[Theory-seminars] Theory Seminar - July 11 | A. Bacchetta

[Andrea Signori]

Dear all,

next week there will be one Theory Seminar, on Wednesday July 11 at 1:00pm.
Details below:

Wednesday, July 11 - 1:00pm - CEBAF Center, Room L102
Alessandro Bacchetta (Pavia U. and INFN): 
"Effect of flavor-dependent partonic transverse momentum on the determination of the W boson mass in hadronic collisions"

The link to attend the seminar remotely via Bluejeans is available at https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html <https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html> 
Looking forward to seeing you next week,

    Alessandro, Andrea, Bipasha

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Abstract: 
Within the framework of transverse-momentum-dependent factorization, we investigate for the first time the impact of a flavor-dependent intrinsic transverse momentum of quarks on the production of W^± bosons in proton-proton collisions at \sqrt{s} = 7 TeV. 
We estimate the shift in the extracted value of the W boson mass (M_W) induced by different choices of flavor-dependent parameters for the intrinsic quark transverse momentum by means of a template fit to the transverse-mass and the lepton transverse-momentum distributions of the W-decay products. 
We obtain − 11 ≤ ∆MW^+ ≤ 4MeV and−6 ≤ ∆MW^− ≤ 2 MeV with a statistical uncertainty of ± 4 MeV. 
These findings call for more detailed investigations of flavor-dependent nonperturbative effects linked to the proton structure at hadron colliders.
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