Evidence for $CP$ violation and measurement of $CP$-violating parameters in B$^0_\mathrm{s}$ $\to$ J/$\psi\,\phi$(1020) decays in pp collisions at $\sqrt{s} =$ 13 TeV - INSPIRE

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Evidence for $CP$ violation and measurement of $CP$ -violating parameters in B $^0_\mathrm{s}$ $\to$ J/ $\psi\,\phi$ (1020) decays in pp collisions at $\sqrt{s} =$ 13 TeV

CMS

Collaboration

Dec 27, 2024

47 pages

e-Print:

2412.19952 [hep-ex]

Report number:

CMS-BPH-23-004,
CERN-EP-2024-300

Experiments:

CERN-LHC-CMS

View in:

reference search2 citations

Citations per year

Abstract: (arXiv)

A pioneering machine-learning-based flavor-tagging algorithm combining same-side and opposite-side tagging is used to obtain the equivalent of 27

\,

000 tagged B

^0_\mathrm{s}

\to

J/

\psi\, \phi

(1020) decays from pp collisions at

\sqrt{s} =

13 TeV, collected by the CMS experiment and corresponding to an integrated luminosity of 96.5 fb

^{-1}

. A time- and flavor-dependent angular analysis of the

\mu^+\mu^-

K

^+

K

^-

final state is used to measure parameters of the

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

-

\overline{\mathrm{B}}^0_\mathrm{s}

system. The weak phase is measured to be

\phi_\mathrm{s}

=

-

73

\pm

23 (stat)

\pm

7 (syst) mrad, which, combined with a

\sqrt{s}

= 8 TeV CMS result, gives

\phi_\mathrm{s}

=

-

74

\pm

23 mrad. This value differs from zero by 3.2 standard deviations, providing evidence for

CP

violation in B

^0_\mathrm{s}

\to

J/

\psi\,\phi

(1020) decays. All measured physics parameters are found to agree with standard model predictions where available.

Note:

Submitted to Physical Review Letters. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-23-004 (CMS Public Pages)

References(63)

Figures(56)

[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

[2]

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

[3]

In pursuit of new physics with $B_d^0\to J/\psi K^0$ and $B_s^0\to J/\psi\phi$ decays at the high-precision Frontier

Marten Z. Barel
(
- Nikhef, Amsterdam
)
,
Kristof De Bruyn
(
- Nikhef, Amsterdam and
- Groningen U.
)
,
Robert Fleischer
(
- Nikhef, Amsterdam and
- Vrije U., Amsterdam
)
,
Eleftheria Malami
(
- Nikhef, Amsterdam
)

- J.Phys.G 48 (2021) 6, 065002
•
e-Print:
- 2010.14423
•
DOI:
- 10.1088/1361-6471/abf2a2

[4]

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

[5]

New UTfit Analysis of the Unitarity Triangle in the Cabibbo-Kobayashi-Maskawa scheme

UTfit

Collaboration

•

Marcella Bona
(
- Queen Mary, U. of London
)

et al.

- Rend.Lincei Sci.Fis.Nat. 34 (2023) 37-57
•
e-Print:
- 2212.03894
•
DOI:
- 10.1007/s12210-023-01137-5

[6]

Observation of $B^0_s - \bar{B}^0_s$ Oscillations

CDF

Collaboration

•

A. Abulencia
(
- Illinois U., Urbana
)

et al.

- Phys.Rev.Lett. 97 (2006) 242003
•
e-Print:
- hep-ex/0609040
•
DOI:
- 10.1103/PhysRevLett.97.242003

[7]

New Physics in B0(s) ---> J/psi phi: A General Analysis

Cheng-Wei Chiang
(
- Taiwan, Natl. Central U. and
- Taiwan, Inst. Phys.
)
,
Alakabha Datta
(
- Mississippi U.
)
,
Murugeswaran Duraisamy
(
- Mississippi U.
)
,
David London
(
- Montreal U.
)
,
Makiko Nagashima
(
- Montreal U.
)

et al.

- JHEP 04 (2010) 031
•
e-Print:
- 0910.2929
•
DOI:
- 10.1007/JHEP04(2010)031

[8]

CP violation in the $B_s^0$ system

- Rev.Mod.Phys. 88 (2016) 4, 045002,
- Rev.Mod.Phys. 91 (2019) 4, 049901 (addendum)
•
e-Print:
- 1511.09466
•
DOI:
- 10.1103/RevModPhys.88.045002

[8]

CP violation in the $B_s^0$ system

- Rev.Mod.Phys. 88 (2016) 4, 045002,
- Rev.Mod.Phys. 91 (2019) 4, 049901 (addendum)
•
e-Print:
- 1511.09466
•
DOI:
- 10.1103/RevModPhys.88.045002

[9]

Measurement of $B^0_{s}$ mixing parameters from the flavor-tagged decay $B^0_{s} \to J/\psi \phi$

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 101 (2008) 241801
•
e-Print:
- 0802.2255
•
DOI:
- 10.1103/PhysRevLett.101.241801

[10]

Measurement of the CP-violating phase $\phi_s^{J/\psi \phi}$ using the flavor-tagged decay $B_s^0 \rightarrow J/\psi \phi$ in 8 fb $^{-1}$ of $p \bar p$ collisions

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.D 85 (2012) 032006
•
e-Print:
- 1109.3166
•
DOI:
- 10.1103/PhysRevD.85.032006

[11]

First Flavor-Tagged Determination of Bounds on Mixing-Induced CP Violation in $B^0_{s} \to J/\psi \phi$ Decays

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.Lett. 100 (2008) 161802
•
e-Print:
- 0712.2397
•
DOI:
- 10.1103/PhysRevLett.100.161802

[12]

Measurement of the CP-Violating Phase $\beta_s^{J/\psi\phi}$ in $B^0_s \to J/\psi \phi$ Decays with the CDF II Detector

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.D 85 (2012) 072002
•
e-Print:
- 1112.1726
•
DOI:
- 10.1103/PhysRevD.85.072002

[13]

Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys. and
- Helsinki U.
)

et al.

- Phys.Rev.Lett. 109 (2012) 171802
•
e-Print:
- 1208.2967
•
DOI:
- 10.1103/PhysRevLett.109.171802

[14]

Measurement of the CP-violating weak phase $\phi_s$ and the decay width difference $\Delta \Gamma_s$ using the B $_s^0 \to J/\psi\phi$ (1020) decay channel in pp collisions at $\sqrt{s}=$ 8 TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 757 (2016) 97-120
•
e-Print:
- 1507.07527
•
DOI:
- 10.1016/j.physletb.2016.03.046

[15]

Measurement of the CP-violating phase ϕs in the $B_{s}^{0} \to J / ψ ϕ (1020) \to μ^{+} μ^{-} K^{+} K^{-}$ channel in proton-proton collisions at $\sqrt{s} = 13 TeV$

CMS

Collaboration

•

Albert M Sirunyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 816 (2021) 136188,
- Phys.Lett.B 816 (2021) 136188
•
e-Print:
- 2007.02434
•
DOI:
- 10.1016/j.physletb.2021.136188

[16]

Measurement of the CP-violating phase $\phi_s$ in $\overline{B}^0_s \to J/\psi\pi^+\pi^-$ decays

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 713 (2012) 378-386
•
e-Print:
- 1204.5675
•
DOI:
- 10.1016/j.physletb.2012.06.032

[17]

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

[18]

Measurement of the CP-violating phase $\phi_s$ in $\overline{B}^0_s\rightarrow J/\psi \pi^+\pi^-$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 736 (2014) 186-195
•
e-Print:
- 1405.4140
•
DOI:
- 10.1016/j.physletb.2014.06.079

[19]

Precision measurement of $CP$ violation in $B_s^0 \to J/\psi K^+K^-$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 114 (2015) 4, 041801
•
e-Print:
- 1411.3104
•
DOI:
- 10.1103/PhysRevLett.114.041801

[20]

Improved Measurement of $C P$ Violation Parameters in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ Decays in the Vicinity of the $ϕ (1020)$ Resonance

LHCb

Collaboration

•

Ia. Bezshyiko
(
- Zurich U.
)

et al.

- Phys.Rev.Lett. 132 (2024) 5, 051802
•
e-Print:
- 2308.01468
•
DOI:
- 10.1103/PhysRevLett.132.051802

[21]

Measurement of the $CP$ -violating phase $\phi_s$ in $\bar{B}^{0}_{s}\to D_{s}^{+}D_{s}^{-}$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 113 (2014) 21, 211801
•
e-Print:
- 1409.4619
•
DOI:
- 10.1103/PhysRevLett.113.211801

[22]

First study of the CP -violating phase and decay-width difference in $B_s^0\to\psi(2S)\phi$ decays

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- Phys.Lett.B 762 (2016) 253-262
•
e-Print:
- 1608.04855
•
DOI:
- 10.1016/j.physletb.2016.09.028

[23]

Time-dependent angular analysis of the decay $B_{s}^{0} \to J/{\psi\phi}$ and extraction of $\Delta\Gamma_{s}$ and the CP-violating weak phase $\phi_s$ by ATLAS

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- JHEP 12 (2012) 072
•
e-Print:
- 1208.0572
•
DOI:
- 10.1007/JHEP12(2012)072

[24]

Flavor tagged time-dependent angular analysis of the $B_s \rightarrow J/\psi \phi$ decay and extraction of $\Delta\Gamma$ s and the weak phase $\phi_s$ in ATLAS

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Phys.Rev.D 90 (2014) 5, 052007
•
e-Print:
- 1407.1796
•
DOI:
- 10.1103/PhysRevD.90.052007

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