Charge asymmetries of top quarks at hadron colliders revisited - INSPIRE

DataBETA

Charge asymmetries of top quarks at hadron colliders revisited

Johann H. Kuhn
(
- KIT, Karlsruhe
)
,
German Rodrigo
(
- KIT, Karlsruhe and
- Valencia U., IFIC
)

Sep, 2011

23 pages

Published in:

JHEP 01 (2012) 063

e-Print:

1109.6830 [hep-ph]

DOI:

10.1007/JHEP01(2012)063

Report number:

LPN11-52,
TTP11-26,
IFIC-11-45

View in:

ADS Abstract Service

reference search263 citations

Citations per year

Abstract: (arXiv)

A sizeable difference in the differential production cross section of top- compared to antitop-quark production, denoted charge asymmetry, has been observed at the Tevatron. The experimental results seem to exceed the theory predictions based on the Standard Model by a significant amount and have triggered a large number of suggestions for "new physics". In the present paper the Standard Model predictions for Tevatron and LHC experiments are revisited. This includes a reanalysis of electromagnetic as well as weak corrections, leading to a shift of the asymmetry by roughly a factor 1.1 when compared to the results of the first papers on this subject. The impact of cuts on the transverse momentum of the top-antitop system is studied. Restricting the ttbar system to a transverse momentum less than 20 GeV leads to an enhancement of the asymmetries by factors between 1.3 and 1.5, indicating the importance of an improved understanding of the

t\bar t

-momentum distribution. Predictions for similar measurements at the LHC are presented, demonstrating the sensitivity of the large rapidity region both to the Standard Model contribution and effects from "new physics".

Note:

23 pages. Final version to appear in JHEP

top: charge: asymmetry
Batavia TEVATRON Coll
top: transverse momentum
CERN LHC Coll
new physics
experimental results
correction: electromagnetic
rapidity
final-state interaction
heavy quark: hadroproduction

References(54)

Figures(25)

[1]

Precision measurements of the top quark mass from the Tevatron in the pre-LHC era

Angela Barbaro Galtieri
(
- LBL, Berkeley
)
,
Fabrizio Margaroli
(
- Purdue U.
)
,
Igor Volobouev
(
- Texas Tech.
)

- Rept.Prog.Phys. 75 (2012) 056201
•
e-Print:
- 1109.2163
•
DOI:
- 10.1088/0034-4885/75/5/056201

[2]

Precision predictions for the t+t(bar) production cross section at hadron colliders

Valentin Ahrens
(
- Mainz U., Inst. Phys.
)
,
Andrea Ferroglia
(
- New York City Coll. Tech.
)
,
Matthias Neubert
(
- Mainz U., Inst. Phys.
)
,
Ben D. Pecjak
(
- Mainz U., Inst. Phys.
)
,
Li Lin Yang
(
- Zurich U.
)

- Phys.Lett.B 703 (2011) 135-141
•
e-Print:
- 1105.5824
•
DOI:
- 10.1016/j.physletb.2011.07.058

[3]

Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC

Matteo Cacciari
(
- Paris, LPTHE
)
,
Stefano Frixione
(
- CERN and
- ITPP, Lausanne
)
,
Michelangelo L. Mangano
(
- CERN
)
,
Paolo Nason
(
- INFN, Milan Bicocca
)
,
Giovanni Ridolfi
(
- CERN and
- Genoa U. and
- INFN, Genoa
)

- JHEP 09 (2008) 127
•
e-Print:
- 0804.2800
•
DOI:
- 10.1088/1126-6708/2008/09/127

[4]

Theoretical status and prospects for top-quark pair production at hadron colliders

Sven Moch
(
- DESY, Zeuthen
)
,
Peter Uwer
(
- Karlsruhe U.
)

- Phys.Rev.D 78 (2008) 034003
•
e-Print:
- 0804.1476
•
DOI:
- 10.1103/PhysRevD.78.034003

[5]

Next-to-next-to-leading soft-gluon corrections for the top quark cross section and transverse momentum distribution

Nikolaos Kidonakis
(
- Kennesaw State U.
)

- Phys.Rev.D 82 (2010) 114030
•
e-Print:
- 1009.4935
•
DOI:
- 10.1103/PhysRevD.82.114030

[6]

Measurement of the Top Pair Production Cross Section in the Dilepton Decay Channel in $p\bar{p}$ Collisions at $\sqrt{s}= 1.96$ TeV

CDF

Collaboration

•

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

et al.

- Phys.Rev.D 82 (2010) 052002
•
e-Print:
- 1002.2919
•
DOI:
- 10.1103/PhysRevD.82.052002

[7]

Measurement of the t anti-t production cross section and top quark mass extraction using dilepton events in p anti-p collisions

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Lett.B 679 (2009) 177-185
•
e-Print:
- 0901.2137
•
DOI:
- 10.1016/j.physletb.2009.07.032

[8]

ATLAS Collaboration

[9]

CMS Collaboration

[10]

Top quarks, axigluons and charge asymmetries at hadron colliders

Oscar Antunano
(
- Valencia U., IFIC
)
,
Johann H. Kuhn
(
- Karlsruhe U., TTP
)
,
German Rodrigo
(
- Valencia U., IFIC
)

- Phys.Rev.D 77 (2008) 014003
•
e-Print:
- 0709.1652
•
DOI:
- 10.1103/PhysRevD.77.014003

[11]

Charge asymmetry of heavy quarks at hadron colliders

Johann H. Kuhn
(
- Karlsruhe U., TTP
)
,
German Rodrigo
(
- INFN, Florence
)

- Phys.Rev.D 59 (1999) 054017
•
e-Print:
- hep-ph/9807420
•
DOI:
- 10.1103/PhysRevD.59.054017

[12]

Charge asymmetry in hadroproduction of heavy quarks

Johann H. Kuhn
(
- Karlsruhe U., TTP
)
,
German Rodrigo
(
- Karlsruhe U., TTP
)

- Phys.Rev.Lett. 81 (1998) 49-52
•
e-Print:
- hep-ph/9802268
•
DOI:
- 10.1103/PhysRevLett.81.49

[13]

Standard model top quark asymmetry at the Fermilab Tevatron

M.T. Bowen
(
- Washington U., Seattle
)
,
S.D. Ellis
(
- Washington U., Seattle
)
,
D. Rainwater
(
- Rochester U.
)

- Phys.Rev.D 73 (2006) 014008
•
e-Print:
- hep-ph/0509267
•
DOI:
- 10.1103/PhysRevD.73.014008

[14]

Forward-backward asymmetry in top quark-antiquark production

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.D 84 (2011) 112005
•
e-Print:
- 1107.4995
•
DOI:
- 10.1103/PhysRevD.84.112005

[15]

[ ], D0 Note 6062

D0 Collaboration

[16]

First measurement of the forward-backward charge asymmetry in top quark pair production

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 100 (2008) 142002
•
e-Print:
- 0712.0851
•
DOI:
- 10.1103/PhysRevLett.100.142002

[17]

T. Schwarz
,
CDF Collaboration

[18]

Measurement of the Forward Backward Asymmetry in Top Pair Production in the Dilepton Decay Channel using 5.1 fb − 1

CDF

Collaboration

[19]

Evidence for a Mass Dependent Forward-Backward Asymmetry in Top Quark Pair Production

CDF

Collaboration

•

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

et al.

- Phys.Rev.D 83 (2011) 112003
•
e-Print:
- 1101.0034
•
DOI:
- 10.1103/PhysRevD.83.112003

[20]

CDF Collaboration

[21]

Forward-Backward Asymmetry in Top Quark Production in $p\bar{p}$ Collisions at $sqrt{s}=1.96$ TeV

CDF

Collaboration

•

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

et al.

- Phys.Rev.Lett. 101 (2008) 202001
•
e-Print:
- 0806.2472
•
DOI:
- 10.1103/PhysRevLett.101.202001

[22]

Measurement of the charge asymmetry in top-antitop quark production with the CDF II experiment

Julia Weinelt
(
- Karlsruhe U., EKP
)

DOI:
- 10.2172/911835

[22]

IEKP-KA2006-21

[23]

Measurement of the Charge Asymmetry and the W Boson Helicity in Top- Antitop Quark Events with the CDF II Experiment

Dominic Hirschbuehl
(
- Karlsruhe U., EKP
)

DOI:
- 10.2172/897585

[24]

Measurement of the Front Back Asymmetry in Top-Antitop Quark Pairs Produced in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

Thomas A. Schwarz
(
- Michigan U.
)

DOI:
- 10.2172/902875

1-25 of 54
1
2
3
25 / page