第九届中国LHC物理年会 The 9th China LHC Physics Workshop (CLHCP2023)

Double Parton Scattering Effect in the Measurement of W-Mass

18 Nov 2023, 09:30

20m

Function Room 9 光大9号厅 (2nd Floor 光大二楼)

Theory

Speaker

Rui Zhang (IHEP)

Description

Recently, the $W$ boson mass measured by the CDF-II collaboration shows large tension with the standard model prediction and other measurements. In this work, we look into the double parton scattering (DPS) contribution in CDF-II W mass measurement. We show that the DPS process can increase the measured mass as $\Delta M_W=20-200~\mbox{MeV}$ for the missing transverse momentum fit and $\Delta M_W=0-50~\mbox{MeV}$ for the transverse mass fit. It is comparable to the W-mass tension and should be take into consideration. The DPS effect can also appears in other inclusive measurements, since it contributes $\sim10^{-2}$ events in total and cause a $\mathcal{O}(10^{-2})-\mathcal{O}(10^{-1})~\mbox{GeV}$ shift of the missing transverse momentum.

Presentation materials

ruizhang.pdf