22-29 July 2015
Europe/Vienna timezone

Subleading processes in production of $W^+ W^-$ pairs in proton-proton collisions

Jul 24, 2015, 2:30 PM
18m
HS31

HS31

talk Top and Electroweak Physics Top and Electroweak Physics

Speaker

Antoni Szczurek (Institute of Nuclear Physics)

Description

$W^+ W^-$ production is one of the golden channels for testing the Standard Model as well as for searches beyond the Standard Model. We discuss many new subleading processes for inclusive production of $W^+ W^-$ pairs not included in the literature so far. We focus on photon-photon induced processes. We include elastic-elastic, elastic-inelastic, inelastic-elastic and inelastic-inelastic contributions in the formalism with photonic PDFs. We also calculate the contributions with resolved photons including the partonic substructure of the virtual photon. We include in addition single and central diffractive production of $W^+ W^-$ pairs as well as double parton scattering contribution. Predictions for the total cross section and differential distributions in $W$- boson rapidity and transverse momentum as well as $WW$ invariant mass are presented. The $\gamma \gamma$ components constitute only about 1-2 but increases up to about 10 and are even comparable to the dominant $q \bar q$ component at large $M_{WW}$. The photon-photon contributions are very important in the context of studying anomalous triple and quartic boson couplings. The DPS component gives large contribution for large $W^+ W^-$ invariant masses or large rapidity distances. We discusses all the missing terms in the context of recent ATLAS and CMS data.

additional information

literature:

M. Luszczak, A. Szczurek and Ch. Royon,
JHEP 02 (2015) 098.

Primary author

Antoni Szczurek (Institute of Nuclear Physics)

Co-author

Marta Luszczak (University of Rzeszow)

Presentation materials