Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays

R Aaij; LHCb Collaboration

doi:10.1103/PhysRevLett.113.151601

Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays

R Aaij, LHCb Collaboration

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Abstract

A measurement of the ratio of the branching fractions of the B+→K+μ+μ- and B+→K+e+e- decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb-1, recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1<q2<6 GeV2/c4 is measured to be 0.745-0.074+0.090(stat)±0.036(syst). This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the standard model prediction within 2.6 standard deviations.

Original language	English
Article number	151601
Number of pages	10
Journal	Physical Review Letters
Volume	113
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.113.151601
Publication status	Published - 6 Oct 2014

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@article{209538d355c944e0af321e4da97f4df7,

title = "Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays",

abstract = "A measurement of the ratio of the branching fractions of the B+→K+μ+μ- and B+→K+e+e- decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb-1, recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1<q2<6 GeV2/c4 is measured to be 0.745-0.074+0.090(stat)±0.036(syst). This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the standard model prediction within 2.6 standard deviations.",

author = "Jonas Rademacker and Konstantinos Petridis and Nicola Skidmore and Claire Prouve and Daniel Saunders and {Souza Covacich}, Daniel and Jaap Velthuis and Sophie Richards and R Aaij and {LHCb Collaboration} and Jack Benton and Brook, {Nick H} and Andrew Cook and Coombes, {Matthew P} and Dalseno, {Jeremy P} and Hampson, {Tom R} and Harnew, {Sam T} and Paras Naik and Price, {Eugenia P} and Voong, {David K}",

year = "2014",

month = oct,

day = "6",

doi = "10.1103/PhysRevLett.113.151601",

language = "English",

volume = "113",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "15",

}

TY - JOUR

T1 - Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays

AU - Rademacker, Jonas

AU - Petridis, Konstantinos

AU - Skidmore, Nicola

AU - Prouve, Claire

AU - Saunders, Daniel

AU - Souza Covacich, Daniel

AU - Velthuis, Jaap

AU - Richards, Sophie

AU - Aaij, R

AU - LHCb Collaboration

AU - Benton, Jack

AU - Brook, Nick H

AU - Cook, Andrew

AU - Coombes, Matthew P

AU - Dalseno, Jeremy P

AU - Hampson, Tom R

AU - Harnew, Sam T

AU - Naik, Paras

AU - Price, Eugenia P

AU - Voong, David K

PY - 2014/10/6

Y1 - 2014/10/6

N2 - A measurement of the ratio of the branching fractions of the B+→K+μ+μ- and B+→K+e+e- decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb-1, recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1<q2<6 GeV2/c4 is measured to be 0.745-0.074+0.090(stat)±0.036(syst). This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the standard model prediction within 2.6 standard deviations.

AB - A measurement of the ratio of the branching fractions of the B+→K+μ+μ- and B+→K+e+e- decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb-1, recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1<q2<6 GeV2/c4 is measured to be 0.745-0.074+0.090(stat)±0.036(syst). This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the standard model prediction within 2.6 standard deviations.

UR - http://inspirehep.net/record/1303108?ln=en

U2 - 10.1103/PhysRevLett.113.151601

DO - 10.1103/PhysRevLett.113.151601

M3 - Article (Academic Journal)

C2 - 25375701

SN - 0031-9007

VL - 113

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151601

ER -

Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays

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PrecisionFlavour: Particle Physics Beyond the Energy Frontier (ERC 2011)

Professor Jonas H Rademacker

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Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays

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Professor Jonas H Rademacker

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