Production of π0 and η mesons up to high transverse momentum in pp collisions at 2.76 TeV
ALICE Collaboration. (2017). Production of π0 and η mesons up to high transverse momentum in pp collisions at 2.76 TeV. European Physical Journal C, 77(5), Article 339. https://doi.org/10.1140/epjc/s10052-017-4890-x
Julkaistu sarjassa
European Physical Journal CTekijät
Päivämäärä
2017Tekijänoikeudet
© CERN for the benefit of the CMS collaboration 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License. Funded by SCOAP3.
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 highpT
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.
...
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Julkaisija
Springer Berlin HeidelbergISSN Hae Julkaisufoorumista
1434-6044
Huom.
An erratum to this article is available at https://doi.org/10.1140/epjc/s10052-017-5144-7
Katso myös
https://doi.org/10.1140/epjc/s10052-017-5144-7Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/27052244
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