We show that the m(W) measurement is a direct probe of New Physics (NP) contributing to l + MET, independently from indirect tests via the electroweak fit. Such NP modifies the kinematic distributions used to extract m(W), necessitating a simultaneous fit to m(W) and NP. This effect can in principle bias the m(W) measurement, but only to a limited extent for our considered models. Given that, we demonstrate that the agreement at high-precision with SM-predicted shapes results in bounds competitive to, if not exceeding, existing ones for two examples: anomalous W decay involving a L-mu - L-tau gauge boson and (v) over tilde (l)(l) over tilde production in the MSSM.
Agashe, K., Airen, S., Franceschini, R., Kim, D., Kotwal, A.V., Ricci, L., et al. (2024). A new purpose for the W-boson mass measurement: Searching for New Physics in lepton+MET. PHYSICS LETTERS. SECTION B, 855 [10.1016/j.physletb.2024.138774].
A new purpose for the W-boson mass measurement: Searching for New Physics in lepton+MET
Franceschini, Roberto;
2024-01-01
Abstract
We show that the m(W) measurement is a direct probe of New Physics (NP) contributing to l + MET, independently from indirect tests via the electroweak fit. Such NP modifies the kinematic distributions used to extract m(W), necessitating a simultaneous fit to m(W) and NP. This effect can in principle bias the m(W) measurement, but only to a limited extent for our considered models. Given that, we demonstrate that the agreement at high-precision with SM-predicted shapes results in bounds competitive to, if not exceeding, existing ones for two examples: anomalous W decay involving a L-mu - L-tau gauge boson and (v) over tilde (l)(l) over tilde production in the MSSM.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
