Charge Asymmetry in Hadroproduction of Heavy Quarks

Abstract In this work, we extended our statistical model with charmed and bottomed hadrons, and fit the quark creational probabilities for the heavy quarks, using low energy inclusive charmonium and bottomonium data. With the finalized fit for all the relevant types of quarks (up, down, strange, charm, bottom) at the energy range from a few GeV up to a few tens of GeV’s, the model is now considered complete. Some examples are also given for proton–proton, pion–proton, and proton–antiproton collisions with charmonium, bottomonium, and open charm hadrons in the final state.

Download Full-text

Constraints on cosmic electric charge asymmetry and neutrino charge from the microwave background

Physics Letters B ◽

10.1016/0370-2693(95)01261-3 ◽

1996 ◽

Vol 365 (1-4) ◽

pp. 175-177 ◽

Cited By ~ 8

Author(s):

Sujan Sengupta ◽

Palash B. Pal

Keyword(s):

Electric Charge ◽

Charge Asymmetry ◽

Microwave Background

Download Full-text

Antimatter Free-Fall Experiments and Charge Asymmetry

Symmetry ◽

10.3390/sym13071192 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1192

Author(s):

Ulrich David Jentschura

Keyword(s):

Field Theory ◽

Asymmetry Parameter ◽

Charge Asymmetry ◽

Free Fall ◽

Experimental Setup ◽

Charge Neutrality ◽

The Earth ◽

Antimatter Gravity ◽

Precision Test ◽

Theoretical Side

We propose a method by which one could use modified antimatter gravity experiments in order to perform a high-precision test of antimatter charge neutrality. The proposal is based on the application of a strong, external, vertically oriented electric field during an antimatter free-fall gravity experiment in the gravitational field of the Earth. The proposed experimental setup has the potential to drastically improve the limits on the charge-asymmetry parameter ϵ¯q of antimatter. On the theoretical side, we analyze possibilities to describe a putative charge-asymmetry of matter and antimatter, proportional to the parameters ϵq and ϵ¯q, by Lagrangian methods. We found that such an asymmetry could be described by four-dimensional Lorentz-invariant operators that break CPT without destroying the locality of the field theory. The mechanism involves an interaction Lagrangian with field operators decomposed into particle or antiparticle field contributions. Our Lagrangian is otherwise Lorentz, as well as PT invariant. Constraints to be derived on the parameter ϵ¯q do not depend on the assumed theoretical model.

Download Full-text

Charged current Drell-Yan production at N3LO

Journal of High Energy Physics ◽

10.1007/jhep11(2020)143 ◽

2020 ◽

Vol 2020 (11) ◽

Cited By ~ 1

Author(s):

Claude Duhr ◽

Falko Dulat ◽

Bernhard Mistlberger

Keyword(s):

Cross Section ◽

Cross Sections ◽

Production Cross Section ◽

Production Cross ◽

Hadron Collider ◽

Charge Asymmetry ◽

Charged Current ◽

Leading Order ◽

Neutrino Pair ◽

The Impact

Abstract We present the production cross section for a lepton-neutrino pair at the Large Hadron Collider computed at next-to-next-to-next-to-leading order (N3LO) in QCD perturbation theory. We compute the partonic coefficient functions of a virtual W± boson at this order. We then use these analytic functions to study the progression of the perturbative series in different observables. In particular, we investigate the impact of the newly obtained corrections on the inclusive production cross section of W± bosons, as well as on the ratios of the production cross sections for W+, W− and/or a virtual photon. Finally, we present N3LO predictions for the charge asymmetry at the LHC.

Download Full-text