Article
Astronomy & Astrophysics
Anisha, Upalaparna Banerjee, Joydeep Chakrabortty, Christoph Englert, Michael Spannowsky
Summary: The study investigates the effects of charged scalar extensions in the Higgs sector of the Standard Model, as well as the EFT couplings of this new state to SM matter. It shows that loop-induced decays of the 125 GeV Higgs boson can clarify the additional states phenomenology. EFT interactions of the charged Higgs can lead to a decreased sensitivity to the virtual presence of charged Higgs states.
Article
Astronomy & Astrophysics
Guoxing Wang, Yuxuan Wang, Xiaofeng Xu, Yongqi Xu, Li Lin Yang
Summary: This paper presents a precise and efficient computation method based on the small-Higgs-mass expansion for the two-loop amplitudes of Higgs boson pair production via gluon fusion. The results are compared to up-to-date predictions, showing precision numeric predictions in the entire phase space and high computational efficiency. This method is valuable for practical phenomenological studies and can be applied to similar processes.
Article
Astronomy & Astrophysics
Jorge de Blas, Jiayin Gu, Zhen Liu
Summary: A study on the precision measurement of the Higgs boson at a 125 GeV muon collider is conducted, providing significant improvement and independent precision information on the Higgs coupling for future e+e- colliders.
Article
Physics, Particles & Fields
A. Garcia-Abenza, J. M. No
Summary: High-energy gamma gamma colliders have the potential to probe dark sectors and the parameter space of the Higgs portal with precision comparable to other planned collider facilities.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Matteo Becchetti, Roberto Bonciani, Vittorio Del Duca, Valentin Hirschi, Francesco Moriello, Armin Schweitzer
Summary: This study presents the exact next-to-leading-order QCD corrections to the light-quark part of the mixed QCD-EW contributions to Higgs production via gluon fusion at the Large Hadron Collider for a center-of-mass energy of 13 TeV. The choice of renormalization and factorization scales has a significant impact on the final result.
Article
Astronomy & Astrophysics
Oliver Atkinson, Christoph Englert, Panagiotis Stylianou
Summary: The study discusses the phenomenological relevance of signal-signal and signal-background interference effects for decay chains, highlighting the potential of asymmetric cascade decays in models of scalar extensions of the SM Higgs sector. Additionally, characteristic interference patterns can serve as a powerful tool for indirect CP spectroscopy of BSM sectors if discoveries are made in the future, motivating associated searches at present and future colliders for robust discovery of new physics and reconstruction of the underlying UV electroweak potential.
Article
Physics, Particles & Fields
Wolfgang Kilian, Sichun Sun, Qi-Shu Yan, Xiaoran Zhao, Zhijie Zhao
Summary: This study investigates the observability of new interactions affecting Higgs-pair production at the LHC and future proton-proton colliders. By tagging boosted Higgs bosons, projected bounds for the operator coefficient at different colliders are determined, taking into account unitarity constraints. The discovery potential for new physics in Higgs pair production in this channel is estimated.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Mads T. Frandsen, Martin Rosenlyst
Summary: We study constraints on Composite Higgs models with fermion partial compositeness from electroweak precision measurements, including the 2022 W-boson mass result from the CDF collaboration. We find good agreement between the full composite models and the current electroweak precision measurement bounds on S and T from LEP and CDF, including the offset and correlation of S, T with respect to the SM predictions.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Philip Bechtle, Sven Heinemeyer, Tobias Klingl, Tim Stefaniak, Georg Weiglein, Jonas Wittbrodt
Summary: HiggsSignals is a program that confronts model predictions with available Higgs signal rate and mass measurements, resulting in likelihood estimates. The new version, HiggsSignals-2, includes improvements in handling template cross section measurements and statistical interpretations. The performance of HiggsSignals is illustrated with example analyses, highlighting the importance of public information on experimental details.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Arnd Behring, Federico Buccioni, Fabrizio Caola, Maximilian Delto, Matthieu Jaquier, Kirill Melnikov, Raoul Rontsch
Summary: Mixed QCD-electroweak corrections to fully differential production of an on-shell W boson, including decays of W bosons to lepton pairs in the leading order approximation, are computed analytically for arbitrary electroweak gauge boson masses. Analytic results for integrated subtraction terms are obtained within a soft-collinear subtraction scheme tailored to handle the structural simplicity of infrared singularities of mixed QCD-electroweak contributions, with numerical results presented for mixed corrections to the fiducial cross section of pp -> W+ -> l(+)nu and selected kinematic distributions in this process.
Article
Multidisciplinary Sciences
Bartosz Dziewit, Magdalena Kordiaczynska, Tripurari Srivastava
Summary: A study was conducted on an extension of the Standard Model with an additional triplet of scalar bosons and a total of four Higgs bosons. The analysis focused on the associated production of a doubly charged scalar with Standard Model gauge bosons and other Higgs bosons. Promising processes involving a single produced doubly charged Higgs boson were estimated in the context of present and future hadron colliders.
Article
Physics, Particles & Fields
Matthew Forslund, Patrick Meade
Summary: Studies show that future muon colliders can achieve high precision detection of Higgs properties through accurate background analysis and fast detector simulation. Meanwhile, muon colliders complement the LHC and e(+)e(-) Higgs factories.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Oliver Atkinson, Matthew Black, Christoph Englert, Alexander Lenz, Aleksey Rusov
Summary: This work contrasts the high precision achievable within the MUonE experiment with constraints from flavor physics, precision electroweak constraints, and LHC searches for two Higgs doublet models. The study finds that MUonE's sensitivity does not extend beyond the parameter regions already excluded by other constraints. MUonE will provide a detailed measurement of the hadronic vacuum polarization contribution, informing interpretations of the anomalous magnetic moment in 2HDMs without modifications from beyond the Standard Model interactions.
Article
Physics, Particles & Fields
Georgios K. Karananas, Mikhail Shaposhnikov, Sebastian Zell
Summary: In this paper, we investigate the cutoff energy scale at which perturbation theory breaks down in inflation driven by the Higgs field coupled non-minimally to gravity. Using the metric formulation, we present a new method to calculate a lower bound on the cutoff, which does not rely on a gauge choice or require amplitude calculations. Instead, we exploit the invariance of the S-matrix under field redefinitions. Consistent with previous findings, we demonstrate that the cutoff during inflation is significantly higher than in vacuum, ensuring the reliability of semiclassical predictions. Additionally, we generalize our results to the Palatini formulation and discuss a useful parameterization of the Higgs doublet in both scenarios.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Kodai Sakurai, Wen Yin
Summary: The paper investigates the Higgs portal interaction with a singlet sector of the standard model (SM) gauge group. It shows that a quantum effect plays a crucial role when the Higgs field mixes with another singlet scalar field with a higher decay rate than the mass difference between the mass eigenstates. The research finds that the mixed mass eigenstates can mimic the 125 GeV Higgs boson, which is important for further understanding the Higgs mechanism.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Review
Physics, Multidisciplinary
Sebastian Mizera
Summary: This article discusses the mathematical properties and physical implications of scattering amplitudes, and traces these properties back to physics through simple scattering problems.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2024)
