First measurement of the $CP$-violating phase $\phi_s^{d\overline{d}}$ in $B_s^0\to(K^+\pi^-)(K^-\pi^+)$ decays

Aaij, Roel; Adeva, Bernardo; Adinolfi, Marco; Ajaltouni, Ziad; Akar, Simon; Albrecht, Johannes; Alessio, Federico; Alexander, Michael; Alfonso Albero, Alejandro; Ali, Suvayu

doi:10.1007/JHEP03(2018)140

First measurement of the $CP$ -violating phase $\phi_s^{d\overline{d}}$ in $B_s^0\to(K^+\pi^-)(K^-\pi^+)$ decays

LHCb

Collaboration

Dec 22, 2017

33 pages

Published in:

JHEP 03 (2018) 140

Published: Mar 23, 2018

e-Print:

1712.08683 [hep-ex]

DOI:

10.1007/JHEP03(2018)140

PDG:

\Gamma _{L}/\Gamma

in

{{\mathit B}_{{{s}}}^{0}}

\rightarrow

{{\mathit K}^{*}{(892)}^{0}}{{\overline{\mathit K}}_{{{2}}}^{*}{(1430)}^{0}}

Report number:

LHCB-PAPER-2017-048,
CERN-EP-2017-320

Experiments:

CERN-LHC-LHCb

View in:

links

reference search42 citations

Citations per year

Abstract: (Springer)

A flavour-tagged decay-time-dependent amplitude analysis of B

_{s}^{0}

→ (K

^{+}

π

^{−}

)(K

^{−}

π

^{+}

) decays is presented in the K

^{±}

π

^{∓}

mass range from 750 to 1600MeV/c

^{2}

. The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb

^{−1}

. Several quasi-two-body decay modes are considered, corresponding to K

^{±}

π

^{∓}

combinations with spin 0, 1 and 2, which are dominated by the K

_{0}^{*}

(800)

^{0}

and K

_{0}^{*}

(1430)

^{0}

, the K

^{*}

(892)

^{0}

and the K

_{2}^{*}

(1430)

^{0}

resonances, respectively. The longitudinal polarisation fraction for the

{B}_s^0\to {K}^{\ast }(892){}^{\circ}{\overline{K}}^{\ast }{(892)}^0

decay is measured as f

_{L}

= 0.208 ± 0.032 ± 0.046, where the first uncertainty is statistical and the second is systematic. The first measurement of the mixing-induced CP-violating phase,

{\phi}_s^{d\overline{d}}

, in

b\to d\overline{d}s

transitions is performed, yielding a value of

{\phi}_s^{d\overline{d}}=-0.10\pm 0.13\left(\mathrm{stat}\right)\pm 0.14

(syst) rad.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-048.html

CP violation
Flavour Changing Neutral Currents
B physics
Oscillation
Hadron-Hadron scattering (experiments)
p p: colliding beams
B/s0: hadronic decay
spin: 0
spin: 1
spin: 2

References(0)

Figures(19)

Loading ...

First measurement of the CPCPCP-violating phase ϕsdd‾\phi_s^{d\overline{d}}ϕsdd​ in Bs0→(K+π−)(K−π+)B_s^0\to(K^+\pi^-)(K^-\pi^+)Bs0​→(K+π−)(K−π+) decays

Citations per year

First measurement of the $CP$ -violating phase $\phi_s^{d\overline{d}}$ in $B_s^0\to(K^+\pi^-)(K^-\pi^+)$ decays