相关参考文献
注意：仅列出部分参考文献，下载原文获取全部文献信息。
Article
Physics, Particles & Fields
Joe Davighi et al.
Summary: This study derives new effective field theory positivity bounds on the elastic 2 -> 2 scattering amplitudes of massive spinning particles based on the standard UV properties of unitarity, causality, locality, and Lorentz invariance. By bounding the t derivatives of the amplitude, stronger unitarity bounds on the s- and u-channel branch cuts are obtained. These bounds provide stronger constraints beyond the forward limit and can be used to constrain dimension-6 interactions with a milder assumption about the high-energy growth of the UV amplitude.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Luigi Del Debbio et al.
Summary: In this study, the Bayesian approach to solution of inverse problems is discussed and applied to analyze the closure tests performed by the NNPDF collaboration. Insights gained from analytical results are used to guide the analysis of more complex non-linear problems. The study shows that the posterior probability density of the parametrized parton distributions (PDFs) can be fully determined by the NNPDF fitting procedure in the case of Gaussian distributions. New estimators are introduced to assess the statistical reliability of the closure test results, and these estimators are analyzed using the Bayesian formalism in a linear model to clarify their meaning. Results from closure tests performed with the NNPDF methodologies are presented to validate the NNPDF4.0 methodology and provide a quantitative comparison with the NNPDF3.1 methodology.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Richard D. Ball et al.
Summary: This study evaluated the uncertainties due to nuclear effects on proton parton distribution functions in global fits, utilizing an iterative procedure to determine both proton and deuteron PDFs simultaneously. It was found that the impact of nuclear uncertainty on proton PDFs is minimal, and overall uncertainties are insignificant once corrections for nuclear effects are made.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Richard D. Ball et al.
Summary: The software framework for the NNPDF4.0 global determination of parton distribution functions (PDFs) is released under an open source license, providing extensive documentation and examples for users. The framework includes tools for PDF fitting, handling experimental data, comparing it to theoretical predictions, and conducting versatile analysis. The public release of the NNPDF fitting framework ensures reproducibility of the NNPDF4.0 determination and enables various phenomenological applications and PDF fits based on user-defined data and theory assumptions.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Emanuele Bagnaschi et al.
Summary: The discussion focuses on determining electroweak parameters from hadron collider observables, particularly the W-boson mass measurement. By revising the procedures to include the uncertainty of proton structure and treating PDF uncertainty as a source of systematic error, the correlation between kinematic distributions and PDF variations can be automatically included in the fit, leading to a reduction in PDF uncertainty. This improvement relies on systematic accounting of QCD-based PDF model features using current available information, suggesting that proton PDF uncertainty may not be a bottleneck for precision measurements in the future.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Riccardo Torre et al.
Summary: This paper provides theoretical predictions of high-energy neutral and charged Drell-Yan differential cross-section measurements, including new physics effects at the Next-to-Leading order in QCD. The predictions are obtained from SM Monte Carlo simulations through analytic reweighting, enabling the exploration of all relevant interactions. Projections for the sensitivity of LHC and HL-LHC measurements are presented, along with quantification of the impact of several sources of uncertainties.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Jacob J. Ethier et al.
Summary: In this study, a global interpretation of Higgs, diboson, and top quark measurements at the LHC was presented within the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. By constraining 36 independent directions in the parameter space, and incorporating both linear and quadratic corrections, the study demonstrated the importance of including NLO QCD and O (Lambda(-4)) effects for accurately mapping the posterior distributions associated with the fitted Wilson coefficients. The results highlight the interplay and complementarity between top quark, Higgs, and diboson measurements, and pave the way for more global SMEFT interpretations extended to other high-p(T) processes and low-energy observables.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
S. Bailey et al.
Summary: The new MSHT20 set of parton distribution functions (PDFs) of the proton, determined from global analyses of hard scattering data, includes updates such as improved parameterizations, new precise data, and NNLO QCD corrections. The NNLO fit is strongly favored over the NLO due to wider range and increased precision of data included in the fit, resulting in reduced uncertainties in predictions for processes such as Higgs, top quark pair, and W, Z production at post LHC Run-II energies.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
John Ellis et al.
Summary: The search for effective field theory deformations of the Standard Model is conducted through a global approach in the framework of the Standard Model Effective Field Theory. The analysis includes constraints on the coefficients of SMEFT operators and explores specific ultra-violet completions of the Standard Model, but does not find significant evidence for physics beyond the Standard Model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Admir Greljo et al.
Summary: The study assessed for the first time the interplay between PDFs and EFT effects for high-mass Drell-Yan processes, finding the interaction to be moderate for the current dataset but a significant challenge for EFT analyses at the HL-LHC.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Giuliano Panico et al.
Summary: The study investigates the potential of fully-differential measurements of high-energy dilepton cross-sections at the LHC to probe heavy new physics encapsulated in dimension-6 interaction operators. Results show a considerable sensitivity improvement relative to single-differential measurements due to the possibility of probing more directions in the seven-dimensional parameter space at the interference level. The reduction of parton distribution function uncertainties in the fully-differential fit is also found to play a significant role.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Radja Boughezal et al.
Summary: This study examines the inclusion of O(1/Lambda(4)) effects in fits to current LHC Drell-Yan data within the Standard Model effective field theory. The analysis finds that including dimension-6 squared terms and certain dimension-8 operators significantly impacts the data fits, and neglecting them leads to large errors in constraining dimension-6 operators. Additionally, specific combinations of dimension-8 four-fermion operators at the TeV level can already be probed by LHC results and including them changes the limits found for dimension-6 operators.
Article
Astronomy & Astrophysics
Sally Dawson et al.
Summary: Drell Yan production, as a sensitive probe of new physics, has been calculated to high order in both the electroweak and QCD sectors of the standard model, allowing for precision comparisons between theory and data. The calculations have been extended to the standard model effective field theory, presenting the next-to-leading order QCD and electroweak contributions to the neutral Drell-Yan process.
Article
Astronomy & Astrophysics
Hao-Lin Li et al.
Summary: Utilizing group theoretic techniques, we have systematically and automatically provided a complete list of the dimension-eight operator basis in the standard model effective field theory, adopting a new form of operators based on the irreducible representations of the Lorentz group and identifying Lorentz structures as states in an SU(N) group. By ensuring the independence and permutation symmetries of the operators, our approach facilitates the handling of complexity arising from repeated fields. The explicit form of independent flavor-specified operators has been presented for the first time, and our algorithm can be easily applied to higher-dimensional standard model effective field theory and other effective field theories, making these studies more accessible.
Article
Astronomy & Astrophysics
Celine Degrande et al.
Summary: The study presents the automation of one-loop calculations in the standard model effective field theory at dimension 6, covering all types of operators and allowing for fully differential predictions. It focuses on the interactions of top-quark in the fermionic sector, demonstrating the potential for novel loop-induced and next-to-leading-order computations relevant for top-quark, electroweak, and Higgs-boson phenomenology at the LHC and future colliders.
Article
Astronomy & Astrophysics
Tie-Jiun Hou et al.
Summary: The new parton distribution functions (PDFs) from the CTEQ-TEA collaboration are determined using a wide variety of high-precision Large Hadron Collider (LHC) data, in addition to other datasets. These PDFs are analyzed at next-to-leading order and next-to-next-to-leading order, with error sets determined using the Hessian method. The data sensitivity and preference towards quantities such as α(s)(m(Z)), and the gluon and strange quark distributions are quantified using fast PDF survey techniques.
Article
Physics, Particles & Fields
Stefano Forte et al.
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Physics, Nuclear
Jacob J. Ethier et al.
Annual Review of Nuclear and Particle Science
(2020)
Article
Physics, Particles & Fields
Ferran Faura et al.
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Physics, Particles & Fields
Christopher W. Murphy
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Nathan P. Hartland et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Stefano Carrazza et al.
EUROPEAN PHYSICAL JOURNAL C
(2019)
Article
Physics, Multidisciplinary
Stefano Carrazza et al.
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Particles & Fields
Rabah Abdul Khalek et al.
EUROPEAN PHYSICAL JOURNAL C
(2019)
Review
Physics, Multidisciplinary
Ilaria Brivio et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2019)
Article
Astronomy & Astrophysics
Julien Baglio et al.
Article
Physics, Particles & Fields
V. Bertone et al.
EUROPEAN PHYSICAL JOURNAL C
(2018)
Article
Physics, Particles & Fields
R. Frederix et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Particles & Fields
Rabah Abdul Khalek et al.
EUROPEAN PHYSICAL JOURNAL C
(2018)
Article
Physics, Particles & Fields
Richard D. Ball et al.
EUROPEAN PHYSICAL JOURNAL C
(2017)
Article
Physics, Particles & Fields
Admir Greljo et al.
EUROPEAN PHYSICAL JOURNAL C
(2017)
Article
Astronomy & Astrophysics
Marco Farina et al.
Article
Astronomy & Astrophysics
Martin Gonzalez-Alonso et al.
Article
Astronomy & Astrophysics
S. Alekhin et al.
Article
Computer Science, Interdisciplinary Applications
Valerio Bertone et al.
COMPUTER PHYSICS COMMUNICATIONS
(2017)
Article
Astronomy & Astrophysics
S. Alekhin et al.
Article
Physics, Particles & Fields
Richard D. Ball et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Computer Science, Interdisciplinary Applications
Valerio Bertone et al.
COMPUTER PHYSICS COMMUNICATIONS
(2014)
Article
Physics, Particles & Fields
Elizabeth E. Jenkins et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2014)
Article
Physics, Particles & Fields
Richard D. Ball et al.
Article
Physics, Particles & Fields
Christophe Grojean et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2013)
Article
Physics, Particles & Fields
Elizabeth E. Jenkins et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2013)
Article
Physics, Particles & Fields
Richard D. Ball et al.
Article
Physics, Particles & Fields
Richard D. Ball et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2010)
Article
Physics, Particles & Fields
R Barbieri et al.
