Article
Astronomy & Astrophysics
Gautam Bhattacharyya, Siddharth Dwivedi, Dilip Kumar Ghosh, Gourab Saha, Subir Sarkar
Summary: In this study, we analyze the possibilities of discovering neutral exotic Higgs states in a model independent way, considering unconventional couplings with ordinary matter and gauge fields. We explore the discovery potential of these exotic Higgs states by utilizing their peculiar Yukawa and gauge properties.
Article
Astronomy & Astrophysics
Saiyad Ashanujjaman, Kirtiman Ghosh, Rameswar Sahu
Summary: The search for light doubly charged Higgs bosons, decaying into a pair of W bosons within the mass range of 84-200 GeV, has been challenging using conventional LHC searches. Recent research has shown that when these Higgs bosons are arranged in an SU(2)L triplet with slightly heavier singly-charged and neutral Higgs bosons, they can accommodate the recent measurement of the W boson mass by the CDF Collaboration. In a highly Lorentz-boosted regime, they tend to manifest as a single fat jet or a pair of adjacent same-sign leptons plus missing transverse momentum. A multivariate analysis is performed to distinguish these exotic jets from standard model jets, followed by a novel search in the final state with an exotic jet and two same-sign leptons plus missing transverse momentum using the already collected Run 2 LHC data.
Article
Multidisciplinary Sciences
Howard Baer, Vernon Barger, Xerxes Tata, Kairui Zhang
Summary: This study examines the production and decay of heavy neutral SUSY Higgs bosons in different supersymmetry scenarios, utilizing a combination of back-to-back and acollinear mass peak techniques for signal channels. The evaluation includes exclusion and discovery limits at the LHC, compared to results from a statistical analysis of the string landscape.
Article
Multidisciplinary Sciences
Howard Baer, Vernon Barger, Xerxes Tata, Kairui Zhang
Summary: In SUSY models with low electroweak naturalness, higgsinos are expected at few hundred GeV scale while electroweak gauginos are at the TeV scale. For heavy neutral SUSY Higgs bosons H and A at TeV scale, the dominant decay modes are gaugino plus higgsino. We explore the possibility of H, A -> W+E/T, Z+E/T and h+E/T signatures at the HL-LHC, considering the large SM backgrounds and investigate if the presence of additional soft leptons from the decays of light higgsinos can enhance these signal channels over backgrounds. We find significant regions in the mA vs. tan beta plane around 1-2 TeV which can be probed at the HL-LHC with these dominant signatures at 5 sigma and the 95% CL.
Article
Materials Science, Multidisciplinary
Marwa Telba, Maien Binjonaid
Summary: This paper investigates the impact of recent LHC constraints on the Higgs sector in the semi-constrained version of the Next-to-Minimal Supersymmetric Standard Model, focusing on the parameter space where the Higgs doublet-singlet coupling and the ratio between the vacuum expectation values of the two Higgs doublets are at extreme values. The analysis presents possible fermionic decay channels and reduced cross-sections for the lightest neutral Higgs bosons in the NMSSM, showing high branching ratios for non SM-like Higgs into bottom quarks at lower Higgs masses. Moreover, it is found that the branching ratio of h(2)/a(1) -> t (t) over bar can reach unity for all mass ranges when these bosons are mostly singlet.
RESULTS IN PHYSICS
(2021)
Article
Multidisciplinary Sciences
Arnaud Ferrari, Nikolaos Rompotis
Summary: This review article summarizes the current state-of-the-art experimental results obtained recently in the search for new neutral and charged Higgs bosons, utilizing a partial or full Run-2 dataset.
Review
Multidisciplinary Sciences
Elizabeth Brost, Luca Cadamuro
Summary: The production of pairs of Higgs bosons provides insights into the properties of the scalar sector of the standard model and has implications for the origin and evolution of the Universe. It also serves as a platform for searching for yet-unknown physics beyond the standard model. This review article summarizes current searches for Higgs boson pairs and discusses the implications and prospects for future studies.
Article
Physics, Particles & Fields
Ezio Maina, Giovanni Pelliccioli
Summary: Investigating the polarization of weak bosons in the decay of Higgs bosons provides important insights into the scalar and gauge sector of the Standard Model, and has potential for extensions to higher orders in perturbation theory.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
M. Krab, M. Ouchemhou, A. Arhrib, R. Benbrik, B. Manaut, Qi-Shu Yan
Summary: A search for charged Higgs at LHC could provide clear evidence of new physics beyond the Standard Model. In this study, we investigate the production channels of charged Higgs through pp -> H +/- W -/+ and pp -> H +/- bj in the Two-Higgs Doublet Model. By examining the decay channels of H +/- -> W +/- hi/A, specifically focusing on bb over line, Tau Tau and gamma gamma decays of hi and A, we find that these signatures can have significant rates at low tan beta under certain conditions. We propose the bb, Tau Tau, and gamma gamma final states associated with WW or Wbj as a promising experimental approach to complement the search for a charged Higgs boson at LHC.
Article
Astronomy & Astrophysics
N. Darvishi, M. R. Masouminia
Summary: In this study, the maximally symmetric two-Higgs doublet model (MS-2HDM) is used to investigate the signature at LHC, showing that the production of Higgs bosons through various processes aligns with the Standard Model. The presence of heavy Higgs states significantly enhances the cross section for specific production channels, indicating potential for future discoveries of this predictive extension.
Article
Astronomy & Astrophysics
Tao Han, Shuailong Li, Shufang Su, Wei Su, Yongcheng Wu
Summary: The study focused on the discovery potential and discrimination power of non-Standard Model (SM) heavy Higgs bosons in the Two-Higgs-Doublet Models (2HDMs) at a multi-TeV muon collider. It was found that pair production through universal gauge interactions is dominant, with single Higgs boson production associated with heavy fermions being important in certain parameter regions. Different types of 2HDMs can be distinguishable for moderate and large values of tan beta, extending the kinematic reach of the heavy Higgs boson mass to the collider energy.
Article
Physics, Particles & Fields
T. Biekoetter, A. Grohsjean, S. Heinemeyer, C. Schwanenberger, G. Weiglein
Summary: Several searches at the LHC have observed local signal excesses at around 400 GeV in the channels of t(t) over bar and tau (+)tau(-). This study investigates the compatibility of these signals with the Next-to-Two-Higgs-Doublet Model (N2HDM) or the Next-to Minimal Supersymmetric Standard Model (NMSSM). The analysis reveals that the signals in the t(t) over bar and tau (+)tau(-) channels point towards different regions of the parameter space, and an additional Higgs boson at around 96 GeV could also be accommodated. In the context of the NMSSM, a confirmation of a signal in the tt final state would support the alignment-without-decoupling limit of the model.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Review
Physics, Multidisciplinary
A. Gurtu
Summary: The Indian engagement with CERN can be traced back to the early days of the organization, with Indian groups participating in experiments during the 1960s, 70s, and 80s. In the 1990s, funding agencies in India collaborated to ensure a comprehensive Indian participation in the LHC project, with multiple physics groups and institutions contributing towards its construction.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Astronomy & Astrophysics
Avik Banerjee, Sayan Dasgupta, Tirtha Sankar Ray
Summary: Researchers suggest that the Higgs boson may be a composite scalar with a finite extension in space, showing its characteristics in the kinematic distributions at the LHC. By constructing momentum-dependent form factors to capture the interactions of the composite Higgs with the weak gauge bosons, they demonstrate the impact in the differential distributions of various kinematic parameters for the pp -> Z*H -> l+l-bb channel, providing an important handle to probe the Higgs' substructure at the HL-LHC.
Article
Physics, Multidisciplinary
Hai Tao Li, Bin Yan, C. -P. Yuan
Summary: Distinguishing between Higgs production mechanisms using the jet charge asymmetry of the two leading forward jets in Higgs plus two jets production can help constrain the couplings of Higgs to gauge bosons. This method provides a way to differentiate the W fusion, Z fusion, and gluon fusion processes, shedding light on the underlying physics processes.
PHYSICAL REVIEW LETTERS
(2023)
