Global fits to $b \to s\ell\ell$ data and signs for lepton non-universality - INSPIRE

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Global fits to $b \to s\ell\ell$ data and signs for lepton non-universality

T. Hurth
(
- U. Mainz, PRISMA
)
,
F. Mahmoudi
(
- Lyon U. and
- Lyon Observ. and
- Lyon, Ecole Normale Superieure and
- CERN
)
,
S. Neshatpour
(
- IPM, Tehran
)

Oct 16, 2014

15 pages

Published in:

JHEP 12 (2014) 053

Published: Dec 5, 2014

e-Print:

1410.4545 [hep-ph]

DOI:

10.1007/JHEP12(2014)053

Report number:

CERN-PH-TH-2014-198,
MITP-14-078

View in:

reference search156 citations

Citations per year

Abstract: (Springer)

There are some slight tensions with the SM predictions within the latest LHCb measurements. Besides the known anomaly in one angular observable of the rare decay B → K

^{*}

μ

^{+}

μ

^{−}

, another small discrepancy recently occurred. The ratio R

_{K}

= BR(B

^{+}

→ K

^{+}

μ

^{+}

μ

^{−}

)/BR(B

^{+}

→ K

^{+}

e

^{+}

e

^{−}

) in the low-q

^{2}

region has been measured by LHCb showing a 2.6σ deviation from the SM prediction. In contrast to the anomaly in the rare decay B → K

^{*}

μ

^{+}

μ

^{−}

which is affected by power corrections, the ratio R

_{K}

is theoretically rather clean. We analyse all the b → sℓℓ data with global fits and in particular explore the possibility of breaking of lepton universality. Possible cross-checks with an analysis of the inclusive B → X

_{s}

ℓ

^{+}

ℓ

^{−}

decay are also explored.

Note:

15 pages, 11 figures. v2: references added, published in JHEP

Rare Decays
Beyond Standard Model
B-Physics
new physics: signature
lepton: universality: violation
B+: semileptonic decay
B+: rare decay
B+: branching ratio
branching ratio: ratio
strange meson: final state

References(62)

Figures(19)

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)
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)

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(
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)
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(
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)

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(
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)
,
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(
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)
,
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(
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)
,
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(
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)

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(
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et al.

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(
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(
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)

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(
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(
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)
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(
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)

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(
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(
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)
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(
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- IBS, Daejeon, CTPU
)
,
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(
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- Korea Inst. Advanced Study, Seoul
)

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(
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(
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)

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