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Bose-Einstein correlations of same-sign charged pions in the forward region in pp collisions at √s= 7 TeV

MPS-Authors
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Dembinski,  H. P.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Popov,  D.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertiaev,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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1709.01769.pdf
(Preprint), 604KB

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Citation

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2017). Bose-Einstein correlations of same-sign charged pions in the forward region in pp collisions at √s= 7 TeV. Journal of high energy physics: JHEP, 2017: 025. doi:10.1007/JHEP12(2017)025.


Cite as: https://hdl.handle.net/21.11116/0000-0005-7CE7-C
Abstract
Bose-Einstein correlations of same-sign charged pions, produced in
proton-proton collisions at a 7 TeV centre-of-mass energy, are studied using a
data sample collected by the LHCb experiment. The signature for Bose-Einstein
correlations is observed in the form of an enhancement of pairs of like-sign
charged pions with small four-momentum difference squared. The charged-particle
multiplicity dependence of the Bose-Einstein correlation parameters describing
the correlation strength and the size of the emitting source is investigated,
determining both the correlation radius and the chaoticity parameter. The
measured correlation radius is found to increase as a function of increasing
charged-particle multiplicity, while the chaoticity parameter is seen to
decrease.