Phenomenology 2023 Symposium

Session

BSM II

8 May 2023, 14:15

University of Pittsburgh

Conveners

BSM II

• LINGFENG LI (Brown U.)

178. Searching for Lepto-philic Z’ at Future Lepton Colliders

Si Wang

08/05/2023, 14:15

BSM

With simplest extension of SM symmetry by adding one extra U(1) symmetry, we introduce a new particle Z'. From the collider kinematic variable distribution, we can measure the deviation of the new model from background, with the sensitivity equation, we plot the constraints. Compare to current weak experimental constraints, we have better constraints in our lepton collider processes.

65. Probing New Physics with $\mu^+ \mu^- \to bs$ at a Muon Collider

Sri Aditya Gadam

08/05/2023, 14:30

BSM

We show that bottom-strange production at a high energy muon collider, $\mu^+ \mu^- \to b s$, is a sensitive probe of new physics. We consider the full set of four fermion contact interactions that contribute to this process at dimension 6, and discuss the complementarity of a muon collider and rare $B$ meson decays that probe the new physics.
If a signal were to be found at a muon collider,...

71. Isosinglet vectorlike leptons at $e^+ e^-$ colliders

Prudhvi Bhattiprolu (University of Michigan)

08/05/2023, 14:45

BSM

Vectorlike leptons are an intriguing possibility for physics beyond the Standard Model. This talk is concerned with the example of weak isosinglet vectorlike leptons that decay through a small mixing with the tau lepton, for which the discovery and exclusion reach of the Large Hadron Collider and future proposed hadron colliders is limited. For this minimal model, I will argue that an $e^+...

173. Testing Lepton Flavor Universality at Future Lepton Colliders

Xuhui JIANG

08/05/2023, 15:00

BSM

As one of the hypothetical principles in the Standard Model (SM), lepton flavor universality (LFU) should be tested with a precision as high as possible such that the physics violating this principle can be fully examined. The run of $Z$ factory at a future $e^+e^-$ collider such as CEPC or FCC-$ee$ provides a great opportunity to perform this task because of the large statistics and high...

36. Lepton Flavor Violation at Electron-Positron Colliders

Pankaj Munbodh (University of California Santa Cruz)

08/05/2023, 15:15

BSM

Lepton Flavor Violation (LFV) is one of the cleanest probes of Beyond the Standard Model (BSM) Physics. In this work, we explore the sensitivity of the channel $e^+ e^- \to \tau \mu$ to BSM physics above the $\sim$ TeV scale at the proposed circular electron-positron collider FCC-ee. We compute the expected cross-section $\sigma(e^+ e^- \to \tau \mu)$ in the Standard Model Effective Field...

101. CP Violating Top Higgs Coupling at the Future Muon Collider

Morgan Cassidy

08/05/2023, 15:30

BSM

We study a CP violating top-Higgs coupling at the future muon collider. We consider the processes $tth$, $tth\nu\nu$, and $tbh\mu\nu$. Using energies of 1, 3, 10, and 30 TeV, we discuss cross section dependence on the CP phase and show how different processes dominate at different benchmark energies. We give projected bounds on the CP phase at 95% CL and discuss the required luminosity for...

175. Invisible Higgs from forward muons at a muon collider

Maximilian Ruhdorfer (Cornell)

08/05/2023, 15:45

BSM

In this talk I will propose to probe the Higgs boson decay to invisible particles at a muon collider by observing the forward muons that are produced in association with the Higgs in the Z-boson fusion channel. I will argue that an excellent sensitivity is possible provided a forward muon detector is installed. We find that the resolution on the measurement of the muon energy and angle will be...