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
Astronomy & Astrophysics
Alexander Belyaev, Stefan Prestel, Felipe Rojas-Abatte, Jose Zurita
Summary: This study reinterprets the latest ATLAS disappearing track search for a range of dark matter multiplets with different spins and electroweak quantum numbers, finding that the disappearing track signature can probe a vast portion of the parameter space. The results provide upper limits on the cross section and efficiencies in the lifetime-dark matter mass plane for all considered models, demonstrating the potential for easy recasting for similar classes of models. The recasting code employed in the study is also provided as part of the public LLP recasting repository.
Article
Astronomy & Astrophysics
Simone Amoroso, Mauro Chiesa, Clara Lavinia Del Pio, Katerina Lipka, Fulvio Piccinini, Federico Vazzoler, Alessandro Vicini
Summary: Measurements of neutral current Drell-Yan production at large invariant dilepton masses are used to test the energy scale dependence of the electroweak mixing angle. A novel implementation of the full next-to-leading order electroweak radiative corrections to the Drell-Yan process is used, exploring the potential of future analyses using proton-proton collisions at & RADIC;s = 13.6 TeV. The Standard Model predictions for the MS running at TeV scales can be probed.
Article
Physics, Particles & Fields
Jeremy Andrea, Daniel Bloch, Eric Conte, Douja Darej, Robin Ducrocq, Emery Nibigira
Summary: In the paper, the relevance of using top quarks produced from new long-lived particles and detected in the tracker volume of the ATLAS and CMS experiments is investigated in the context of prospective studies for searches of new physics at the LHC Run 3. The authors study a signature called displaced top quarks, which lead to final states containing displaced vertices and a high multiplicity of displaced jets and tracks. Three simplified models based on supersymmetry are designed for the study and promising benchmarks are defined and experimental guidelines are suggested.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Partha Konar, Biswarup Mukhopadhyaya, Rafiqul Rahaman, Ritesh K. Singh
Summary: This study investigates the modification factor alpha(b) in the b(b) over bar -associated production of the 125-GeV scalar at the high-luminosity LHC, utilizing a gradient boosting algorithm to improve statistical significance. The research shows the possibility of probing down to alpha(b) = 3 with more than 5 sigma significance at L = 3000 fb(-1) and root s= 13 TeV, with a reported achievable limit at 95% C.L. of +/- 1.95, and also discusses the scale dependence of this limit.
Article
Astronomy & Astrophysics
Andres Florez, Tomas Atehortua Garces, Jose D. Ruiz-Alvarez
Summary: The R-D(*) anomaly is a fascinating experimental result in particle physics that challenges the Standard Model. Several extensions of the SM, including heavy W0 bosons, leptoquarks with preferential couplings, and effective field theories, are studied to explain this tension. Feasibility studies are conducted at the LHC to explore each scenario, considering specific final states and optimized selection criteria. Different LHC running conditions and luminosities are taken into account.
Article
Astronomy & Astrophysics
Monoranjan Guchait, Arnab Roy, Seema Sharma
Summary: This study explores the possibility of the lightest neutralino as a dark matter candidate, finding that a mild-tempered mixed neutralino may be suitable as dark matter and re-examining the parameter space that satisfies all constraints. Additionally, through experiments at the LHC, investigations into the neutralino scenario were conducted, revealing that the channel is also highly sensitive to blind spot scenarios.
Article
Astronomy & Astrophysics
Sunghoon Jung, Zhen Liu, Lian-Tao Wang, Ke-Pan Xie
Summary: We study the tagging of Higgs exotic decay signals using different types of deep neural networks, finding that the particle flow network (PFN) achieves the best performance. We verify that the PFN can serve as an efficient tagger even when trained on a different event topology and b multiplicity.
Article
Astronomy & Astrophysics
Ke-Pan Xie, Bin Yan
Summary: The coupling relative sign between hWW and hZZ can be fully determined through experiments at the LHC involving single top quark and Higgs associated production, as well as Zh production.
Article
Astronomy & Astrophysics
Mayumi Aoki, Shinya Kanemura, Michihisa Takeuchi, Lalu Zamakhsyari
Summary: In this study, the chirality structure in lepton-flavor-violating Higgs decays h -> τμ at the LHC was investigated using a phenomenological approach. The effects of τ polarization and the importance of determining the relative visible momentum ratio x were estimated, and an appropriate analysis was conducted assuming one missing particle with a collinear mass mcol1. The results showed that the sensitivity could be affected by +/- 4-6% in terms of the upper bound for BR(h -> τμ), and the bounds on the (IyμτI; IyτμI) plane were altered accordingly. Benchmark scenarios were also studied, and the sensitivity of the chirality structure was demonstrated using the relative visible momentum ratio. It was found that the two fully polarized cases, τR and τL, which are consistent with the recently reported excess, can be distinguished at a 2σ level for 1000 fb-1. Furthermore, it was shown that an improved study with 139 fb-1 could potentially provide similar sensitivity.
Article
Mathematics, Interdisciplinary Applications
Shuo Li, Imam Bukhsh, Ihsan Ullah Khan, Muhammad Imran Asjad, Sayed M. Eldin, Magda Abd El-Rahman, Dumitru Baleanu
Summary: This study describes and analyzes a nonlinear Susceptible-Infected (S•I) type mathematical model for HIV/AIDS, assuming timely Anti Retroviral Therapy (ART) can reduce disease spread and extend patients' lives. The dynamics of the model are investigated using standard finite difference and nonstandard finite difference schemes. The results of this study can be used as an effective tool for forecasting the progression of HIV/AIDS epidemic diseases.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Physics, Particles & Fields
Ibrahima Bah, Federico Bonetti, Enoch Leung, Peter Weck
Summary: In this paper, the global symmetries and anomalies of 4d N = 1 field theories arising from a stack of N M5-branes probing a class of flux backgrounds are analyzed. The setup defines a non-trivial superconformal field theory (SCFT) in the IR for k = 2, with a holographic dual to an explicit AdS(5) solution. By adopting anomaly inflow methods, the groundwork for a systematic analysis of the generalization to k >= 3 is laid out in this study.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Nuclear
Timo J. Karkkainen, Zoltan Trocsanyi
Summary: The article discusses the super-weak force model and its neutrino-related components, studying the parameter space of the neutrino Yukawa matrices and mixing matrix elements. The model provides benchmark points in the sensitivity region of SHiP and MATHUSLA experiments.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Murat Abdughani, Daohan Wang, Lei Wu, Jin Min Yang, Jun Zhao
Summary: The study uses a message passing neural network to investigate the nonresonant Higgs pair production process at the LHC, finding it challenging to observe such a process. By imposing an upper limit on the production cross section of the Higgs pair, the study limits the triple Higgs boson coupling to a specific range.
Article
Physics, Particles & Fields
Amit Adhikary, Nabarun Chakrabarty, Indrani Chakraborty, Jayita Lahiri
Summary: The study focuses on probing the strength of H(+/-)W(-/+)Z interaction in new physics models at a 27 TeV proton-proton collider, finding that the H-+/- jj production process has a greater reach compared to ZH(+/-), and the discovery potential of a charged Higgs improves markedly with respect to lower centre-of-mass energies. The results are also discussed in the context of the popular Georgi-Machacek model.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Kaustubh Agashe, Peizhi Du, Majid Ekhterachian, Chee Sheng Fong, Sungwoo Hong, Luca Vecchi
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Geography, Physical
Ian M. Shoemaker, Alexander Kusenko, Peter Kuipers Munneke, Andrew Romero-Wolf, Dustin M. Schroeder, Martin J. Siegert
ANNALS OF GLACIOLOGY
(2020)
Article
Physics, Multidisciplinary
Gabriel Cuomo, Luca Vecchi, Andrea Wulzer
Article
Physics, Multidisciplinary
Vedran Brdar, Bhaskar Dutta, Wooyoung Jang, Doojin Kim, Ian M. Shoemaker, Zahra Tabrizi, Adrian Thompson, Jaehoon Yu
Summary: Future neutrino experiments like DUNE show competitive sensitivity to axionlike particles (ALPs), allowing for the exploration of a wide range of parameter space in ALP-photon coupling. The detectors can effectively distinguish ALP signals from potential backgrounds, improving signal sensitivity and reaching sensitivity limits up to certain ALP masses and coupling strengths.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Alessandro Valenti, Luca Vecchi
Summary: In this study, we analyze the Nelson-Barr approach to the Strong CP Problem, derive necessary conditions for reproducing the CKM phase and quark masses, and quantify irreducible contributions to the QCD topological angle. We discuss collider, electroweak, and flavor bounds, and find that most of the parameter space above the TeV scale is still allowed in models with down-type mediators.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Alessandro Valenti, Luca Vecchi
Summary: The solution of the Strong CP Problem is based on the spontaneous breaking of CP, requiring a non-generic structure to explain a coincidence between CP-even and CP-odd mass scales. This approach, utilizing gauge invariance and a CP-conserving physics at the Planck scale, predicts a dark sector with potential cosmological signatures.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Luca Vecchi
Summary: Composite axion scenarios provide a theoretical basis for the high-quality existence of the Peccei-Quinn symmetry, naturally embedded in Grand-Unified Theories, and leading to distinctive signatures at low energies, such as additional composite scalars and approximate unification of Standard Model gauge couplings.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Alessandro Valenti, Luca Vecchi, Ling-Xiao Xu
Summary: We propose a model that addresses the strong CP problem by introducing a heavier axion than the standard one. In this model, the quarks of the Standard Model are embedded into a larger non-abelian Grand Color group that splits into ordinary QCD and additional confining dynamics. The model has a minimal field content and can be tested through collider experiments and cosmological observations.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Ian M. Shoemaker, Yu-Dai Tsai, Jason Wyenberg
Summary: In this paper, researchers found that a magnetic transition dipole moment between tau and sterile neutrinos can account for the XENON1T excess events. Moreover, they set new constraints on the dipole portal based on the Xenon 1T data. The best fit parameter space for sterile neutrinos may have significant effects on big bang nucleosynthesis (BBN).
Article
Astronomy & Astrophysics
James B. Dent, Bhaskar Dutta, Jayden L. Newstead, Alejandro Rodriguez, Ian M. Shoemaker, Zahra Tabrizi, Natalia Tapia Arellano
Summary: The study shows that cosmic ray electron scattering on background ALPs can produce photon signals, leading to new competitive constraints on ALP-electron coupling. Future e-Astrogram bounds will have higher sensitivity to ALP-CR induced gamma-rays.
Article
Astronomy & Astrophysics
James B. Dent, Bhaskar Dutta, Jayden L. Newstead, Ian M. Shoemaker, Natalia Tapia Arellano
Summary: This paper examines the potential of scattering on high-energy cosmic-ray electrons to accelerate nonrelativistic dark matter and expand experimental reach for direct detection. Current data from Super-Kamiokande and XENON1T already provide constraints on dark matter flux, with future projections for DUNE surpassing Super-K bounds.
Article
Astronomy & Astrophysics
Nicholas Hurtado, Hana Mir, Ian M. Shoemaker, Eli Welch, Jason Wyenberg
Article
Astronomy & Astrophysics
James B. Dent, Bhaskar Dutta, Jayden L. Newstead, Ian M. Shoemaker
Article
Astronomy & Astrophysics
Ian M. Shoemaker, Jason Wyenberg
Article
Astronomy & Astrophysics
John F. Cherry, Ian M. Shoemaker
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
