Update of the LHCb combination of the CKM angle $\gamma$ - INSPIRE

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Update of the LHCb combination of the CKM angle $\gamma$

LHCb

Collaboration

•

Matthew William Kenzie
(
- Cambridge U.
)

May 21, 2018

29 pages

Report number:

LHCb-CONF-2018-002,
CERN-LHCb-CONF-2018-002

Experiments:

CERN-LHC-LHCb

View in:

CERN Document Server

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Abstract:

A combination of tree-level measurements of the CKM angle

\gamma

at LHCb is performed. The results are obtained from time-integrated measurements of

B^{+}\to D K^{+}

,

B^{+}\to D^{*}K^{+}

,

B^{+}\to DK^{*+}

,

B^{0}\to D K^{*0}

,

B^{0}\to D K^{+}\pi^{-}

and

B^{+}\to DK^{+}\pi^{+}\pi^{-}

decays and time-dependent analyses of

B_{s}^{0}\to D_{s}^{\mp}K^{\pm}

and

B^{0}\to D^{\mp}\pi^{\pm}

decays. This combination includes new and updated results compared to the previous LHCb combination, giving a best fit value of

\gamma = 74.0^\circ

with confidence intervals, set using a frequentist procedure, of

\gamma \in [68.2,79.0]^\circ

at 68.3 % confidence level (CL) and

\gamma \in [61.6,83.7]^\circ

at 95.5 % CL, where all values are modulo

180^\circ

. This gives the result \begin{align*} \gamma = (74.0^{+5.0}_{-5.8})^\circ\,, \end{align*} where the uncertainty includes both statistical and systematic contributions.

Note:

Preliminary results

LHCb
p p: scattering
p p: colliding beams
B+: hadronic decay
B0: hadronic decay
B/s0: hadronic decay
LHC-B
CERN LHC Coll
CKM matrix
tree approximation

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Figures(43)

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•

Roel Aaij
(
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•
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•
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