Measurement of the Charm-Mixing Parameter $y_{CP}$

A measurement of the charm-mixing parameter yCP using D0→K+K-, D0→π+π-, and D0→K-π+ decays is reported. The D0 mesons are required to originate from semimuonic decays of B- and B¯0 mesons. These decays are partially reconstructed in a data set of proton-proton collisions at center-of-mass energies of 7 and 8 TeV collected with the LHCb experiment and corresponding to an integrated luminosity of 3 fb-1. The yCP parameter is measured to be (0.57±0.13(stat)±0.09(syst))%, in agreement with, and as precise as, the current world-average value.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-038.html •
Submitted to Phys.Rev.Lett.

Elementary Particles and Fields
p p: scattering
p p: colliding beams
anti-B0: semileptonic decay
B-: semileptonic decay
D0: hadronic decay
D0 anti-D0: mixing
LHC-B
CERN LHC Coll
experimental results

References(27)

Figures(3)

[1]

Review of Particle Physics

M. Tanabashi
(
- Nagoya U. and
- KMI, Nagoya
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
Y. Sumino
(
- Tohoku U.
)

et al.

- Phys.Rev.D 98 (2018) 3, 030001
•
DOI:
- 10.1103/PhysRevD.98.030001

[2]

Averages of $b$ -hadron, $c$ -hadron, and $\tau$ -lepton properties as of summer 2016

HFLAV

Collaboration

•

Y. Amhis
(
- Orsay, LAL
)

et al.

- Eur.Phys.J.C 77 (2017) 12, 895
•
e-Print:
- 1612.07233
•
DOI:
- 10.1140/epjc/s10052-017-5058-4

[3]

Searching for Possible Large {CP} Violation Effects in Neutral Charm Meson Decays

Dong-sheng Du
(
- Princeton, Inst. Advanced Study
)

- Phys.Rev.D 34 (1986) 3428
•
DOI:
- 10.1103/PhysRevD.34.3428

[4]

Lessons from CLEO and FOCUS measurements of D0 - anti-D0 mixing parameters

Sven Bergmann
(
- Weizmann Inst.
)
,
Yuval Grossman
(
- SLAC
)
,
Zoltan Ligeti
(
- Fermilab
)
,
Yosef Nir
(
- Princeton, Inst. Advanced Study and
- Weizmann Inst.
)
,
Alexey A. Petrov
(
- Johns Hopkins U.
)

- Phys.Lett.B 486 (2000) 418-425
•
e-Print:
- hep-ph/0005181
•
DOI:
- 10.1016/S0370-2693(00)00772-3

[5]

Measurement of $D^0-\bar{D}^0$ Mixing and CP Violation in Two-Body $D^0$ Decays

BaBar

Collaboration

•

J.P. Lees
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 87 (2013) 1, 012004
•
e-Print:
- 1209.3896
•
DOI:
- 10.1103/PhysRevD.87.012004

[6]

Measurement of $D^0 – \bar {D^0}$ mixing and search for CP violation in $D^0 \to K^+ K^−, \pi^+ \pi^−$ decays with the full Belle data set

Belle

Collaboration

•

Marko Starič
(
- Stefan Inst., Ljubljana
)

et al.

- Phys.Lett.B 753 (2016) 412-418
•
e-Print:
- 1509.08266
•
DOI:
- 10.1016/j.physletb.2015.12.025

[7]

Measurement of mixing and CP violation parameters in two-body charm decays

LHCb

Collaboration

•

R. Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 04 (2012) 129
•
e-Print:
- 1112.4698
•
DOI:
- 10.1007/JHEP04(2012)129

[8]

The Role of CP violation in D0 anti-D0 mixing

- Phys.Lett.B 355 (1995) 555-560
•
e-Print:
- hep-ph/9504306
•
DOI:
- 10.1016/0370-2693(95)00787-L

[9]

S. Bianco
,
F.L. Fabbri
,
D. Benson
,
I. Bigi

- Riv.Nuovo Cim. 26 (2003) 1

[10]

New physics and CP violation in singly Cabibbo suppressed D decays

Yuval Grossman
(
- Technion
)
,
Alexander L. Kagan
(
- Cincinnati U.
)
,
Yosef Nir
(
- Weizmann Inst.
)

- Phys.Rev.D 75 (2007) 036008
•
e-Print:
- hep-ph/0609178
•
DOI:
- 10.1103/PhysRevD.75.036008

[11]

Charm mixing in the Standard Model and beyond

Alexey A Petrov
(
- Wayne State U.
)

- Int.J.Mod.Phys.A 21 (2006) 5686-5693
•
e-Print:
- hep-ph/0611361
•
DOI:
- 10.1142/S0217751X06034902

[12]

Implications of $D^0$ - $\bar{D}^0$ Mixing for New Physics

Eugene Golowich
(
- Massachusetts U., Amherst
)
,
JoAnne Hewett
(
- SLAC
)
,
Sandip Pakvasa
(
- Hawaii U.
)
,
Alexey A. Petrov
(
- Wayne State U.
)

- Phys.Rev.D 76 (2007) 095009
•
e-Print:
- 0705.3650
•
DOI:
- 10.1103/PhysRevD.76.095009

[13]

$D$ - $\bar{D}$ mixing and new physics: General considerations and constraints on the MSSM

M. Ciuchini
(
- Rome III U. and
- INFN, Rome3
)
,
E. Franco
(
- Rome U. and
- INFN, Rome
)
,
D. Guadagnoli
(
- Munich, Tech. U.
)
,
V. Lubicz
(
- Rome III U. and
- INFN, Rome3
)
,
M. Pierini
(
- Wisconsin U., Madison
)

et al.

- Phys.Lett.B 655 (2007) 162-166
•
e-Print:
- hep-ph/0703204
•
DOI:
- 10.1016/j.physletb.2007.08.055

[14]

Violation of CP Invariance, C asymmetry, and baryon asymmetry of the universe

A.D. Sakharov
(
- Lebedev Inst.
)

- Pisma Zh.Eksp.Teor.Fiz. 5 (1967) 32-35,
- JETP Lett. 5 (1967) 24-27,
- Sov.Phys.Usp. 34 (1991) 5, 392-393,
- Usp.Fiz.Nauk 161 (1991) 5, 61-64
•
DOI:
- 10.1070/PU1991v034n05ABEH002497

[14]

Violation of CP Invariance, C asymmetry, and baryon asymmetry of the universe

A.D. Sakharov
(
- Lebedev Inst.
)

- Pisma Zh.Eksp.Teor.Fiz. 5 (1967) 32-35,
- JETP Lett. 5 (1967) 24-27,
- Sov.Phys.Usp. 34 (1991) 5, 392-393,
- Usp.Fiz.Nauk 161 (1991) 5, 61-64
•
DOI:
- 10.1070/PU1991v034n05ABEH002497

[14]

Violation of CP Invariance, C asymmetry, and baryon asymmetry of the universe

A.D. Sakharov
(
- Lebedev Inst.
)

- Pisma Zh.Eksp.Teor.Fiz. 5 (1967) 32-35,
- JETP Lett. 5 (1967) 24-27,
- Sov.Phys.Usp. 34 (1991) 5, 392-393,
- Usp.Fiz.Nauk 161 (1991) 5, 61-64
•
DOI:
- 10.1070/PU1991v034n05ABEH002497

[14]

Violation of CP Invariance, C asymmetry, and baryon asymmetry of the universe

A.D. Sakharov
(
- Lebedev Inst.
)

- Pisma Zh.Eksp.Teor.Fiz. 5 (1967) 32-35,
- JETP Lett. 5 (1967) 24-27,
- Sov.Phys.Usp. 34 (1991) 5, 392-393,
- Usp.Fiz.Nauk 161 (1991) 5, 61-64
•
DOI:
- 10.1070/PU1991v034n05ABEH002497