Measurement of the $\Lambda_b^0$ lifetime in the exclusive decay $\Lambda_b^0 \to J/\psi \Lambda^0$ in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV - INSPIRE

DataBETA

Measurement of the $\Lambda_b^0$ lifetime in the exclusive decay $\Lambda_b^0 \to J/\psi \Lambda^0$ in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

Apr, 2012

7 pages

Published in:

Phys.Rev.D 85 (2012) 112003

e-Print:

1204.2340 [hep-ex]

DOI:

10.1103/PhysRevD.85.112003

PDG:

{{\mathit \Lambda}_{{{b}}}^{0}}

Report number:

FERMILAB-PUB-12-097-E

Experiments:

FNAL-E-0823

View in:

reference search50 citations

Citations per year

Abstract: (arXiv)

We measure the Lambda_b^0 lifetime in the fully reconstructed decay Lambda_b^0 -> J/psi Lambda^0 using 10.4 fb^-1 of ppbar collisions collected with the D0 detector at sqrt(s)=1.96 TeV. The lifetime of the topologically similar decay channel B^0 -> J/psi K^0_S is also measured. We obtain tau(Lambda_b^0) = 1.303 +- 0.075 (stat.) +- 0.035 (syst.) ps and tau(B^0) = 1.508 +- 0.025 (stat.) +- 0.043 (syst.) ps. Using these measurements, we determine the lifetime ratio of tau(Lambda_b^0)/tau(B^0) = 0.864 +- 0.052 (stat.) +- 0.033 (syst.).

Note:

Submitted to Phys. Rev. D Rapid Communications, 7 pages, 4 figures

14.20.Mr
13.30.Eg
13.25.Hw
14.40.Nd
lifetime: ratio
J/psi(3100)
anti-p p: interaction
Lambda/b0: hadronic decay
Lambda/b0: lifetime: measured
B0: hadronic decay

References(20)

Figures(4)

[1]

Lifetimes of charm and beauty hadrons

G. Bellini
(
- Milan U. and
- INFN, Milan
)
,
Ikaros I.Y. Bigi
(
- Notre Dame U.
)
,
P.J. Dornan
(
- Imperial Coll., London
)

- Phys.Rept. 289 (1997) 1-155
•
DOI:
- 10.1016/S0370-1573(97)00005-7

[2]

Mixing and lifetimes of $b-$ hadrons

Alexander J. Lenz
(
- Regensburg U.
)

- AIP Conf.Proc. 1026 (2008) 1, 36-47
•
e-Print:
- 0802.0977
•
DOI:
- 10.1063/1.2965074

[3]

Measurement of $b$ Hadron Lifetimes in Exclusive Decays Containing a $J/\psi$ in $p^-$ pbar Collisions at $\sqrt{s}=1.96$ TeV

CDF

Collaboration

•

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

et al.

- Phys.Rev.Lett. 106 (2011) 121804
•
e-Print:
- 1012.3138
•
DOI:
- 10.1103/PhysRevLett.106.121804

[4]

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

- J.Phys.G 37 (2010) 075021
•
DOI:
- 10.1088/0954-3899/37/7A/075021

[5]

B-meson mixing and lifetimes

C. Tarantino
(
- Rome III U. and
- INFN, Rome3
)

- Nucl.Phys.B Proc.Suppl. 156 (2006) 33-37
•
e-Print:
- hep-ph/0508309
•
DOI:
- 10.1016/j.nuclphysbps.2006.02.119

[6]

Measurement of the $\Lambda_b$ Lifetime in the Exclusive Decay $\Lambda_b \to J/\psi \Lambda$

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 99 (2007) 142001
•
e-Print:
- 0704.3909
•
DOI:
- 10.1103/PhysRevLett.99.142001

[7]

Measurement of the $\Lambda_b^0$ lifetime using semileptonic decays

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 99 (2007) 182001
•
e-Print:
- 0706.2358
•
DOI:
- 10.1103/PhysRevLett.99.182001

[8]

Measurement of the $\Lambda_b$ Lifetime in $\Lambda_b \to \Lambda_c^+ \pi^-$ Decays in $p\bar{p}$ Collisions at $\sqrt{s} = 1.96$ TeV

CDF

Collaboration

•

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

et al.

- Phys.Rev.Lett. 104 (2010) 102002
•
e-Print:
- 0912.3566
•
DOI:
- 10.1103/PhysRevLett.104.102002

[9]

Measurement of the lifetime of $b$ - baryons

DELPHI

Collaboration

•

P. Abreu

et al.

- Eur.Phys.J.C 10 (1999) 185-199
•
DOI:
- 10.1007/s100520050582

[10]

Measurements of the $B_s^0$ and $\Lambda_b^0$ lifetimes

OPAL

Collaboration

•

K. Ackerstaff

et al.

- Phys.Lett.B 426 (1998) 161-179
•
e-Print:
- hep-ex/9802002
•
DOI:
- 10.1016/S0370-2693(98)00289-5

[11]

Measurement of the $B$ baryon lifetime and branching fractions in $Z$ decays

ALEPH

Collaboration

•

R. Barate
(
- Annecy, LAPP
)

et al.

- Eur.Phys.J.C 2 (1998) 197-211
•
DOI:
- 10.1007/s100520050133

[12]

Measurement of $\Lambda_b^0$ lifetime using $\Lambda_b^0 \to \Lambda_c^+ \ell^- \bar{\nu}$

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 77 (1996) 1439-1443
•
DOI:
- 10.1103/PhysRevLett.77.1439

[13]

The Upgraded D0 Detector

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Nucl.Instrum.Meth.A 565 (2006) 463-537
•
e-Print:
- physics/0507191
•
DOI:
- 10.1016/j.nima.2006.05.248

[14]

Design and Implementation of the New D0 Level-1 Calorimeter Trigger

M. Abolins
(
- Michigan State U.
)
,
M. Adams
(
- Illinois U., Chicago
)
,
T. Adams
(
- Florida State U.
)
,
Ernest Aguilo
(
- Alberta U. and
- York U., Canada
)
,
J. Anderson
(
- Fermilab
)

et al.

- Nucl.Instrum.Meth.A 584 (2008) 75-97
•
e-Print:
- 0709.3750
•
DOI:
- 10.1016/j.nima.2007.10.014

[15]

The Layer 0 Inner Silicon Detector of the D0 Experiment

D0

Collaboration

•

R. Angstadt
(
- Fermilab
)

et al.

- Nucl.Instrum.Meth.A 622 (2010) 298-310
•
e-Print:
- 0911.2522
•
DOI:
- 10.1016/j.nima.2010.04.148

[16]

The D0 Silicon Microstrip Tracker

D0

Collaboration

•

S.N. Ahmed
(
- Nijmegen U.
)

et al.

- Nucl.Instrum.Meth.A 634 (2011) 8-46
•
e-Print:
- 1005.0801
•
DOI:
- 10.1016/j.nima.2010.11.121

[17]

High-energy physics event generation with PYTHIA 6.1

et al.

- Comput.Phys.Commun. 135 (2001) 238-259
•
e-Print:
- hep-ph/0010017
•
DOI:
- 10.1016/S0010-4655(00)00236-8

[18]

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

[19]

GEANT Detector Description and Simulation Tool

et al.

DOI:
- 10.17181/CERN.MUHF.DMJ1

[20]

Direct observation of the strange $b$ baryon $\Xi_b^-$

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 99 (2007) 052001
•
e-Print:
- 0706.1690
•
DOI:
- 10.1103/PhysRevLett.99.052001