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Production of π0 an...
Production of π0 and η mesons up to high transverse momentum in pp collisions at 2.76 TeV
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- Acharya, S (author)
- Variable Energy Cyclotron Centre
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- Adamova, D. (author)
- Nuclear Physics Institute of the Academy of Sciences, Czech Republic
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- Aggarwal, M.M (author)
- Panjab University
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- Aglieri Rinella, G (author)
- CERN
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- Agnello, M. (author)
- Polytechnic University of Turin
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- Agrawal, N (author)
- Indian Institute of Technology, Bombay
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- Christiansen, Peter (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Ljunggren, Martin (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Oskarsson, Anders (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Richert, Tuva (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Silvermyr, David (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Stenlund, Evert (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Vislavicius, Vytautas (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
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- 2017-05-22
- 2017
- English.
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In: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 77:5
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http://dx.doi.org/10... (free)
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Abstract
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- The invariant differential cross sections for inclusive π0 and 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 pT 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-pT neutral 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 π0 and η meson production. © 2017, CERN for the benefit of the ALICE collaboration.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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- art (subject category)
- ref (subject category)
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Acharya, S
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Adamova, D.
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Aggarwal, M.M
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Aglieri Rinella, ...
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Agnello, M.
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Agrawal, N
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Christiansen, Pe ...
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Ljunggren, Marti ...
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Oskarsson, Ander ...
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Richert, Tuva
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Silvermyr, David
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Stenlund, Evert
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Vislavicius, Vyt ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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European Physica ...
- By the university
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Lund University