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Proton structure, small-and large-x physics(II)

Date: 12 Sep 11:25 - 13:05

Conveners

    • Bruno El-Bennich, Amir Rezaeian
    • Chairperson: María Elena Tejeda-Yeomans

Timetable | Contribution List

Displaying 4 contributions out of 4
As active data taking has moved to the LHC at CERN, more and more LHC data have been included into fits of parton distribution functions. An anomaly has arisen where formerly excellent agreement between theoretical predictions and experiment in single-top-quark production at the Tevatron is no longer quite as good. Is this indicative of a deeper issue?
Presented by Prof. Zack SULLIVAN on 12/9/2017 at 12:15
We construct small-x evolution equations for the quark and gluon helicity distributions. The equations present a new type of evolution, resumming double logarithms of energy, that is, powers of $\alpha_s \, \ln^2 (1/x)$. We solve the equations both analytically and numerically and obtain the following small-x asymptotics for the quark and gluon helicity distributions: $\Delta q \sim \lef ... More
Presented by Prof. Yuri KOVCHEGOV on 12/9/2017 at 11:25
Consider the production of a hard dijet in high-energy DIS with large average transverse momentum \vec{P} = (\vec{k1}-\vec{k2})/2 and small(er) momentum imbalance \vec{q} = \vec{k1}+\vec{k2}. The cross section involves a sum of an isotropic contribution proportional to the conventional Weizsaecker-Williams gluon distribution and of a contribution proportional to cos(2phi) times the WW distribution ... More
Presented by Adrian DUMITRU on 12/9/2017 at 12:40
We evaluate the impact of recent developments in hadron phenomenology on constraining the electroweak effective theory Lagrangian beyond the standard model. We focus, in particular, on the scalar and tensor components which can be measured in precision neutron beta decay. We show how a class of new observables, the chiral-odd generalized parton distributions, along with the extraction of the t ... More
Presented by Dr. Aurore COURTOY on 12/9/2017 at 11:50
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