Reference : Left-handed W bosons at the LHC
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/9075
Left-handed W bosons at the LHC
English
Bern, Z. [University of California, Los Angeles - UCLA > Department of Physics and Astronomy]
Diana, Giovanni mailto [CEA–Saclay > Institut de Physique Theorique]
Dixon, L. J. [CERN > Theory Division]
Cordero, F. Febres [Universidad Simon Bolıvar > Departamento de Fısica]
Forde, D. [CERN > Theory division]
Gleisberg, T. [Stanford University > SLAC National Accelerator Laboratory]
Hoche, S. [Stanford University > SLAC National Accelerator Laboratory]
Ita, H. [University of California, Los Angeles - UCLA > Department of Physics and Astronomy]
Kosower, D. A. [CEA–Saclay > Institut de physique theorique]
Maitre, D. [CERN, > Theory division]
Ozeren, K. [University of California, Los Angeles - UCLA > Department of Physics and Astronomy]
2011
Physical Review D
American Physical Society
84
3
034008
Yes
International
[en] The production of W bosons in association with jets is an important background to new physics at the LHC. Events in which the W carries large transverse momentum and decays leptonically lead to large missing energy and are of particular importance. We show that the left-handed nature of the W coupling, combined with valence quark domination at a pp machine, leads to a large left-handed polarization for both W+ and W- bosons at large transverse momenta. The polarization fractions are very stable with respect to QCD corrections. The leptonic decay of the W± bosons translates the common left-handed polarization into a strong asymmetry in transverse momentum distributions between positrons and electrons and between neutrinos and antineutrinos (missing transverse energy). Such asymmetries may provide an effective experimental handle on separating W+jets from top-quark production, which exhibits very little asymmetry due to C invariance, and from various types of new physics.
http://hdl.handle.net/10993/9075
10.1103/PhysRevD.84.034008
http://prd.aps.org/abstract/PRD/v84/i3/e034008

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