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Constraining $Z^\prime$ widths from $p_T$ measurements in Drell-Yan processes

May 16, 2017, 2:00 PM
Haoran 102 (Shanghai Jiao Tong University)

Haoran 102

Shanghai Jiao Tong University

Xuhui Campus


Juri Fiaschi (University of Southampton)


We define a Focus Point (FP) Asymmetry, $A_{\rm FP}$, obtained by integrating the normalised transverse momentum distribution of either lepton produced in the Drell-Yan (DY) process below and above a point where a variety of popular $Z^\prime$ models all have the same magnitude.
For a given $Z^\prime$ mass the position of this FP is predictable, depending only on the collider energy and on the low transverse momentum cut chosen in the normalisation procedure.
The resulting $A_{\rm FP}$ is very sensitive to the $Z^\prime$ width, and can be used to constrain this parameter in experimental fits.

Primary authors

Juri Fiaschi (University of Southampton) Elena Accomando (Southampton University) Stefano Moretti (STFC - Rutherford Appleton Lab. (GB)) Claire Shepherd-Themistocleous (STFC - Rutherford Appleton Lab. (GB))

Presentation materials