Article
Astronomy & Astrophysics
Chih-Ting Lu, Lei Wu, Yongcheng Wu, Bin Zhu
Summary: The measured W boson mass deviates significantly from the prediction of the Standard Model, indicating the presence of nondegenerate multiplets beyond the Standard Model. By performing a global electroweak fit with the new W boson, new values of the oblique parameters are obtained, which can be accommodated in the two-Higgs doublet model.
Article
Astronomy & Astrophysics
Fabio D'Ambrosio, Shaun D. B. Fell, Lavinia Heisenberg, Simon Kuhn
Summary: The field equations of f(Q) gravity for spherically symmetric and stationary metric-affine spacetimes were systematically studied, showing that beyond-GR solutions are possible contrary to previous claims. Specific criteria were formulated to determine conditions under which GR solutions or beyond-GR solutions are obtainable. Perturbative corrections to the Schwarzschild solution were made for various choices of f(Q), including a dynamical affine connection, and an exact beyond-GR vacuum solution was presented. The method was also applied to f(T) gravity for similar solutions without a dynamical connection.
Article
Astronomy & Astrophysics
Andrea Caputo, Georg Raffelt, Edoardo Vitagliano
Summary: This research focuses on deriving supernova bounds on muon-philic bosons, considering factors like scalar phi and pseudoscalar a, as well as the generic two-photon coupling implied by a muon triangle loop. The results show that SN arguments become interesting mainly for larger boson masses, and constraints are derived based on SN 1987A gamma rays and the diffuse cosmic gamma-ray background. The study also discusses the implications on boson emission in different scenarios like escaping freely from the SN core or being in the trapping regime.
Review
Physics, Particles & Fields
K. G. Arun, Enis Belgacem, Robert Benkel, Laura Bernard, Emanuele Berti, Gianfranco Bertone, Marc Besancon, Diego Blas, Christian G. Bohmer, Richard Brito, Gianluca Calcagni, Alejandro Cardenas-Avendano, Katy Clough, Marco Crisostomi, Valerio De Luca, Daniela Doneva, Stephanie Escoffier, Jose Maria Ezquiaga, Pedro G. Ferreira, Pierre Fleury, Stefano Foffa, Gabriele Franciolini, Noemi Frusciante, Juan Garcia-Bellido, Carlos Herdeiro, Thomas Hertog, Tanja Hinderer, Philippe Jetzer, Lucas Lombriser, Elisa Maggio, Michele Maggiore, Michele Mancarella, Andrea Maselli, Sourabh Nampalliwar, David Nichols, Maria Okounkova, Paolo Pani, Vasileios Paschalidis, Alvise Raccanelli, Lisa Randall, Sebastien Renaux-Petel, Antonio Riotto, Milton Ruiz, Alexander Saffer, Mairi Sakellariadou, Ippocratis D. Saltas, B. S. Sathyaprakash, Lijing Shao, Carlos F. Sopuerta, Thomas P. Sotiriou, Nikolaos Stergioulas, Nicola Tamanini, Filippo Vernizzi, Helvi Witek, Kinwah Wu, Kent Yagi, Stoytcho Yazadjiev, Nicolas Yunes, Miguel Zilhao, Niayesh Afshordi, Marie-Christine Angonin, Vishal Baibhav, Enrico Barausse, Tiago Barreiro, Nicola Bartolo, Nicola Bellomo, Ido Ben-Dayan, Eric A. Bergshoeff, Sebastiano Bernuzzi, Daniele Bertacca, Swetha Bhagwat, Beatrice Bonga, Lior M. Burko, Geoffrey Compere, Giulia Cusin, Antonio da Silva, Saurya Das, Claudia de Rham, Kyriakos Destounis, Ema Dimastrogiovanni, Francisco Duque, Richard Easther, Hontas Farmer, Matteo Fasiello, Stanislav Fisenko, Kwinten Fransen, Jorg Frauendiener, Jonathan Gair, Laszlo Arpad Gergely, Davide Gerosa, Leonardo Gualtieri, Wen-Biao Han, Aurelien Hees, Thomas Helfer, Jorg Hennig, Alexander C. Jenkins, Eric Kajfasz, Nemanja Kaloper, Vladimir Karas, Bradley J. Kavanagh, Sergei A. Klioner, Savvas M. Koushiappas, Macarena Lagos, Christophe Le Poncin-Lafitte, Francisco S. N. Lobo, Charalampos Markakis, Prado Martin-Moruno, C. J. A. P. Martins, Sabino Matarrese, Daniel R. Mayerson, Jose P. Mimoso, Johannes Noller, Nelson J. Nunes, Roberto Oliveri, Giorgio Orlando, George Pappas, Igor Pikovski, Luigi Pilo, Geraint Pratten, Tomislav Prokopec, Hong Qi, Saeed Rastgoo, Angelo Ricciardone, Rocco Rollo, Diego Rubiera-Garcia, Olga Sergijenko, Stuart Shapiro, Deirdre Shoemaker, Alessandro Spallicci, Oleksandr Stashko, Leo C. Stein, Gianmassimo Tasinato, Andrew J. Tolley, Elias C. Vagenas, Stefan Vandoren, Daniele Vernieri, Rodrigo Vicente, Toby Wiseman, Valery Zhdanov, Miguel Zumalacarregui
Summary: This white paper summarizes the importance of LISA in the field of fundamental physics and discusses future research directions and connections with other working groups.
LIVING REVIEWS IN RELATIVITY
(2022)
Article
Astronomy & Astrophysics
Shinya Kanemura, Kei Yagyu
Summary: A new report from the CDF II experiment shows a significant deviation in the measured mass of the W boson compared to the standard model prediction. While other high energy experiments have consistent results, the possibility of explaining this anomaly using the Higgs triplet model is discussed.
Review
Astronomy & Astrophysics
Pedro G. S. Fernandes, Pedro Carrilho, Timothy Clifton, David J. Mulryne
Summary: This review examines the recent interest in 4D Einstein-Gauss-Bonnet gravity, starting with an introduction to Lovelock's theorem and Gauss-Bonnet terms in gravity action. It discusses the mathematical complexities involved in including Gauss-Bonnet terms in four dimensions through rescaling the coupling parameter and reviews attempts to construct self-consistent theories. The review then explores the implications of 4D Einstein-Gauss-Bonnet gravity in black holes, cosmology, and weak-field gravity, highlighting interesting phenomena in each area.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Astronomy & Astrophysics
Adriano Acunzo, Francesco Bajardi, Salvatore Capozziello
Summary: This article discusses extensions of General Relativity based on the non-local function f(R, rectangle(-1) R) and explores the role of non-locality in cosmology. Viable exact solutions are found by selecting viable models using the Noether Symmetry Approach.
Article
Astronomy & Astrophysics
Shin'ichi Nojiri, Sergei D. Odintsov, Valerio Faraoni
Summary: We propose a new entropy construct that generalizes existing entropies and converges to known entropy in a specific limit. Applying this construct to Schwarzschild black hole and cosmology models, it is shown that it has the potential to describe inflation and/or holographic dark energy.
Article
Physics, Particles & Fields
Dehao Zhao
Summary: In Symmetric Teleparallel General Relativity, gravity is attributed to non-metricity. However, the coordinate system selected based on symmetry may conflict with the choice of coincident gauge. To overcome this problem, we formulate the f(Q) theory in a covariant way, allowing us to find suitable non-vanishing affine connection.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Meng-Lin Du, Vadim Baru, Xiang-Kun Dong, Arseniy Filin, Feng-Kun Guo, Christoph Hanhart, Alexey Nefediev, Juan Nieves, Qian Wang
Summary: In this study, a coupled-channel approach is applied to investigate the charged tetraquark state T-cc(+) recently discovered by the LHCb Collaboration. The observed line shape in the three-body (DD0)-D-0 pi(+) channel is fitted to determine the parameters of the interaction. Special attention is paid to the three-body dynamics in the T-cc(+) and it is argued that considering both the pion exchange between the D and D* mesons and the finite D* width is essential for a self-consistent approach. It is found that the T-cc(+) is a hadronic molecule generated by the interactions in the D*D-+(0) and D*D-0(+) channels, with a compositeness parameter close to unity. Additionally, a predicted isoscalar D* D* molecular partner of the T-cc(+) is proposed under certain assumptions.
Article
Physics, Particles & Fields
Lorenzo Di Pietro, Victor Gorbenko, Shota Komatsu
Summary: This paper investigates the fundamentals of quantum field theory on a rigid de Sitter space and demonstrates that the perturbative expansion of late-time correlation functions can be generated by a non-unitary Lagrangian on a Euclidean AdS geometry. It simplifies perturbative computations and establishes the basic properties of these correlators, which form a Euclidean CFT. The spectral density that captures the conformal partial wave expansion of a late-time four-point function is inferred, an OPE expansion is derived, and the operator spectrum is constrained. Unitarity of the de Sitter theory is manifested as the positivity of the spectral density, and this statement holds non-perturbatively.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Xi-Zhe Ling, Ming-Zhu Liu, Li-Sheng Geng, En Wang, Ju-Jun Xie
Summary: Inspired by the recent discovery of a doubly charmed tetraquark state T-cc(+) by the LHCb Collaboration, this study investigates the decay width of T-cc(+) using the effective Lagrangian approach and assumes it to be an isoscalar DD* molecule. The results show that both T-cc -> DD pi and T-cc -> DD gamma contribute to the decay width, with the former being dominant.
Article
Astronomy & Astrophysics
Yichul Choi, Clay Cordova, Po-Shen Hsin, Ho Tat Lam, Shu-Heng Shao
Summary: This study investigates non-invertible topological defects in quantum systems with higher-form global symmetry and explores their explicit realizations in various cases.
Article
Physics, Particles & Fields
Alessandro Strumia
Summary: The study globally fits electroweak data and finds that new physics corrections can explain the anomaly in the W boson mass. Tree-level contributions from multi-TeV new physics can fit the anomaly compatibly with collider bounds, while loop-level contributions must be around the weak scale to fit the anomaly.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Review
Physics, Nuclear
Hermann Wolter, Maria Colonna, Dan Cozma, Pawel Danielewicz, Che Ming Ko, Rohit Kumar, Akira Ono, ManYee Betty Tsang, Jun Xu, Ying-Xun Zhang, Elena Bratkovskaya, Zhao-Qing Feng, Theodoros Gaitanos, Arnaud Le Fevre, Natsumi Ikeno, Youngman Kim, Swagata Mallik, Paolo Napolitani, Dmytro Oliinychenko, Tatsuhiko Ogawa, Massimo Papa, Jun Su, Rui Wang, Yong-Jia Wang, Janus Weil, Feng-Shou Zhang, Guo-Qiang Zhang, Zhen Zhang, Joerg Aichelin, Wolfgang Cassing, Lie-Wen Chen, Hui-Gan Cheng, Hannah Elfner, K. Gallmeister, Christoph Hartnack, Shintaro Hashimoto, Sangyong Jeon, Kyungil Kim, Myungkuk Kim, Bao-An Li, Chang-Hwan Lee, Qing-Feng Li, Zhu-Xia Li, Ulrich Mosel, Yasushi Nara, Koji Niita, Akira Ohnishi, Tatsuhiko Sato, Taesoo Song, Agnieszka Sorensen, Ning Wang, Wen-Jie Xie
Summary: Transport models are used to obtain physics information on heavy-ion collisions. The Transport Model Evaluation Project aims to test the robustness of these models and find consistent conclusions. Six studies have been performed, showing convergence of results in box calculations, but differences in full heavy-ion collisions. Further comparisons are needed to improve transport simulations and validate the models.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2022)
Article
Physics, Particles & Fields
Seung-Joo Lee, Wolfgang Lerche, Timo Weigand
Summary: In this paper, we propose a conjecture that a quantum gravitational theory in an infinite distance limit of its moduli space either decompactifies or reduces to an asymptotically tensionless, weakly coupled string theory. We support this claim by classifying the behavior of M-Theory and Type IIA string theory compactifications on Calabi-Yau three-folds at infinite distances in Kahler moduli space. The analysis reveals that different types of fibrations lead to different outcomes, including decompactification to F-Theory and emergence of tensionless heterotic or Type II strings.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Byoungjoon Ahn, Sang-Eon Bak, Hyun-Sik Jeong, Keun-Young Kim, Ya-Wen Sun
Summary: This study investigates the Page curve of a nonstandard black hole and finds consistency with the unitarity principle in nonextremal cases. However, further investigation is needed for extremal cases.
Article
Astronomy & Astrophysics
Rittick Roy, Sunny Vagnozzi, Luca Visinelli
Summary: This study reconsiders the evolution of black hole shadows induced by superradiance and investigates the case of two ultralight bosons. The study finds that gas accretion and gravitational wave radiation have a negligible effect on the results, and the inclusion of an additional ultralight boson does not shorten the shadow evolution time scale.
Article
Astronomy & Astrophysics
Yu Cheng, Xiao-Gang He, Zhong-Lv Huang, Ming-Wei Li
Summary: In the Type-II seesaw model, the introduction of an electroweak triplet scalar field Delta is essential for the generation of small neutrino masses. The non-zero vacuum expectation value of Delta affects the W mass, but recent data suggest that this effect can be neglected.
Article
Physics, Particles & Fields
Gustav Uhre Jakobsen, Gustav Mogull, Jan Plefka, Jan Steinhoff
Summary: This article investigates the interaction between two massive compact bodies in a gravitational scattering event and discovers a hidden supersymmetry in the system. It provides calculations for the deflection and spin kick of the two bodies.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
