J/ψ production as a function of charged particle multiplicity in pp collisions at s=7TeV

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Abstract

The ALICE Collaboration reports the measurement of the relative J/ψ yield as a function of charged particle pseudorapidity density dNch/dη in pp collisions at s=7TeV at the LHC. J/ψ particles are detected for pt>0, in the rapidity interval |y|+e-, and in the interval 2.5+μ- pairs. An approximately linear increase of the J/ψ yields normalized to their event average (dNJ/ψ/dy)/〈 dNJ/ψ/dy〉 with (dNch/dη)/〈 dNch/dη〉 is observed in both rapidity ranges, where dNch/dη is measured within |η|t>0. In the highest multiplicity interval with 〈 dNch/dη(bin)〉 =24.1, corresponding to four times the minimum bias multiplicity density, an enhancement relative to the minimum bias J/ψ yield by a factor of about 5 at 2.5

Original languageEnglish
Pages (from-to)165-175
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume712
Issue number3
DOIs
StatePublished - Jun 6 2012

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Abelev, B., Adam, J., Adamová, D., Adare, A. M., Aggarwal, M. M., Aglieri Rinella, G., Agocs, A. G., Agostinelli, A., Aguilar Salazar, S., Ahammed, Z., Ahmad Masoodi, A., Ahmad, N., Ahn, S. U., Akindinov, A., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., Alkin, A., ... Zynovyev, M. (2012). J/ψ production as a function of charged particle multiplicity in pp collisions at s=7TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 712(3), 165-175. https://doi.org/10.1016/j.physletb.2012.04.052