Resummed Differential Cross Sections for Top-Quark Pairs at the LHC

Autoren

Benjamin D Pecjak
Darren J Scott
Xing Wang
Li Lin Yang

DOI

10.1103/physrevlett.116.202001

eISSN

1079-7114

ISSN

0031-9007

Ausgabe der Veröffentlichung

20

Zeitschrift

Physical Review Letters

Sprache

en

Artikelnummer

202001

Online publication date

2016

Status

Published online

Herausgeber

American Physical Society (APS)

Herausgeber URL

http://dx.doi.org/10.1103/physrevlett.116.202001

Datum der Datenerfassung

2017

Titel

Resummed Differential Cross Sections for Top-Quark Pairs at the LHC

Ausgabe der Zeitschrift

116

Data source: Crossref

Abstract

We present state of the art resummation predictions for differential cross sections in top-quark pair production at the LHC. They are derived from a formalism which allows the simultaneous resummation of both soft and small-mass logarithms, which endanger the convergence of fixed-order perturbative series in the boosted regime, where the partonic center-of-mass energy is much larger than the mass to the top quark. We combine such a double resummation at next-to-next-to-leading logarithmic^{'} (NNLL^{'}) accuracy with standard soft-gluon resummation at next-to-next-to-leading logarithmic accuracy and with next-to-leading-order calculations, so that our results are applicable throughout the whole phase space. We find that the resummation effects on the differential distributions are significant, bringing theoretical predictions into better agreement with experimental data compared to fixed-order calculations. Moreover, such effects are not well described by the next-to-next-to-leading-order approximation of the resummation formula, especially in the high-energy tails of the distributions, highlighting the importance of all-orders resummation in dedicated studies of boosted top production.

Addresses

Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE Durham, United Kingdom.

Autoren

Benjamin D Pecjak
Darren J Scott
Xing Wang
Li Lin Yang

DOI

10.1103/physrevlett.116.202001

eISSN

1079-7114

Externe Identifier

PubMed Identifier: 27258864

Funding acknowledgements

National Natural Science Foundation of China: 11575004
Science and Technology Facilities Council: ST/G000905/1
Science and Technology Facilities Council:
Science and Technology Facilities Council: 1322472

Open access

false

ISSN

0031-9007

Ausgabe der Veröffentlichung

20

Zeitschrift

Physical review letters

Sprache

eng

Medium

Print-Electronic

Online publication date

2016

Paginierung

202001

Datum der Veröffentlichung

2016

Status

Published

Datum der Datenerfassung

2016

Titel

Resummed Differential Cross Sections for Top-Quark Pairs at the LHC.

Sub types

Journal Article

Ausgabe der Zeitschrift

116

Data source: Europe PubMed Central

Abstract

We present state of the art resummation predictions for differential cross sections in top-quark pair production at the LHC. They are derived from a formalism which allows the simultaneous resummation of both soft and small-mass logarithms, which endanger the convergence of fixed-order perturbative series in the boosted regime, where the partonic center-of-mass energy is much larger than the mass to the top quark. We combine such a double resummation at next-to-next-to-leading logarithmic^{'} (NNLL^{'}) accuracy with standard soft-gluon resummation at next-to-next-to-leading logarithmic accuracy and with next-to-leading-order calculations, so that our results are applicable throughout the whole phase space. We find that the resummation effects on the differential distributions are significant, bringing theoretical predictions into better agreement with experimental data compared to fixed-order calculations. Moreover, such effects are not well described by the next-to-next-to-leading-order approximation of the resummation formula, especially in the high-energy tails of the distributions, highlighting the importance of all-orders resummation in dedicated studies of boosted top production.

Autoren

Benjamin D Pecjak
Darren J Scott
Xing Wang
Li Lin Yang

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/27258864

DOI

10.1103/PhysRevLett.116.202001

eISSN

1079-7114

Ausgabe der Veröffentlichung

20

Zeitschrift

Phys Rev Lett

Sprache

eng

Country

United States

Paginierung

202001

Datum der Veröffentlichung

2016

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2018

Titel

Resummed Differential Cross Sections for Top-Quark Pairs at the LHC.

Sub types

Journal Article

Ausgabe der Zeitschrift

116

Data source: PubMed

Abstract

We present state of the art resummation predictions for differential cross sections in top-quark pair production at the LHC. They are derived from a formalism which allows the simultaneous resummation of both soft and small-mass logarithms, which endanger the convergence of fixed-order perturbative series in the boosted regime, where the partonic center-of-mass energy is much larger than the mass to the top quark. We combine such a double resummation at NNLL$'$ accuracy with standard soft-gluon resummation at NNLL accuracy and with NLO calculations, so that our results are applicable throughout the whole phase space. We find that the resummation effects on the differential distributions are significant, bringing theoretical predictions into better agreement with experimental data compared to fixed-order calculations. Moreover, such effects are not well described by the NNLO approximation of the resummation formula, especially in the high-energy tails of the distributions, highlighting the importance of all-orders resummation in dedicated studies of boosted top production.

Autoren

Benjamin D Pecjak
Darren J Scott
Xing Wang
Li Lin Yang

Autoren-URL

http://arxiv.org/abs/1601.07020v2

Zeitschrift

Phys. Rev. Lett.

Schlüsselwörter

hep-ph
hep-ph

Notes

5 pages, 5 figures; minor notational changes

Paginierung

202001

Datum der Veröffentlichung

2016

Herausgeber URL

http://dx.doi.org/10.1103/PhysRevLett.116.202001

Datum der Datenerfassung

2016

Datum, an dem der Datensatz öffentlich gemacht wurde

2016

Titel

Resummed differential cross sections for top-quark pairs at the LHC

Ausgabe der Zeitschrift

116

Files

1601.07020v2.pdf

Data source: arXiv

Resummed Differential Cross Sections for Top-Quark Pairs at the LHC

Files

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