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Suppression of Upsilon excited states in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV

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arxiv 1105.4894 v1 pith:F22T4ZVE submitted 2011-05-24 nucl-ex

CMS Collaboration This is my paper · ORCID
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keywords upsilonpbpbcollisionscentre-of-massdoubleenergyexcitedratio
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A comparison of the relative yields of Upsilon resonances in the mu(+) mu(-) decay channel in PbPb and pp collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV, is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4 GeV/c and pseudorapidity below 2.4, the double ratio of the Upsilon(2S) and Upsilon(3S) excited states to the Upsilon(1S) ground state in PbPb and pp collisions,(Upsilon(2S+3S)/Upsilon(1S)[PbPb])/(Upsilon(2S+3S)/Upsilon(1S)[pp]), is found to be 0.31 - 0.15 + 0.19 (stat.) +/- 0.03 (syst.). The probability to obtain the measured value, or lower, if the true double ratio is unity, has been calculated to be less than 1%.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Evidence for sequential $\Upsilon$(nS) suppression in light ion collisions

    nucl-ex 2026-07 conditional novelty 6.0 of 10

    First evidence of sequential Upsilon(nS) suppression in oxygen-oxygen and neon-neon collisions, with the Upsilon(3S)/Upsilon(2S) ratio reduced by 3.2 standard deviations.

  2. The NRQCD $\Upsilon$ spectrum at non-zero temperature using Backus-Gilbert regularisations

    hep-lat 2025-02 conditional novelty 4.0 of 10

    On FASTSUM Generation 2L ensembles, Backus-Gilbert and Tikhonov reconstructions agree on the Upsilon ground-state mass, but the decay width is dominated by reconstruction smearing and high-temperature broadening is un...

  3. Non-relativistic QCD Study of Excited Bottomonia at Finite Temperatures on a Fine Lattice

    hep-lat 2025-01 conditional novelty 4.0 of 10

    Excited bottomonia in a quark-gluon plasma acquire temperature-dependent widths with no significant mass shifts, according to a Gaussian model fit to lattice NRQCD correlators.

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