Production of π0 and [eta] mesons up to high transverse momentum in pp collisions at 2.76 TeV
The invariant differential cross sections for inclusive π0π0\pi ^{0} and ηη\eta mesons at midrapidity were measured in pp collisions at s√=2.76s=2.76\sqrt{s}=2.76 TeV for transverse momenta 0.4<pT<400.4<pT<400.4<p_{\mathrm {T}}<40 GeV/c and 0.6<pT<200.6<pT<200.6<p_{\...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
22 May 2017
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| In: |
The European physical journal. C, Particles and fields
Year: 2017, Volume: 77, Issue: 5 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-017-4890-x |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1140/epjc/s10052-017-4890-x Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjc/s10052-017-4890-x 
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| Author Notes: | ALICE Collaboration* |
MARC
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| 245 | 1 | 0 | |a Production of π0 and [eta] mesons up to high transverse momentum in pp collisions at 2.76 TeV |c ALICE Collaboration* |
| 246 | 3 | 0 | |a η |
| 246 | 3 | 3 | |a Production of pi 0 and eta mesons up to high transverse momentum in pp collisions at 2.76 TeV |
| 264 | 1 | |c 22 May 2017 | |
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| 500 | |a Im Titel wird das Zeichen "0" hochgestellt | ||
| 500 | |a Im Titel werden "pi" und "eta" als griechische Buchstaben dargestellt | ||
| 500 | |a The ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, A. Deisting, P. Glässel, J. Kim, S. Klewin, L. Leardini, J. Mercado Pérez, H. Oeschler, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, M.O. Schmidt, S. Schuchmann, J. Stachel, D.F. Weiser, J. Wilkinson, B. Windelband, A. Zimmermann [und weitere] | ||
| 500 | |a Gesehen am 02.10.2018 | ||
| 520 | |a The invariant differential cross sections for inclusive π0π0\pi ^{0} and ηη\eta mesons at midrapidity were measured in pp collisions at s√=2.76s=2.76\sqrt{s}=2.76 TeV for transverse momenta 0.4<pT<400.4<pT<400.4<p_{\mathrm {T}}<40 GeV/c and 0.6<pT<200.6<pT<200.6<p_{\mathrm {T}}<20 GeV/c, respectively, using the ALICE detector. This large range in pTpTp_{\mathrm {T}} was 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-pTpTp_{\mathrm {T}} neutral pions, which exploits that the showers originating from their decay photons overlap in the EMCal. Above 4 GeV/ccc, 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 π0π0\pi ^{0}, and between 30-50% for the ηη\eta meson, while generator-level simulations with PYTHIA 8.2 describe the data to better than 10-30%, except at pT<1pT<1p_{\mathrm {T}}<1 GeV/ccc. The new data can therefore be used to further improve the theoretical description of π0π0\pi ^{0} and ηη\eta meson production. | ||
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