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Precision collider physics from effective field theory

English title Precision collider physics from effective field theory
Applicant Becher Thomas
Number 140978
Funding scheme Project funding
Research institution Institut für Theoretische Physik Universität Bern
Institution of higher education University of Berne - BE
Main discipline Theoretical Physics
Start/End 01.04.2012 - 31.03.2014
Approved amount 233'895.00
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Keywords (6)

soft-collinear effective theory; quantum chromodynamics; resummations of perturbation theory; effective field theory; particle physics; hadronic collisions

Lay Summary (English)

Lead
Lay summary

To search for new physics at the Large Hadron Collider (LHC), it is important to have precise theoretical predictions of collider processes. The biggest challenge in this context is the computation of the effect of the strong interaction described by Quantum Chromo-Dynamics (QCD). For sufficiently inclusive observables, the QCD effects can be calculated in an expansion in the strong coupling constant. However, for quantities involving disparate scales, large logarithms of scale ratios can spoil this expansion. The goal of this project is to obtain precision predictions for electroweak boson production processes at the LHC by using effective field theory methods to resum logarithmically enhanced contributions to all orders. In particular, we will improve the theoretical predictions for W, Z and Higgs boson production both at small and at large transverse momentum. A second goal is to extend the effective theory methods to more exclusive observables, in particular to jet cross sections.


Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Transverse-momentum spectra of electroweak bosons near threshold at NNLO
Becher Thomas, Bell Guido, Lorentzen Christian, Marti Stefanie (2014), Transverse-momentum spectra of electroweak bosons near threshold at NNLO, in JHEP, 1402, 004-004.
Electroweak Sudakov effects in W, Z and $/gamma$ production at large transverse momentum
Becher Thomas, Garcia i Tormo Xavier (2013), Electroweak Sudakov effects in W, Z and $/gamma$ production at large transverse momentum, in Phys.Rev., D88(1), 013009-013009.
Factorization and $N^{3}LL_p$+NNLO predictions for the Higgs cross section with a jet veto
Becher Thomas, Neubert Matthias, Rothen Lorena (2013), Factorization and $N^{3}LL_p$+NNLO predictions for the Higgs cross section with a jet veto, in JHEP, 1310, 125-125.
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties
Heinemeyer S (2013), Handbook of LHC Higgs Cross Sections: 3. Higgs Properties, in CERN Yellow Book, 1-404.
Higgs-Boson Production at Small Transverse Momentum
Becher Thomas, Neubert Matthias, Wilhelm Daniel (2013), Higgs-Boson Production at Small Transverse Momentum, in JHEP, 1305, 110-110.
Massive Boson Production at Small q_T in Soft-Collinear Effective Theory
Becher Thomas, Neubert Matthias, Wilhelm Daniel (2013), Massive Boson Production at Small q_T in Soft-Collinear Effective Theory, in Nucl.Phys.Proc.Suppl., 234, 85-88.
Analytic Regularization in Soft-Collinear Effective Theory
Becher Thomas, Bell Guido (2012), Analytic Regularization in Soft-Collinear Effective Theory, in Phys.Lett., B713, 41-46.
Electroweak gauge-boson and Higgs production at Small $q_T$: Infrared safety from the collinear anomaly
Becher Thomas, Neubert Matthias, Wilhelm Daniel (2012), Electroweak gauge-boson and Higgs production at Small $q_T$: Infrared safety from the collinear anomaly, in DESY-PROC-2012-02/314.
Factorization and NNLL Resummation for Higgs Production with a Jet Veto
Becher Thomas, Neubert Matthias (2012), Factorization and NNLL Resummation for Higgs Production with a Jet Veto, in JHEP, 1207, 108-108.
NNLL Resummation for Jet Broadening
Becher Thomas, Bell Guido (2012), NNLL Resummation for Jet Broadening, in JHEP, 1211, 126-126.
NNLO soft function for electroweak boson production at large transverse momentum
Becher Thomas, Bell Guido, Marti Stefanie (2012), NNLO soft function for electroweak boson production at large transverse momentum, in JHEP, 1204, 034-034.
Precision Direct Photon and W-Boson Spectra at High p_T and Comparison to LHC Data
Becher Thomas, Lorentzen Christian, Schwartz Matthew D. (2012), Precision Direct Photon and W-Boson Spectra at High p_T and Comparison to LHC Data, in Phys.Rev., D86, 054026-054026.

Collaboration

Group / person Country
Types of collaboration
Prof. M. Schwartz/Harvard University United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Dr. G. Bell/Oxford University Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. A. Ferroglia/CUNY United States of America (North America)
- Publication
Prof. M. Neubert/Universität Mainz Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
SCET 2014 - XIth Annual Workshop on Soft-Collinear Effective Theory Talk given at a conference Transverse-momentum spectra of electroweak bosons near threshold at NNLO 26.03.2014 München, Germany Becher Thomas;
International Conference on Flavor Physics and Mass Generation Talk given at a conference Precision Predictions for Higgs 10.02.2014 Singapore, Singapore Becher Thomas;
ESI Program on Jets and Quantum Fields for LHC and Future Colliders Individual talk Higgs production with a jet veto: resummation 28.07.2013 ESI Wien, Austria Becher Thomas;
KITP Program: Exploring TeV Scale New Physics with LHC Data Individual talk Higgs Production with a Jet Veto 01.06.2013 UC Santa Barbara, United States of America Becher Thomas;
Conference “The first three years of the LHC” Talk given at a conference Resummation for Higgs cross sections 18.03.2013 Mainz, Germany Becher Thomas;
Conference “Aspen 2013 - Higgs Quo Vadis” Talk given at a conference QCD Predictions for Higgs Physics 10.03.2013 Aspen, United States of America Becher Thomas;
Higgs Cross Section Working Group Meeting “Jet issues in Higgs physics” Talk given at a conference NNLL resummation for Higgs production with a jet veto 12.10.2012 Geneva, Switzerland Becher Thomas;
Conference “Xth Quark Confinement and the Hadron Spectrum” Talk given at a conference Collider physics with Soft-Collinear Effective Theory 08.10.2012 Munich, Germany Becher Thomas;
44. Herbstschule für Hochenergiephysik Talk given at a conference W/Z/gamma-Produktion bei grossem pT in SCET 04.09.2012 Maria Laach, Germany Marti Stefanie;
Physics at LHC (PLHC2012) Talk given at a conference Resummation for QCD and EW cross-sections at the LHC 04.06.2012 Vancouver, Canada Becher Thomas;
Sixth International Conference on Quarks and Nuclear Physics (QNP2012) Talk given at a conference Soft-Collinear Effective Theory 16.04.2012 Palaiseau, France Becher Thomas;


Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
Kantonale Fachschaftstagung (Fata2012) 01.11.2012 Gymnasium Burgdorf, Switzerland Becher Thomas;


Associated projects

Number Title Start Funding scheme
153294 Precision jet physics from effective field theory 01.04.2014 Project funding
130404 Collider physics with effective field theory methods 01.04.2010 Project funding

Abstract

The goal of this project is to obtain precision predictions for electroweak boson production processes at the LHC by using effective field theory methods to resum logarithmically enhanced contributions to all orders. In particular, we want to improve the theoretical predictions for W, Z and Higgs boson production both at small and at large transverse momentum q_T. In addition to computing hadronically inclusive quantities at next-to-next-to-leading logarithmic accuracy and beyond, we also want to resum enhanced corrections to Higgs production in association with a low-q_T jet. This process is relevant as part of the Higgs search, and the corresponding analysis is an important step to develop the necessary techniques to be able to perform higher-log resummations for multi-jet observables.
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