# Seattle Snowmass Summer Meeting 2022

Jul 16 – 26, 2022
US/Pacific timezone

## Longitudinally polarized ZZ scattering at a muon collider

Jul 18, 2022, 7:00 PM
2h 20m
211 South Ballroom (HUB)

### Speaker

Tianyi Yang (Peking University(CN))

### Description

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$fb^{-1}$, and advanced data analysis technique to reach the discovery threshold due to its small production rates. Instead, there could be great potential at future colliders. We perform a Monte Carlo study and examine the projected sensitivity of longitudinally polarized $ZZ$ scattering at a TeV scale muon collider. We conduct studies at 14TeV and 6TeV muon colliders respectively and find that a 5 standard deviation discovery can be achieved at a 14TeV muon collider, with 3000$fb^{-1}$ of data collected. While a 6TeV muon collider can already surpass HL-LHC, reaching 2 standard deviations with around 4$ab^{-1}$ of data. The effect from lepton isolation and detector granularity is also discussed, which may be more obvious at higher energy muon colliders, as the leptons from longitudinally polarized Z decays tend to be closer.

In-person or Virtual? Virtual

### Primary authors

Mr Congqiao Li (Peking University) Qiang Li (Peking University (CN)) Tianyi Yang (Peking University(CN)) Mr Jie Xiao (Peking University) Mr Meng Lu (Sun Yat-sen University) Mr Sitian Qian (Peking University) Mr Zhe Guan (Peking University)