Jorge De Blas, Dario Buttazzo, Rodolfo Capdevilla, David Curtin, Roberto Franceschini, Fabio Maltoni, Patrick Meade, Federico Meloni, Shufang Su, Eleni Vryonido… 展开作者
Jorge De Blas, Dario Buttazzo, Rodolfo Capdevilla, David Curtin, Roberto Franceschini, Fabio Maltoni, Patrick Meade, Federico Meloni, Shufang Su, Eleni Vryonidou, Andrea Wulzer, Chiara Aimè, Aram Apyan, Pouya Asadi, Mohammed Attia Mahmoud, Aleksandr Azatov, Nazar Bartosik, Alessandro Bertolin, Salvatore Bottaro, Laura Buonincontri, Massimo Casarsa, Luca Castelli, Maria Gabriella Catanesi, Francesco Giovanni Celiberto, Alessandro Cerri, Cari Cesarotti, Grigorios Chachamis, Siyu Chen, Yang-Ting Chien, Mauro Chiesa, Marco Costa, Giacomo Da Molin, Sridhara Dasu, Dmitri Denisov, Haluk Denizli, Radovan Dermisek, Luca Di Luzio, Biagio Di Micco, Keith Dienes, Tommaso Dorigo, Marco Fabbrichesi, Davide Fiorina, Matthew Forslund, Emidio Gabrielli, Francesco Garosi, Alfredo Glioti, Mario Greco, Admir Greljo, Ramona Groeber, Christophe Grojean, Jiayin Gu, Chengcheng Han, Tao Han, Keith Hermanek, Matthew Herndon, Tova Ray Holmes, Samuel Homiller, Guoyuan Huang, Sudip Jana, Sergo Jindariani, Yonatan Kahn, Wolfgang Kilian, Patrick Koppenburg, Nils Kreher, Karol Krizka, Gordan Krnjaic, Nilanjana Kumar, Lawrence Lee, Qiang Li, Zhen Liu, Kenneth Long, Ian Low, Qianshu Lu, Donatella Lucchesi, Lianliang Ma, Yang Ma, Luca Mantani, David Marzocca, Navin McGinnis, Barbara Mele, Claudia Merlassino, Alessandro Montella, Marco Nardecchia, Federico Nardi, Paolo Panci, Simone Pagan Griso, Giuliano Panico, Paride Paradisi, Nadia Pastrone, Fulvio Piccinini, Karolos Potamianos, Emilio Radicioni, Riccardo Rattazzi, Diego Redigolo, Laura Reina, Jürgen Reuter, Cristina Riccardi, Lorenzo Ricci, Luciano Ristori, Tania Natalie Robens, Werner Rodejohann, Richard Ruiz, Farinaldo S. Queiroz, Filippo Sala, Jakub Salko, Paola Salvini, Jose Santiago, Ivano Sarra, Daniel Schulte, Michele Selvaggi, Abdulkadir Senol, Lorenzo Sestini, Varun Sharma, Rosa Simoniello, Giordon Holtsberg Stark, Daniel Stolarski, Wei Su, Olcyr Sumensari, Xiaohu Sun, Tim M. P. Tait, Jian Tang, Andrea Tesi, Brooks Thomas, Emily Anne Thompson, Riccardo Torre, Sokratis Trifinopoulos, Ilaria Vai, Alessandro Valenti, Ludovico Vittorio, Liantao Wang, Yongcheng Wu, Keping Xie, Xiaoran Zhao, Jose Zurita
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73 pages, 28 figures; Contribution to Snowmass 2021
In the path towards a muon collider with center of mass energy of 10 TeV or more, a stage at 3 TeV emerges as an appealing option. Reviewing the physics potential of such muon collider is the main purpose of this document. In order to outline the progression of the physics performances across the stages, a few sensitivity projections for higher energy are also presented. There are many opportunities for probing new physics at a 3 TeV muon collider. Some of them are in common with the extensively documented physics case of the CLIC 3 TeV energy stage, and include measuring the Higgs trilinear coupling and testing the possible composite nature of the Higgs boson and of the top quark at the 20 TeV scale. Other opportunities are unique of a 3 TeV muon collider, and stem from the fact that muons are collided rather than electrons. This is exemplified by studying the potential to explore the microscopic origin of the current $g$-2 and $B$-physics anomalies, which are both related with muons.
In recent years, with the enlightenment of some issues encountered at muon colliders, muon colliders have become more feasible for the high-energy physics community. For this reason, we studied single production of excited muon at muon colliders via contact interaction. Besides, we assumed that the excited muon is produced via contact interactions and decays to the photon and the muon through the gauge interaction. Then, signal and background analyses were performed at the muon anti-muon collider options with 6 TeV, 14 TeV, and 100 TeV center-of-mass energies for the excited muon. Attainable m…
We describe recent work on the physics of the Higgs boson at future muon colliders. Starting from the low energy muon collider at the Higgs boson pole we extend our discussion to the multi-TeV muon collider and outline the physics case for such machines about the properties of the Higgs boson and physics beyond the Standard Model that can be possibly discovered.
The long-standing discrepancy of muon $g-2$ is a hint of new physics beyond the standard model of particle physics. In this letter we show that heavy new physics contribution can be fully tested at a muon collider with center-of-mass energy up to $O(10)\,$TeV. Even if there is no new particle in this energy range, one can measure the $g-2$ directly via the channel to a Higgs boson and a monochromatic photon.
Recently proposed Future Circular Collider based muon-proton colliders will allow investigating lepton-hadron interactions at the highest center-of-mass energy. In this study, we investigate the potential of these colliders for a four-fermion contact interactions search. Regarding the constructive and destructive interferences of contact interactions, we estimated discovery, observation, and exclusion limits on the compositeness scale for the left-left, right-right, left-right, and right-left helicity structures. This study's findings show that the FCC-based μp colliders have great potential f…
An electron-muon collider with an asymmetric collision profile targeting multi-ab$^{-1}$ integrated luminosity is proposed. This novel collider, operating at collisions energies of e.g. 20-200 GeV, 50-1000 GeV and 100-3000 GeV, would be able to probe charged lepton flavor violation and measure Higgs boson properties precisely. The collision of an electron and muon beam leads to less physics background compared with either an electron-electron or a muon-muon collider, since electron-muon interactions proceed mostly through higher order vector boson fusion and vector boson scattering processes. …
We discuss the discovery potential of a promising signals, $3 \times μ^+ μ^-$ at a $μ^+ μ^-$ collider and $μ^+ μ^+ μ^+ μ^+ μ^- μ^- $ at a $μ^+ μ^+$ collider, that are obtained via production of $Z'$ and a new scalar boson $ϕ$ in a spontaneously broken local $U(1)_{L_μ- L_τ}$ model. We consider the $Z'$ associated production from the process $μ^+ μ^- \to ϕZ'$ in addition to a muonphilic $Z'$ fusion process $μ^+ μ^\pm \to ϕμ^+ μ^\pm$. The scalar boson is associated with $U(1)_{L_μ- L_τ}$ symmetry breaking and dominantly decays into $Z' Z'$ mode. We carry out numerical simulation analysis for sig…
Topcolor and the First Muon Collider (Talk presented at the Workshop on Physics at the First Muon Collider and at the Front End of the Muon Collider, Nov. 1997)
Measuring longitudinally polarized vector boson scattering in, e.g., the ZZ channel is a promising way to investigate the unitarization scheme from the Higgs and possible new physics beyond the Standard Model. However, at the LHC, it demands the end of the HL-LHC lifetime luminosity, 3000/fb, and advanced data analysis technique to reach the discovery threshold due to its small production rates. Instead, there could be great potential for future colliders. In this paper, we perform a Monte Carlo study and examine the projected sensitivity of longitudinally polarized ZZ scattering at a TeV scal…
We point out that heavy new physics contributions in leptonic dipole moments and high-energy cross-sections of lepton pairs into Higgs bosons and photons are connected model-independently. In particular, we demonstrate that a muon collider, running at center-of-mass energies of several TeV, can provide a unique test of new physics in the muon g-2 through the study of high-energy processes such as mu+ mu- -> h gamma. This high-energy test would be of the utmost importance to shed light on the long-standing muon g-2 anomaly as it is not affected by the hadronic and experimental uncertainties ent…
Lepton Flavor Violating (LFV) processes are clear signals of physics beyond the Standard Model. We investigate the possibility of measuring this kind of processes at present and foreseeable future muon-electron colliders, taking into account present day bounds from existing experiments. As a model of new physics we consider a Z' boson with a $U'(1)$ gauge symmetry and generic couplings. Processes that violate lepton flavor by two units seem to be particularly promising.
The long-standing muon g-2 anomaly can be explained by heavy new physics particles through chirally enhanced contributions. It has been recently proposed that a muon collider running at center-of-mass energies of several TeV could test these new physics scenarios in a model-independent way, through the study of high-energy processes such as mu+ mu- --> h gamma. In this work, we validate these findings, based on effective field theories, by considering selected renormalizable simplified models and by computing this one-loop process in full generality. Furthermore, we explore the interplay of di…
A light leptophilic boson (scalar or pseudoscalar) has been postulated to explain the muon g-2 anomaly and could be a portal to dark matter. Realizing the leptophilic nature of a singlet boson in the framework of the two-Higgs-doublet-Model of type-X, we identify the parameter space viable for the explanation of the updated muon g-2 discrepancy. It is then shown that such a hypothetical particle will be unambiguously ruled out or discovered via the Yukawa process at a lepton collider designed as a Higgs factory.
A high-energy muon collider with center-of-mass energy around and above 10 TeV is also a vector boson fusion (VBF) machine, due to the significant virtual electroweak (EW) gauge boson content of high-energy muon beams. This feature, together with the clean environment, makes it an ideal collider to search for TeV-scale axion-like particles (ALP) coupling to Standard Model EW gauge bosons, which current and other future colliders have limited sensitivities to. We present detailed analyses of heavy ALP searches in both the VBF and associated production channels at a muon collider with different …
Muonphilic asymmetric dark matter at a future muon collider
School of Physics and Astronomy, Monash University（莫纳什大学物理与天文学院）；ARC Centre of Excellence for Dark Matter Particle Physics, School of Physics, The University of Melbourne（墨尔本大学物理学院暗物质粒子物理卓越研究中心）
As the planning stages for a high energy muon collider enter a more concrete era, an important question arises as to what new physics could be uncovered. A TeV-scale muon collider is also a vector boson fusion (VBF) factory with a very clean background, and as such it is a promising environment to look for new physics that couples to the electroweak (EW) sector. In this paper, we explore the ability of a future TeV-scale muon collider to search for Majorana and Dirac Heavy Neutral Leptons (HNLs) produced via EW bosons. Employing a model-independent, conservative approach, we present an estimat…
The $s$-channel resonant production of the Higgs boson at a 125 GeV muon collider enables a unique way to determine the Higgs properties. However, a clear picture of the achievable Higgs precision has not yet been established. We perform a phenomenological study of the Higgs measurements at such resonant muon collider Higgs factory and present a systematic, detailed, and consistent extraction of Higgs precision measurements. Many new aspects about the lineshape scan, including the scaling with luminosity, optimal scan range, minimal scan steps, correlations with exclusive measurement, effectiv…
Construction of future Muon Collider (or dedicated mu-ring) tangential to the energy frontier pp colliders will give opportunity to realize mu-p collisions at multi-TeV center of mass energies at a luminosity of order of $10^{33}$ cm$^{-2}$s$^{-1}$ ($10^{34}$ cm$^{-2}$s$^{-1}$). Obviously, such colliders will essentially enlarge the physics search potential of corresponding muon and hadron colliders for both the SM (especially for clarifying QCD basics) and BSM phenomena. This paper is devoted to review of main parameters of mu-p colliders proposed until now.
We explore the sensitivity of directly testing the muon-Higgs coupling at a high-energy muon collider. This is strongly motivated if there exists new physics that is not aligned with the Standard Model Yukawa interactions which are responsible for the fermion mass generation. We illustrate a few such examples for physics beyond the Standard Model. With the accidentally small value of the muon Yukawa coupling and its subtle role in the high-energy production of multiple (vector and Higgs) bosons, we show that it is possible to measure the muon-Higgs coupling to an accuracy of ten percent for a …
We study the discovery potential for heavy axion-like particles (ALPs) and the perspectives for determining their coupling properties at a muon collider. Focusing on their couplings to the Standard Model (SM) gauge bosons $γ, Z, W^\pm$, we show that a high-energy muon collider can substantially extend the mass coverage, essentially reaching the kinematic limit of the collider energy. The unique kinematics allow for non-ambiguous determination of the individual coupling strengths. The associated production via $μ^+μ^-$ annihilation and the VBF processes with the tagged outgoing muons can be uti…
