Article
Physics, Nuclear
Vincenzo Cirigliano, Kaori Fuyuto, Michael J. Ramsey-Musolf, Evan Rule
Summary: In this study, we estimate the lepton flavor violation induced by scalar particle exchanges in a specific class of models, and correct some previous incorrect results. We find that next-to-leading order (NLO) contributions affect the amplitudes at the level of 10%, which could be larger than the uncertainty on the leading order couplings. Furthermore, we study the implications of our results for testing Higgs-mediated charged lepton flavor violation (CLFV) by combining results from various experimental searches.
Article
Physics, Multidisciplinary
Gang Li, Michael J. Ramsey-Musolf, Juan Carlos Vasquez
Summary: The study indicates that LR mixing has a significant impact on the 0 nu beta beta decay rate, possibly dominating the decay process, with the long-range pion exchange contribution being more significant than the short-range contribution.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
V. M. Braun, Yao Ji, Jakob Schoenleber
Summary: Deeply virtual Compton scattering provides information on the transverse position and longitudinal momentum of quarks and gluons in the proton through the generalized parton distributions. We have calculated the two-loop, next-to-next-to-leading order (NNLO) coefficient functions of deeply virtual Compton scattering associated with the dominant Compton form factors H and epsilon at high energies, in anticipation of high-precision experimental data from the Electron-Ion Collider. The NNLO correction to the imaginary part of H is found to be rather large for simple generalized parton distribution models, up to a factor of 2 at the input scale Q(2) = 4 GeV2, due to a cancellation between quark and gluon contributions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Hao-Yu Liu, Xiaohui Liu, Sven-Olaf Moch
Summary: Jets constructed via clustering algorithms have been proposed for precision measurements, but missing QCD corrections at higher orders for the jet functions affect the theoretical accuracy. This work presents a method to evaluate jet functions at higher orders in QCD, involving phase space sector decomposition with suitable soft subtractions. A concrete example is given for the quark-jet function using the anti-kT algorithm with E-scheme recombination at next-to-next-to-leading order.
Article
Astronomy & Astrophysics
Loic Fernandez, Jean-Loic Kneur
Summary: The investigation of renormalization group optimized perturbation theory (RGOPT) at NNLO for thermal scalar field theory demonstrates efficient resummation and excellent convergence properties, significantly improving the renormalization scale dependence of thermodynamical quantities compared to standard perturbative expansions and other resummation methods. These results provide a useful first NNLO illustration for potential applications of this approach to more complex thermal QCD.
Article
Astronomy & Astrophysics
Rabah Abdul Khalek, Valerio Bertone, Alice Khoudli, Emanuele R. Nocera
Summary: We present a new determination method for the unpolarised charged pion and kaon fragmentation functions based on single-inclusive electron-positron annihilation and lepton-nucleon semi-inclusive deep-inelastic scattering data. The method includes next-to-next-to-leading order QCD corrections and combines a neural-network parametrisation of fragmentation functions with a Monte Carlo representation of their uncertainties. We discuss the quality of the determination and its dependence on higher order corrections.
Article
Physics, Multidisciplinary
Roman N. Lee, Matthew D. Schwartz, Xiaoyuan Zhang
Summary: An analytic formula is provided for the total scattering cross section of an electron and a photon at order alpha(3) in QED, including both real-emission and virtual Compton scattering contributions. When combined with the recent analytic result for the pair-production cross section, the complete alpha(3) cross section is determined. Modern multiloop calculation techniques are used to compute the next-to-leading order calculation and pair-production cross section.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yong Du, Ayres Freitas, Hiren H. Patel, Michael J. Ramsey-Musolf
Summary: This study presents a complete, gauge-invariant computation of two-loop virtual corrections involving closed fermion loops to the polarized Moller scattering asymmetry. The contributions from two closed fermion loops and one closed fermion loop are numerically similar in magnitude to the one-loop bosonic corrections, resulting in an overall correction of 1.3% relative to the tree level asymmetry. The authors estimate the sizes of the remaining two-loop contributions and discuss implications for the upcoming MOLLER experiment.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Michal Czakon, Alexander Mitov, Rene Poncelet
Summary: This study utilizes multijet rates to explore quantum chromodynamics (QCD), calculating NNLO QCD corrections for three-jet observables and three-to-two jet ratios. It demonstrates a significant reduction in the dependence of these observables on factorization and renormalization scales. This proof-of-principle computation represents a milestone in perturbative QCD.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Rui-Qing Meng, Sheng-Quan Wang, Ting Sun, Chao-Qin Luo, Jian-Ming Shen, Xing-Gang Wu
Summary: This study applies the Principle of Maximum Conformality (PMC) to analyze the top-quark decay at NNLO in QCD, eliminating renormalization scheme and scale ambiguities. The PMC scale Q(star) is determined to be 15.5 GeV, an order of magnitude smaller than the conventional choice mu(r) = m(t), indicating the small virtuality of the QCD dynamics in top-quark decay. Removal of non-conformal beta terms in the pQCD series avoids renormalon divergence, resulting in a significant increase in NLO QCD correction and suppression of NNLO QCD correction compared to conventional results obtained at mu(r) = m(t). Including NLO electroweak corrections, finite W boson width, and finite bottom quark mass, the top-quark total decay width Gamma(tot)(t) is obtained as 1.3112(-0.0189)(+0.0190) GeV.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
O. Grocholski, B. Pire, P. Sznajder, L. Szymanowski, J. Wagner
Summary: This study focuses on diphoton exclusive photoproduction in the kinematics where collinear QCD factorization framework applies. The results show that the predictions for cross sections are sensitive to various models of generalized parton distributions (GPDs). Despite the large and negative NLO corrections, the reaction studied remains a promising tool for extracting C-odd GPDs.
Article
Physics, Particles & Fields
Long-Bin Chen, Liang Dong, Hai Tao Li, Zhao Li, Jian Wang, Yefan Wang
Summary: We analytically calculate the one-loop squared amplitudes for tW production at a hadron collider using the differential equations method. After renormalization, we verify that the infrared divergences align with the predicted general structure based on anomalous dimensions. The finite remainder contributes to the next-to-next-to-leading order hard function, an important gradient in the factorization formula of the cross section near the infrared region, which can be utilized for all-order resummation of soft gluon effects or a differential next-to-next-to-leading order calculation based on the phase space slicing method.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Andreas Ekstedt, Oliver Gould, Johan Lofgren
Summary: We develop new perturbative tools to accurately study radiatively induced first-order phase transitions. By employing a consistent power counting scheme, we resolve previous issues and show that the infamous Linde problem is not as significant in these calculations as previously thought.
Article
Astronomy & Astrophysics
O. Grocholski, B. Pire, P. Sznajder, L. Szymanowski, J. Wagner
Summary: This study calculates the amplitude for the photoproduction of a near forward large mass diphoton at leading twist and next to leading order in the framework of collinear factorization. The validity of factorization at this order is demonstrated, with the NLO result probing the whole domain of definition of quark GPDs with both real and imaginary parts. Phenomenology of the results for medium (JLab) and higher energy (EIC) experiments will be developed in future studies.
Article
Physics, Multidisciplinary
Ignacio Borsa, Rodolfo Sassot, Daniel de Florian, Marco Stratmann, Werner Vogelsang
Summary: In this study, we perform a global QCD analysis of parton-to-pion fragmentation functions at NNLO accuracy and fit the data from single-inclusive electron-positron annihilation and semi-inclusive deep-inelastic scattering multiplicity. We investigate the impact of NNLO corrections on the description of the data and resulting pion fragmentation functions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Emmanuel Chang, William Detmold, Kostas Orginos, Assumpta Parreno, Martin J. Savage, Brian C. Tiburzi, Silas R. Beane
Article
Astronomy & Astrophysics
Brian C. Tiburzi
Article
Physics, Multidisciplinary
Silas R. Beane, Emmanuel Chang, William Detmold, Kostas Orginos, Assumpta Parreo, Martin J. Savage, Brian C. Tiburzi
PHYSICAL REVIEW LETTERS
(2015)
Article
Physics, Multidisciplinary
William Detmold, Kostas Orginos, Assumpta Parreno, Martin J. Savage, Brian C. Tiburzi, Silas R. Beane, Emmanuel Chang
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
Michael G. Endres, Andrea Shindler, Brian C. Tiburzi, Andre Walker-Loud
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
Martin J. Savage, Phiala E. Shanahan, Brian C. Tiburzi, Michael L. Wagman, Frank Winter, Silas R. Beane, Emmanuel Chang, Zohreh Davoudi, William Detmold, Kostas Orginos
PHYSICAL REVIEW LETTERS
(2017)
Article
Physics, Multidisciplinary
Phiala E. Shanahan, Brian C. Tiburzi, Michael L. Wagman, Frank Winter, Emmanuel Chang, Zohreh Davoudi, William Detmold, Kostas Orginos, Martin J. Savage
PHYSICAL REVIEW LETTERS
(2017)
Article
Astronomy & Astrophysics
Brian C. Tiburzi
Article
Astronomy & Astrophysics
Jong-Wan Lee, Brian C. Tiburzi
Article
Astronomy & Astrophysics
Amol Deshmukh, Brian C. Tiburzi
Article
Astronomy & Astrophysics
Brian C. Tiburzi, Michael L. Wagman, Frank Winter, Emmanuel Chang, Zohreh Davoudi, William Detmold, Kostas Orginos, Martin J. Savage, Phiala E. Shanahan
Article
Astronomy & Astrophysics
Brian C. Tiburzi, Gaurav Verma
Article
Astronomy & Astrophysics
Matthew E. Matzelle, Brian C. Tiburzi
Article
Astronomy & Astrophysics
Matthew E. Matzelle, Brian C. Tiburzi
Article
Astronomy & Astrophysics
Jong-Wan Lee, Brian C. Tiburzi