Determination of $\gamma$ and −2$\beta_s$ from charmless two-body decays of beauty mesons - INSPIRE

DataBETA

Determination of $\gamma$ and −2 $\beta_s$ from charmless two-body decays of beauty mesons

LHCb

Collaboration

Aug 19, 2014

11 pages

Published in:

Phys.Lett.B 741 (2015) 1-11

Published: Feb 4, 2015

e-Print:

1408.4368 [hep-ex]

DOI:

10.1016/j.physletb.2014.12.015

PDG:

\gamma

Report number:

CERN-PH-EP-2014-207,
LHCB-PAPER-2014-045

Experiments:

CERN-LHC-LHCb

View in:

reference search48 citations

Citations per year

Abstract: (Elsevier)

Using the latest LHCb measurements of time-dependent CP violation in the Bs0→K+K− decay, a U-spin relation between the decay amplitudes of Bs0→K+K− and B0→π+π− decay processes allows constraints to be placed on the angle γ of the unitarity triangle and on the Bs0 mixing phase −2βs . Results from an extended approach, which uses additional inputs on B0→π0π0 and B+→π+π0 decays from other experiments and exploits isospin symmetry, are also presented. The dependence of the results on the maximum allowed amount of U-spin breaking is studied. At 68% probability, the value γ=(63.5−6.7+7.2)° modulo 180° is determined. In an alternative analysis, the value −2βs=−0.12−0.16+0.14 rad is found. In both measurements, the uncertainties due to U-spin breaking effects up to 50% are included.

Note:

updated to v2 with minor changes after journal review

CP: violation: time dependence
isospin: symmetry
CKM matrix: unitarity
LHC-B
B0 anti-B0: mixing
B/s0 anti-B/s0: mixing
p p: scattering
bottom meson: hadronic decay
final state: (0charm)
decay: amplitude analysis

References(38)

Figures(11)

[1]

Unitary Symmetry and Leptonic Decays

Nicola Cabibbo
(
- CERN
)

- Phys.Rev.Lett. 10 (1963) 531-533,
- Also in *Bologna 1984, Proceedings, Fifty years of weak-interaction physics* 648-649
•
DOI:
- 10.1103/PhysRevLett.10.531

[1]

CP Violation in the Renormalizable Theory of Weak Interaction

Makoto Kobayashi
(
- Kyoto U.
)
,
Toshihide Maskawa
(
- Kyoto U.
)

- Prog.Theor.Phys. 49 (1973) 652-657,
- Also in *Lichtenberg, D. B. (Ed.), Rosen, S. P. (Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 218-223.
•
DOI:
- 10.1143/PTP.49.652

[2]

The ultimate theoretical error on $\gamma$ from $B \to DK$ decays

Joachim Brod
(
- Cincinnati U.
)
,
Jure Zupan
(
- Cincinnati U.
)

- JHEP 01 (2014) 051
•
e-Print:
- 1308.5663
•
DOI:
- 10.1007/JHEP01(2014)051

[3]

Observation of direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with $B^\pm\to D^{()}K^{()\pm}$ decays

BaBar

Collaboration

•

J.P. Lees
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 87 (2013) 5, 052015
•
e-Print:
- 1301.1029
•
DOI:
- 10.1103/PhysRevD.87.052015

[4]

Study of direct CP in charmed B decays and measurement of the CKM angle gamma at Belle

Belle

Collaboration

•

K. Trabelsi
(
- KEK, Tsukuba
)

for the collaboration.

e-Print:
- 1301.2033

[5]

Measurement of the CKM angle $\gamma$ from a combination of $B^{\pm} \to Dh^{\pm}$ analyses

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 726 (2013) 151-163
•
e-Print:
- 1305.2050
•
DOI:
- 10.1016/j.physletb.2013.08.020

[6]

Improved constraints on $\gamma$ from $B^\pm\to DK^\pm$ decays including first results on 2012 data

LHCb

Collaboration

[7]

The Unitarity Triangle Fit in the Standard Model and Hadronic Parameters from Lattice QCD: A Reappraisal after the Measurements of Delta m(s) and BR(B ---> tau nu(tau))

UTfit

Collaboration

•

M. Bona
(
- Annecy, LAPP
)

et al.

- JHEP 10 (2006) 081
•
e-Print:
- hep-ph/0606167
•
DOI:
- 10.1088/1126-6708/2006/10/081

[8]

Predictions of selected flavour observables within the Standard Model

J. Charles
(
- Marseille, CPT
)
,
O. Deschamps
(
- Clermont-Ferrand U.
)
,
S. Descotes-Genon
(
- Orsay, LPT
)
,
R. Itoh
(
- KEK, Tsukuba
)
,
H. Lacker
(
- Humboldt U., Berlin
)

et al.

- Phys.Rev.D 84 (2011) 033005
•
e-Print:
- 1106.4041
•
DOI:
- 10.1103/PhysRevD.84.033005

[9]

New strategies to extract Beta and gamma from B(d) ---> pi+ pi- and B(S) ---> K+ K-

Robert Fleischer
(
- CERN
)

- Phys.Lett.B 459 (1999) 306-320
•
e-Print:
- hep-ph/9903456
•
DOI:
- 10.1016/S0370-2693(99)00640-1

[10]

$B_{s,d} \to \pi \pi, \pi K, KK$ : Status and Prospects

Robert Fleischer
(
- CERN
)

- Eur.Phys.J.C 52 (2007) 267-281
•
e-Print:
- 0705.1121
•
DOI:
- 10.1140/epjc/s10052-007-0391-7

[11]

In Pursuit of New Physics With $B^0_s \to K^+K^-$

- Eur.Phys.J.C 71 (2011) 1532
•
e-Print:
- 1011.1096
•
DOI:
- 10.1140/epjc/s10052-010-1532-y

[12]

Testing the Standard Model and Searching for New Physics with $B_d \to \pi \pi$ and $B_s \to K K$ Decays

- JHEP 10 (2012) 029
•
e-Print:
- 1205.4948
•
DOI:
- 10.1007/JHEP10(2012)029

[13]

Isospin analysis of CP asymmetries in B decays

Michael Gronau
(
- Technion and
- DESY
)
,
David London
(
- Montreal U.
)

- Phys.Rev.Lett. 65 (1990) 3381-3384
•
DOI:
- 10.1103/PhysRevLett.65.3381

[14]

Determination of the sign of the decay width difference in the $B_s$ system

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 108 (2012) 241801
•
e-Print:
- 1202.4717
•
DOI:
- 10.1103/PhysRevLett.108.241801

[15]

Measurement of CP violation and the $B^0_s$ meson decay width difference with $B^0_s$ → $J/ψK^+K^-$ and $B^0_s$ → $J/ψπ^+π^-$ decays

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.D 87 (2013) 11, 112010
•
e-Print:
- 1304.2600
•
DOI:
- 10.1103/PhysRevD.87.112010

[16]

Averages of B-Hadron, C-Hadron, and $\tau$ -Lepton Properties as of early 2012

HFLAV

Collaboration

•

Y. Amhis
(
- LPHE, Lausanne
)

et al.

e-Print:
- 1207.1158

[17]

Measurement of the flavour-specific CP-violating asymmetry $a_{sl}^s$ in $B_s^0$ decays

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 728 (2014) 607-615
•
e-Print:
- 1308.1048
•
DOI:
- 10.1016/j.physletb.2013.12.030

[18]

Branching Ratio Measurements of $B_s$ Decays

Kristof De Bruyn
(
- NIKHEF, Amsterdam
)
,
Robert Fleischer
(
- NIKHEF, Amsterdam and
- Vrije U., Amsterdam
)
,
Robert Knegjens
(
- NIKHEF, Amsterdam
)
,
Patrick Koppenburg
(
- NIKHEF, Amsterdam
)
,
Marcel Merk
(
- NIKHEF, Amsterdam and
- Vrije U., Amsterdam
)

et al.

- Phys.Rev.D 86 (2012) 014027
•
e-Print:
- 1204.1735
•
DOI:
- 10.1103/PhysRevD.86.014027

[19]

Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body $B$ -Meson Decays to Pions and Kaons

BaBar

Collaboration

•

J.P. Lees
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 87 (2013) 5, 052009
•
e-Print:
- 1206.3525
•
DOI:
- 10.1103/PhysRevD.87.052009

[20]

Measurement of the CP violation parameters in $B^0 \to \pi^+ \pi^-$ decays

Belle

Collaboration

•

I. Adachi
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 88 (2013) 9, 092003
•
e-Print:
- 1302.0551
•
DOI:
- 10.1103/PhysRevD.88.092003

[21]

Study of $B^0 \to \pi^0 \pi^0$ , $B^\pm \to \pi^\pm \pi^0$ , and $B^\pm \to K^\pm \pi^0$ Decays, and Isospin Analysis of $B \to \pi \pi$ Decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 76 (2007) 091102
•
e-Print:
- 0707.2798
•
DOI:
- 10.1103/PhysRevD.76.091102

[22]

Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays

Belle

Collaboration

•

Y.-T. Duh
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.D 87 (2013) 3, 031103
•
e-Print:
- 1210.1348
•
DOI:
- 10.1103/PhysRevD.87.031103

[23]

Observation of $B^0 \to \pi^0 \pi^0$

Belle

Collaboration

•

Y. Chao
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.Lett. 94 (2005) 181803
•
e-Print:
- hep-ex/0408101
•
DOI:
- 10.1103/PhysRevLett.94.181803

[24]

First measurement of time-dependent $C\!P$ violation in $B^0_s \to K^+K^-$ decays

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 10 (2013) 183
•
e-Print:
- 1308.1428
•
DOI:
- 10.1007/JHEP10(2013)183

1-25 of 38
1
2
25 / page