تقرير
Left-Handed W Bosons at the LHC
| العنوان: | Left-Handed W Bosons at the LHC |
|---|---|
| المؤلفون: | Bern, Z., Diana, G., Dixon, L. J., Cordero, F. Febres, Forde, D., Gleisberg, T., Hoeche, S., Ita, H., Kosower, D. A., Maitre, D., Ozeren, K. |
| المصدر: | Phys.Rev.D84:034008,2011 |
| سنة النشر: | 2011 |
| المجموعة: | High Energy Physics - Phenomenology High Energy Physics - Theory |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Theory |
| الوصف: | 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 anti-neutrinos (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. Comment: 32 pages, revtex, 17 figures, 3 tables, v2 minor corrections to ME+PS results, no changes to conclusions, added references |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.84.034008 |
| URL الوصول: | http://arxiv.org/abs/1103.5445 |
| رقم الأكسشن: | edsarx.1103.5445 |
| قاعدة البيانات: | arXiv |
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