A search for $t \to tau \nu q$ in $t\bar{t}$ production.

We present a search for tt¯ events with a tau lepton in the final state. The data sample corresponds to an integrated luminosity of 194 pb −1 collected with the CDF II detector from pp¯ collisions at a center of mass energy of 1.96 TeV. We observe two events with an expected signal of 1.0±0.2 events and a background of 1.3±0.3 events. We determine a 95% confidence level upper limit on rτ , the ratio of the measured rate of t→τνq to the expectation, of 5.2.

Note:

7 pages, 1 figure, published version

14.60.Fg
14.65.Ha
anti-p p: colliding beams
anti-p p: inclusive reaction
top: pair production
top: semileptonic decay
tau: semileptonic decay
electroweak interaction: validity test
CDF
experimental results

References(21)

Figures(2)

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

Hidden Top Quark With Charged Higgs Decay

Vernon D. Barger
(
- Wisconsin U., Madison
)
,
R.J.N. Phillips
(
- Rutherford
)

- Phys.Rev.D 41 (1990) 884
•
DOI:
- 10.1103/PhysRevD.41.884

Implications on the supersymmetric Higgs sector from top quark decays at the Tevatron

- Phys.Lett.B 416 (1998) 353-360
•
e-Print:
- hep-ph/9707535
•
DOI:
- 10.1016/S0370-2693(97)01247-1

Search for the charged Higgs Boson in the Decays of Top Quark Pairs in the $e \tau$ and $\mu \tau$ Channels at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

T. Affolder
(
- LBL, Berkeley
)

et al.

- Phys.Rev.D 62 (2000) 012004
•
e-Print:
- hep-ex/9912013
•
DOI:
- 10.1103/PhysRevD.62.012004

Top quark decay via R-parity violating interactions at the Tevatron

Tao Han
(
- Wisconsin U., Madison
)
,
M.B. Magro
(
- Wisconsin U., Madison
)

- Phys.Lett.B 476 (2000) 79-86
•
e-Print:
- hep-ph/9911442
•
DOI:
- 10.1016/S0370-2693(00)00112-X

Nonuniversal gauge bosons Z-prime and rare top decays

Chong-xing Yue
(
- Liaoning Normal U.
)
,
Hong-jie Zong
(
- Henan Normal U.
)
,
Lan-jun Liu
(
- Henan Normal U.
)

- Mod.Phys.Lett.A 18 (2003) 2187-2194
•
e-Print:
- hep-ph/0309255
•
DOI:
- 10.1142/S0217732303011915

Observation of top quark production in $\bar{p}p$ collisions

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 74 (1995) 2626-2631
•
e-Print:
- hep-ex/9503002
•
DOI:
- 10.1103/PhysRevLett.74.2626

Observation of the top quark

D0

Collaboration

•

S. Abachi
(
- Fermilab
)

et al.

- Phys.Rev.Lett. 74 (1995) 2632-2637
•
e-Print:
- hep-ex/9503003
•
DOI:
- 10.1103/PhysRevLett.74.2632

The t anti-t cross-section at 1.8-TeV and 1.96-TeV: A Study of the systematics due to parton densities and scale dependence

M. Cacciari
(
- Parma U. and
- INFN, Parma
)
,
S. Frixione
(
- INFN, Genoa
)
,
M.L. Mangano
(
- CERN
)
,
P. Nason
(
- INFN, Milan
)
,
G. Ridolfi
(
- INFN, Genoa
)

- JHEP 04 (2004) 068
•
e-Print:
- hep-ph/0303085
•
DOI:
- 10.1088/1126-6708/2004/04/068

Next-to-next-to-leading order soft gluon corrections in top quark hadroproduction

Nikolaos Kidonakis
(
- Cambridge U.
)
,
Ramona Vogt
(
- LBL, Berkeley and
- UC, Davis
)

- Phys.Rev.D 68 (2003) 114014
•
e-Print:
- hep-ph/0308222
•
DOI:
- 10.1103/PhysRevD.68.114014

The mu tau and e tau decays of top quark pairs produced in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 79 (1997) 3585-3590
•
e-Print:
- hep-ex/9704007
•
DOI:
- 10.1103/PhysRevLett.79.3585

Measurement of the $J/\psi$ meson and $b-$ hadron production cross sections in $p\bar{p}$ collisions at $\sqrt{s} = 1960$ GeV

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.D 71 (2005) 032001
•
e-Print:
- hep-ex/0412071
•
DOI:
- 10.1103/PhysRevD.71.032001

Measurement of the $t\bar{t}$ production cross section in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV using kinematic fitting of $b-$ tagged lepton + jet events

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.D 71 (2005) 072005
•
e-Print:
- hep-ex/0409029
•
DOI:
- 10.1103/PhysRevD.71.072005

First measurements of inclusive $W$ and $Z$ cross sections from Run II of the Tevatron collider

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.Lett. 94 (2005) 091803
•
e-Print:
- hep-ex/0406078
•
DOI:
- 10.1103/PhysRevLett.94.091803

Measurement of the $t\bar{t}$ production cross section in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV using dilepton events

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.Lett. 93 (2004) 142001
•
e-Print:
- hep-ex/0404036
•
DOI:
- 10.1103/PhysRevLett.93.142001

High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4

Torbjorn Sjostrand
(
- CERN
)

- Comput.Phys.Commun. 82 (1994) 74-90,
- CERN Geneva - TH. 7111 (93/12,rec.Jan.94) 17 p. and e: CERN th-7111-93
•
DOI:
- 10.1016/0010-4655(94)90132-5