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- W2587822336 abstract "The invariant differential cross sections for inclusive $pi^{0}$ and $eta$ mesons at midrapidity were measured in pp collisions at $sqrt{s}=2.76$ TeV for transverse momenta $0.4<p_{rm T}<40$ GeV/$c$ and $0.6<p_{rm T}<20$ GeV/$c$, respectively, using the ALICE detector. This large range in $p_{rm T}$ 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-$p_{rm T}$ neutral pions, which exploits that the showers originating from their decay photons overlap in the EMCal. 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 $pi^0$, and between $30$-$50$% for the $eta$ meson, while generator-level simulations with PYTHIA 8.2 describe the data to better than $10$-$30$%, except at $p_{rm T}<1$ GeV/$c$. The new data can therefore be used to further improve the theoretical description of $pi^{0}$ and $eta$ meson production." @default.
- W2587822336 created "2017-02-24" @default.
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