26-30 July 2021
Europe/Berlin timezone

Measuring the polarization of boosted, hadronic $W$ bosons with jet substructure observables

26 Jul 2021, 10:45


Parallel session talk Top and Electroweak Physics T07: Top and Electroweak Physics


Songshaptak De (IIT Bombay)


In this work, we present a new technique to measure the longitudinal and transverse polarization fractions of hadronic decays of boosted $W$ bosons. We introduce a new jet substructure observable denoted as $p_\theta$, which is a proxy for the parton level decay polar angle of the $W$ boson in its rest frame. We show that the distribution of this observable is sensitive to the polarization of $W$ bosons and can therefore be used to reconstruct the $W$ polarization in a model-independent way. As a test case, we study the efficacy of our technique on vector boson scattering processes at the high luminosity Large Hadron Collider and we find that our technique can determine the longitudinal polarization fraction to within $\pm 0.15$.

Email dingo1691sde@gmail.com
First author Songshaptak De
Collaboration / Activity IIT Bombay

Primary authors

Songshaptak De (IIT Bombay) Prof. Vikram Rentala (IIT Bombay) Prof. William Shepherd (Sam Houston State University)

Presentation Materials