First observation of top quark production in the forward region - INSPIRE

DataBETA

First observation of top quark production in the forward region

LHCb

Collaboration

Jun 2, 2015

10 pages

Published in:

Phys.Rev.Lett. 115 (2015) 11, 112001

Published: Sep 8, 2015

e-Print:

1506.00903 [hep-ex]

DOI:

10.1103/PhysRevLett.115.112001

PDG:

{{\mathit t}}{{\overline{\mathit t}}}

Production Cross Section in

{{\mathit p}}{{\mathit p}}

\sqrt {s }

Report number:

LHCB-PAPER-2015-022,
CERN-PH-EP-2015-132

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (APS)

Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 5020 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are σ(top)[7 TeV]=239±53(stat)±33(syst)±24(theory) fb,σ(top)[8 TeV]=289±43(stat)±40(syst)±29(theory) fb.These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.

14.65.Ha
13.87.-a
14.70.Fm
p p: scattering
p p: colliding beams
top: pair production
forward production
W: leptonic decay
charge: asymmetry
muon: transverse momentum

References(31)

Figures(9)

[1]

Top LHCb Physics

Alexander L. Kagan
(
- Cincinnati U. and
- Weizmann Inst.
)
,
Jernej F. Kamenik
(
- Stefan Inst., Ljubljana and
- Ljubljana U.
)
,
Gilad Perez
(
- Weizmann Inst.
)
,
Sheldon Stone
(
- Syracuse U.
)

- Phys.Rev.Lett. 107 (2011) 082003
•
e-Print:
- 1103.3747
•
DOI:
- 10.1103/PhysRevLett.107.082003

[2]

Leptonic top-quark asymmetry predictions at LHCb

Rhorry Gauld
(
- Oxford U.
)

- Phys.Rev.D 91 (2015) 054029
•
e-Print:
- 1409.8631
•
DOI:
- 10.1103/PhysRevD.91.054029

[3]

Feasibility of top quark measurements at LHCb and constraints on the large- $x$ gluon PDF

Rhorry Gauld
(
- Oxford U.
)

- JHEP 02 (2014) 126
•
e-Print:
- 1311.1810
•
DOI:
- 10.1007/JHEP02(2014)126

[4]

Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation

- Phys.Rev.Lett. 115 (2015) 5, 052001
•
e-Print:
- 1411.3007
•
DOI:
- 10.1103/PhysRevLett.115.052001

[5]

The anti- $k_t$ jet clustering algorithm

- JHEP 04 (2008) 063
•
e-Print:
- 0802.1189
•
DOI:
- 10.1088/1126-6708/2008/04/063

[6]

The LHCb Detector at the LHC

LHCb

Collaboration

•

A.Augusto Alves, Jr.
(
- Rio de Janeiro, CBPF
)

et al.

- JINST 3 (2008) S08005
•
DOI:
- 10.1088/1748-0221/3/08/S08005

[7]

LHCb Detector Performance

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Int.J.Mod.Phys.A 30 (2015) 07, 1530022
•
e-Print:
- 1412.6352
•
DOI:
- 10.1142/S0217751X15300227

[8]

The LHCb Trigger and its Performance in 2011

R Aaij
(
- Nikhef, Amsterdam
)
,
J Albrecht
(
- CERN
)
,
F Alessio
(
- CERN
)
,
S Amato
(
- Rio de Janeiro Federal U.
)
,
E Aslanides
(
- Marseille, CPPM
)

et al.

- JINST 8 (2013) P04022
•
e-Print:
- 1211.3055
•
DOI:
- 10.1088/1748-0221/8/04/P04022

[9]

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

[9]

A Brief Introduction to PYTHIA 8.1

Torbjorn Sjostrand
(
- CERN and
- Lund U.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- CERN and
- Fermilab
)

- Comput.Phys.Commun. 178 (2008) 852-867
•
e-Print:
- 0710.3820
•
DOI:
- 10.1016/j.cpc.2008.01.036

[10]

Handling of the generation of primary events in Gauss, the LHCb simulation framework

LHCb

Collaboration

•

I. Belyaev
(
- NIKHEF, Amsterdam and
- Moscow, ITEP
)

et al.

- J.Phys.Conf.Ser. 331 (2011) 032047
•
DOI:
- 10.1088/1742-6596/331/3/032047

[11]

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

[12]

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

[13]

Geant4 developments and applications

et al.

- IEEE Trans.Nucl.Sci. 53 (2006) 270
•
DOI:
- 10.1109/TNS.2006.869826

[13]

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

[14]

The LHCb simulation application, Gauss: Design, evolution and experience

LHCb

Collaboration

•

M. Clemencic
(
- CERN
)

et al.

- J.Phys.Conf.Ser. 331 (2011) 032023
•
DOI:
- 10.1088/1742-6596/331/3/032023

[15]

Radiative corrections to Z b anti-b production

John M. Campbell
(
- Fermilab
)
,
R.Keith Ellis
(
- Fermilab
)

- Phys.Rev.D 62 (2000) 114012
•
e-Print:
- hep-ph/0006304
•
DOI:
- 10.1103/PhysRevD.62.114012

[16]

New parton distributions for collider physics

Hung-Liang Lai
(
- Michigan State U. and
- Taipei Municipal U. of Education
)
,
Marco Guzzi
(
- Southern Methodist U.
)
,
Joey Huston
(
- Michigan State U.
)
,
Zhao Li
(
- Michigan State U.
)
,
Pavel M. Nadolsky
(
- Southern Methodist U.
)

et al.

- Phys.Rev.D 82 (2010) 074024
•
e-Print:
- 1007.2241
•
DOI:
- 10.1103/PhysRevD.82.074024

[17]

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX

Simone Alioli
(
- DESY, Zeuthen and
- INFN, Milan Bicocca
)
,
Paolo Nason
(
- INFN, Milan Bicocca
)
,
Carlo Oleari
(
- Milan Bicocca U. and
- INFN, Milan Bicocca
)
,
Emanuele Re
(
- Durham U., IPPP and
- INFN, Milan Bicocca
)

- JHEP 06 (2010) 043
•
e-Print:
- 1002.2581
•
DOI:
- 10.1007/JHEP06(2010)043

[18]

NNLOPS simulation of Higgs boson production

Keith Hamilton
(
- University Coll. London and
- CERN
)
,
Paolo Nason
(
- INFN, Milan Bicocca
)
,
Emanuele Re
(
- Oxford U., Theor. Phys.
)
,
Giulia Zanderighi
(
- Oxford U., Theor. Phys.
)

- JHEP 10 (2013) 222
•
e-Print:
- 1309.0017
•
DOI:
- 10.1007/JHEP10(2013)222

[19]

Study of $W$ boson production in association with beauty and charm

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- Phys.Rev.D 92 (2015) 5, 052001
•
e-Print:
- 1505.04051
•
DOI:
- 10.1103/PhysRevD.92.052001

[20]

FastJet User Manual

Matteo Cacciari
(
- Paris, LPTHE and
- Diderot U., Paris
)
,
Gavin P. Salam
(
- CERN and
- Princeton U. and
- Paris, LPTHE
)
,
Gregory Soyez
(
- Saclay, SPhT
)

- Eur.Phys.J.C 72 (2012) 1896
•
e-Print:
- 1111.6097
•
DOI:
- 10.1140/epjc/s10052-012-1896-2

[21]

Study of forward Z + jet production in pp collisions at $\sqrt{s} = 7$ TeV

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 01 (2014) 033
•
e-Print:
- 1310.8197
•
DOI:
- 10.1007/JHEP01(2014)033

[22]

Classification and regression trees, Wadsworth international group, Belmont, California, USA

L. Breiman
,
J.H. Friedman
,
R.A. Olshen
,
C.J. Stone

[23]

A Decision-Theoretic Generalization of On-Line Learning and an Application to Boosting

- J.Comput.Syst.Sci. 55 (1997) 1, 119-139
•
DOI:
- 10.1006/jcss.1997.1504

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