Precision lifetime measurements of $\mathrm{b}$ hadrons reconstructed in final states with a $\mathrm{J}/\psi$ meson - INSPIRE

DataBETA

Precision lifetime measurements of $\mathrm{b}$ hadrons reconstructed in final states with a $\mathrm{J}/\psi$ meson

CMS

Collaboration

2017

20 pages

Report number:

CMS-PAS-BPH-13-008

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

reference search5 citations

Citations per year

Abstract:

We present measurements of the lifetimes of the

\mathrm{B^0}

,

\mathrm{B_{s}^0}

,

\Lambda_{\mathrm{b}}^{0}

, and

\mathrm{B}_\mathrm{c}^{+}

hadrons using the decay channels

\mathrm{B}^{0}\to \mathrm{J}/\psi \mathrm{K}^{*}(892)^{0}

,

\mathrm{B}^{0}\to \mathrm{J}/\psi \mathrm{K_{S}}

,

\mathrm{B_{s}^0} \to \mathrm{J}/\psi \pi^{+} \pi^{-}

,

\mathrm{B_{s}^0} \to \mathrm{J}/\psi \phi(1020)

,

\Lambda_{\mathrm{b}}^{0} \to \mathrm{J}/\psi \Lambda

, and

\mathrm{B}_\mathrm{c}^{+} \to \mathrm{J}/\psi \pi^{+}

. The data sample, corresponding to

19.7~\mathrm{fb}^{-1}

, was collected from proton-proton collisions at

\sqrt{s}=8~\mathrm{TeV}

using dedicated triggers to select oppositely charged muons in the

\mathrm{J}/\psi

mass region. The lifetimes times the speed of light are measured to be \begin{align*} & c\tau_{\mathrm{B}^0} = 453.0 \pm 1.6 \mbox{ (stat) } \pm 1.5 \mbox{ (syst)}~\mu\mbox{m}~(\mbox{in } \mathrm{J}/\psi \mathrm{K}^{*}(892)^{0})\\ & c\tau_{\mathrm{B}^0} = 457.8 \pm 2.7 \mbox{ (stat) } \pm 2.7 \mbox{ (syst)}~\mu\mbox{m}~(\mbox{in } \mathrm{J}/\psi \mathrm{K_{S}})\\ & c\tau_{\mathrm{B_{s}^0}} = 504.3 \pm 10.5 \mbox{ (stat) } \pm 3.7 \mbox{ (syst)}~\mu\mbox{m}~(\mbox{in } \mathrm{J}/\psi \pi^{+} \pi^{-}) \\ & c\tau_{\mathrm{B_{s}^0}} = 443.9 \pm 2.0 \mbox{ (stat) } \pm 1.2 \mbox{ (syst)}~\mu\mbox{m}~(\mbox{in } \mathrm{J}/\psi \phi(1020))\\ & c\tau_{\Lambda_{\mathrm{b}}^{0}} = 443.1 \pm 8.2 \mbox{ (stat) } \pm 2.7 \mbox{ (syst)}~\mu\mbox{m}\\ & c\tau_{\mathrm{B}_\mathrm{c}^{+}} = 162.3 \pm 8.2 \mbox{ (stat)} \pm 4.7 \mbox{ (syst)} \pm 0.1 (\tau_{\mathrm{B}^{+}})~\mu\mbox{m} \end{align*} where the first uncertainty is statistical and the other is systematic. All results are in agreement with the current world average values.

Note:

Preliminary results

Data
p p: scattering
p p: colliding beams
B0: lifetime: measured
B/s0: lifetime: measured
Lambda/b0: lifetime: measured
B+: lifetime: measured
B0: hadronic decay
B/s0: hadronic decay
Lambda/b0: hadronic decay

References(26)

Figures(23)

[1]

Prompt and Non-Prompt $J/\psi$ Production in $pp$ Collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- Eur.Phys.J.C 71 (2011) 1575
•
e-Print:
- 1011.4193
•
DOI:
- 10.1140/epjc/s10052-011-1575-8

[2]

The CMS Experiment at the CERN LHC

CMS

Collaboration

•

S. Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 3 (2008) S08004
•
DOI:
- 10.1088/1748-0221/3/08/S08004

[3]

Effective Lifetimes of $B_s$ Decays and their Constraints on the $B_s^0$ - $\bar B_s^0$ Mixing Parameters

- Eur.Phys.J.C 71 (2011) 1789
•
e-Print:
- 1109.5115
•
DOI:
- 10.1140/epjc/s10052-011-1789-9

[4]

Review of Particle Physics

C. Patrignani
(
- Bologna U. and
- INFN, Bologna
)
,
K. Agashe
(
- Maryland U.
)
,
G. Aielli
(
- U. Rome 2, Tor Vergata (main)
)
,
C. Amsler
(
- U. Bern, AEC and
- Stefan Meyer Inst. Subatomare Phys.
)
,
M. Antonelli
(
- Frascati
)

et al.

- Chin.Phys.C 40 (2016) 10, 100001
•
DOI:
- 10.1088/1674-1137/40/10/100001

[5]

Analysis of the resonant components in $B_s \to J/\psi\pi^+\pi^-$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.D 86 (2012) 052006
•
e-Print:
- 1204.5643
•
DOI:
- 10.1103/PhysRevD.86.052006

[5]

Analysis of the resonant components in $B^¯+0 \to J/\psi\pi^+\pi^-$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.D 87 (2013) 5, 052001
•
e-Print:
- 1301.5347
•
DOI:
- 10.1103/PhysRevD.87.052001

[6]

Measurement of resonant and CP components in $\bar{B}_s^0\to J/\psi\pi^+\pi^-$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.D 89 (2014) 9, 092006
•
e-Print:
- 1402.6248
•
DOI:
- 10.1103/PhysRevD.89.092006

[7]

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

[8]

Measurement of the $B_c^+$ meson lifetime using $B_c^+ \to J\!/\!\psi \mu^+ \nu_{\mu} X$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Eur.Phys.J.C 74 (2014) 5, 2839
•
e-Print:
- 1401.6932
•
DOI:
- 10.1140/epjc/s10052-014-2839-x

[9]

Measurement of the lifetime of the $B_c^+$ meson using the $B_c^+\rightarrow J/\psi\pi^+$ decay mode

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 742 (2015) 29-37
•
e-Print:
- 1411.6899
•
DOI:
- 10.1016/j.physletb.2015.01.010

[10]

Measurement of the B(c)+ meson lifetime using B(c)+ ---> J/psi e+ nu(e)

CDF

Collaboration

•

A. Abulencia
(
- Illinois U., Urbana
)

et al.

- Phys.Rev.Lett. 97 (2006) 012002
•
e-Print:
- hep-ex/0603027
•
DOI:
- 10.1103/PhysRevLett.97.012002

[11]

Measurement of the $B_c^{-}$ Meson Lifetime in the Decay $B_{c}^{-} \rightarrow J/\psi~\pi^{-}$

CDF

Collaboration

•

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

et al.

- Phys.Rev.D 87 (2013) 1, 011101
•
e-Print:
- 1210.2366
•
DOI:
- 10.1103/PhysRevD.87.011101

[12]

Measurement of the lifetime of the $B_c^\pm$ meson in the semileptonic decay channel

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 102 (2009) 092001
•
e-Print:
- 0805.2614
•
DOI:
- 10.1103/PhysRevLett.102.092001

[13]

Description and performance of track and primary-vertex reconstruction with the CMS tracker

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 9 (2014) 10, P10009
•
e-Print:
- 1405.6569
•
DOI:
- 10.1088/1748-0221/9/10/P10009

[14]

PYTHIA 6.4 Physics and Manual

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- Fermilab
)

- JHEP 05 (2006) 026
•
e-Print:
- hep-ph/0603175
•
DOI:
- 10.1088/1126-6708/2006/05/026

[15]

BCVEGPY: An Event generator for hadronic production of the $B_c$ meson

Chao-Hsi Chang
(
)
,
Chafik Driouichi
(
- Lund U.
)
,
Paula Eerola
(
- Lund U.
)
,
Xing Gang Wu
(
- Beijing, Inst. Theor. Phys.
)

- Comput.Phys.Commun. 159 (2004) 192-224
•
e-Print:
- hep-ph/0309120
•
DOI:
- 10.1016/j.cpc.2004.02.005

[16]

BCVEGPY2.0: A Upgrade version of the generator BCVEGPY with an addendum about hadroproduction of the P-wave B(c) states

- Comput.Phys.Commun. 174 (2006) 241-251
•
e-Print:
- hep-ph/0504017
•
DOI:
- 10.1016/j.cpc.2005.09.008

[17]

The EvtGen particle decay simulation package

D.J. Lange
(
- LLNL, Livermore
)

- Nucl.Instrum.Meth.A 462 (2001) 152-155
•
DOI:
- 10.1016/S0168-9002(01)00089-4

[18]

PHOTOS Monte Carlo: A Precision tool for QED corrections in $Z$ and $W$ decays

Piotr Golonka
(
- CERN and
- Cracow, INP
)
,
Zbigniew Was
(
- CERN and
- Cracow, INP
)

- Eur.Phys.J.C 45 (2006) 97-107
•
e-Print:
- hep-ph/0506026
•
DOI:
- 10.1140/epjc/s2005-02396-4

[19]

GEANT4 - A Simulation Toolkit

GEANT4

Collaboration

•

S. Agostinelli
(
- Genoa U.
)

et al.

- Nucl.Instrum.Meth.A 506 (2003) 250-303
•
DOI:
- 10.1016/S0168-9002(03)01368-8

[20]

Performance of CMS Muon Reconstruction in $pp$ Collision Events at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 7 (2012) P10002
•
e-Print:
- 1206.4071
•
DOI:
- 10.1088/1748-0221/7/10/P10002

[21]

CMS Tracking Performance Results from Early LHC Operation

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- Eur.Phys.J.C 70 (2010) 1165-1192
•
e-Print:
- 1007.1988
•
DOI:
- 10.1140/epjc/s10052-010-1491-3

[22]

First observation of the decay $B_{c}^{+}\to J/\psi K^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 09 (2013) 075
•
e-Print:
- 1306.6723
•
DOI:
- 10.1007/JHEP09(2013)075

[23]

A study of the radiative CASCADE transitions between the Upsilon-Prime and Upsilon resonances

Tomasz Skwarnicki
(
- Cracow, INP and
- DESY
)

[24]

A Study of the Reactions $\psi^\prime \to \gamma \gamma \psi$

M. Oreglia
(
- SLAC
)

- SLAC Stanford - SLAC-236 (80,REC.APR. 81) 226p

1-25 of 26
1
2
25 / page