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dc.contributor.authorAcharya, Shreyasipt_BR
dc.contributor.authorGay Ducati, Maria Beatrizpt_BR
dc.contributor.authorPereira, Luis Gustavopt_BR
dc.contributor.authorPezzi, Rafael Perettipt_BR
dc.contributor.authorALICE Collaborationpt_BR
dc.date.accessioned2018-08-31T02:29:05Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn1434-6044pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/181523pt_BR
dc.description.abstractThe 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 newsingle-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.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofThe European physical journal. C, Particles and fields. Berlin. Vol. 77, no. 5 (May 2017), 339, 25 p.pt_BR
dc.rightsOpen Accessen
dc.subjectAceleradores de partículaspt_BR
dc.subjectColisao de ions pesadospt_BR
dc.subjectColisões proton-protonpt_BR
dc.subjectProducao de mesonspt_BR
dc.titleProduction of π0 and η mesons up to high transverse momentum in pp collisions at 2.76 TeVpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001049612pt_BR
dc.type.originEstrangeiropt_BR


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