYTHIA 8.2 describe the data to better than 10–30%, except at pT< 1 GeV/c. The new data can therefore be used to further improve the theoretical description of π0and η meson production. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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