Search for lepton and baryon number violating tau- decays into anti-Lambda pi- and Lambda pi- - INSPIRE

DataBETA

Search for lepton and baryon number violating tau- decays into anti-Lambda pi- and Lambda pi-

Belle

Collaboration

•

Y. Miyazaki
(
- Nagoya U.
)

Aug, 2005

11 pages

Published in:

Phys.Lett.B 632 (2006) 51-57

e-Print:

hep-ex/0508044 [hep-ex]

DOI:

10.1016/j.physletb.2005.10.024

PDG:

{{\mathit \tau}^{-}}

\rightarrow

{{\mathit \Lambda}}{{\mathit \pi}^{-}}

Report number:

BELLE-PRERPINT-2005-31,
KEK-PREPRINT-2005-58

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search39 citations

Citations per year

Abstract: (Elsevier)

We have searched for τ lepton decays, τ−→Λ¯π− and τ−→Λπ− , that simultaneously violate the conservation of the lepton ( L ) and baryon ( B ) number using a data sample of 154 fb−1 collected with the Belle detector at the KEKB e+e− asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(τ−→Λ¯π−)<1.4×10−7 and B(τ−→Λπ−)<0.72×10−7 at the 90% confidence level. This is the first search ever performed for these modes.

Note:

11 pages, 12 figures

11.30.Fs
13.35.Dx
14.60.Fg
electron positron: colliding beams
electron positron: annihilation
tau: pair production
tau-: hadronic decay
lepton number: violation
baryon number: violation
tau-: branching ratio

References(25)

Figures(0)

Baryon and lepton number (non)conservation in supersymmetric theories

S. Lola
(
- Oxford U.
)
,
Graham G. Ross
(
- Oxford U.
)

- Phys.Lett.B 314 (1993) 336-344
•
DOI:
- 10.1016/0370-2693(93)91246-J

Baryon and Lepton Number Violation in Superstring Models

George Lazarides
(
- Thessaloniki U.
)
,
C. Panagiotakopoulos
(
- Rockefeller U.
)
,
Q. Shafi
(
- Delaware U., Bartol Inst.
)

- Nucl.Phys.B 278 (1986) 657-666
•
DOI:
- 10.1016/0550-3213(86)90056-8

Review of particle physics. Particle Data Group

S. Eidelman
(
- Novosibirsk, IYF
)
,
K.G. Hayes
(
- Hillsdale Coll.
)
,
K.A. Olive
(
- Minnesota U.
)
,
M. Aguilar-Benitez
(
- Madrid, CIEMAT
)
,
Claude Amsler
(
- Zurich U.
)

et al.

- Phys.Lett.B 592 (2004) 1-4, 1
•
DOI:
- 10.1016/j.physletb.2004.06.001

Tau physics: A Theoretical perspective

William J. Marciano
(
- Brookhaven
)

- Nucl.Phys.B Proc.Suppl. 40 (1995) 3-15,
- Tau Physics 1994:0003-16,
- In *Montreux 1994, Proceedings, TAU 94* 3-15,
- Nucl. Phys. B, Proc. Suppl. 40 (1995) 3-15, and Brookhaven Nat. Lab. Upton - BNL-61141 (94/11,rec.Jan.95) 12 p. (504233)
•
DOI:
- 10.1016/0920-5632(95)00126-T

Search for baryon and lepton number violating decays of the tau lepton

CLEO

Collaboration

•

R. Godang
(
- Virginia Tech.
)

et al.

- Phys.Rev.D 59 (1999) 091303
•
e-Print:
- hep-ex/9902005
•
DOI:
- 10.1103/PhysRevD.59.091303

Baryon number violation involving higher generations

Wei-Shu Hou
(
- Taiwan, Natl. Taiwan U. and
- SLAC
)
,
Makiko Nagashima
(
- Taiwan, Natl. Taiwan U.
)
,
Andrea Soddu
(
- Taiwan, Natl. Taiwan U. and
- Weizmann Inst.
)

- Phys.Rev.D 72 (2005) 095001
•
e-Print:
- hep-ph/0509006
•
DOI:
- 10.1103/PhysRevD.72.095001

Overview of the KEKB accelerators

S. Kurokawa
(
- KEK, Tsukuba
)
,
Eiji Kikutani
(
- KEK, Tsukuba
)

- Nucl.Instrum.Meth.A 499 (2003) 1-7
•
DOI:
- 10.1016/S0168-9002(02)01771-0

The Belle Detector

Belle

Collaboration

•

A. Abashian

et al.

- Nucl.Instrum.Meth.A 479 (2002) 117-232
•
DOI:
- 10.1016/S0168-9002(01)02013-7

Electron identification in Belle

- Nucl.Instrum.Meth.A 485 (2002) 490-503
•
e-Print:
- hep-ex/0108044
•
DOI:
- 10.1016/S0168-9002(01)02113-1

Muon identification in the Belle experiment at KEKB

et al.

- Nucl.Instrum.Meth.A 491 (2002) 1-2, 69-82
•
DOI:
- 10.1016/S0168-9002(02)01164-6

Koralb: An Upgrade to version 2.4

Stanislaw Jadach
(
- Cracow, INP and
- CERN
)
,
Zbigniew Was
(
- Cracow, INP and
- CERN
)

- Comput.Phys.Commun. 85 (1995) 453-462
•
DOI:
- 10.1016/0010-4655(94)00091-F

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics: Jetset Version 6.2

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Comput.Phys.Commun. 39 (1986) 347-407
•
DOI:
- 10.1016/0010-4655(86)90096-2

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics. Jetset Version 6.3: An Update

- Comput.Phys.Commun. 43 (1987) 367
•
DOI:
- 10.1016/0010-4655(87)90054-3

- Comput.Phys.Commun. 79 305

The Precision Monte Carlo event generator K K for two fermion final states in e+ e- collisions

S. Jadach
(
- DESY and
- Cracow, INP and
- CERN
)
,
B.F.L. Ward
(
- Tennessee U. and
- CERN and
- SLAC
)
,
Z. Was
(
- Cracow, INP and
- CERN
)

- Comput.Phys.Commun. 130 (2000) 260-325
•
e-Print:
- hep-ph/9912214
•
DOI:
- 10.1016/S0010-4655(00)00048-5

Monte Carlo Simulation of Two Photon Processes. 2. Complete Lowest Order Calculations for Four Lepton Production Processes in electron Positron Collisions

- Comput.Phys.Commun. 40 (1986) 285-307,
- Comput. Phys. Commun. 40 ( 1986) 285-307
•
DOI:
- 10.1016/0010-4655(86)90115-3

GEANT3

The Principal axis of jets. An Attempt to analyze high-energy collisions as two-body processes

- Phys.Lett. 12 (1964) 57-61
•
DOI:
- 10.1016/0031-9163(64)91176-X

A QCD Test for Jets

Edward Farhi
(
- Harvard U.
)

- Phys.Rev.Lett. 39 (1977) 1587-1588
•
DOI:
- 10.1103/PhysRevLett.39.1587

Search for charmless two-body baryonic decays of B mesons

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 65 (2002) 091103
•
e-Print:
- hep-ex/0203027
•
DOI:
- 10.1103/PhysRevD.65.091103

A Unified approach to the classical statistical analysis of small signals

Gary J. Feldman
(
- Harvard U.
)
,
Robert D. Cousins
(
- UCLA
)

- Phys.Rev.D 57 (1998) 3873-3889
•
e-Print:
- physics/9711021
•
DOI:
- 10.1103/PhysRevD.57.3873

- Phys.Rev.D 63 3873

An Upper bound on the decay tau ---> mu gamma from Belle

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 92 (2004) 171802
•
e-Print:
- hep-ex/0310029
•
DOI:
- 10.1103/PhysRevLett.92.171802

Search for the lepton flavor violating decay $\tau^{-} \to \mu^{-} \eta$ at Belle

Belle

Collaboration

•

Y. Enari
(
- Nagoya U.
)

et al.

- Phys.Rev.Lett. 93 (2004) 081803
•
e-Print:
- hep-ex/0404018
•
DOI:
- 10.1103/PhysRevLett.93.081803

Including systematic uncertainties in confidence interval construction for Poisson statistics

Jan Conrad
(
- Uppsala U.
)
,
O. Botner
(
- Uppsala U.
)
,
A. Hallgren
(
- Uppsala U.
)
,
Carlos Perez de los Heros
(
- Uppsala U.
)

- Phys.Rev.D 67 (2003) 012002
•
e-Print:
- hep-ex/0202013
•
DOI:
- 10.1103/PhysRevD.67.012002