Monte Carlo event generators & the top quark forward-backward asymmetry
نویسندگان
چکیده
منابع مشابه
Top Quark Mass Calibration for Monte Carlo Event Generators.
The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator m_{t}^{MC}. Because of hadronization and parton-shower dynamics, relating m_{t}^{MC} to a field theory mass is difficult. We present a calibration procedure to determine this relation using hadron level QCD predictions for observables with kinema...
متن کاملThe Top Quark Forward-backward Asymmetry at Approximate N3LO
I calculate the top quark forward-backward asymmetry at the Tevatron in both the laboratory frame and the tt̄ rest frame. I show that soft-gluon corrections are the dominant contribution to the asymmetry and closely approximate exact results through next-tonext-to-leading order (NNLO). I present a calculation of the asymmetry including approximate next-to-next-to-next-to-leading-order (N3LO) sof...
متن کاملTop quark forward-backward asymmetry from new t-channel physics
Sunghoon Jung, Hitoshi Murayama, Aaron Pierce, and James D. Wells Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109, USA Department of Physics, University of California, Berkeley, California 94720, USA Theoretical Physics Group, LBNL, Berkeley, California 94720, USA IPMU, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Japan 277-8568 CERN Theoretical ...
متن کاملTop Quark Rapidity Distribution and Forward-backward Asymmetry
I present results for the top quark rapidity distribution at LHC and Tevatron energies, including higher-order corrections from threshold resummation. The next-tonext-to-leading-order (NNLO) soft-gluon corrections at next-to-next-to-leading-logarithm (NNLL) level are added to the NLO result. Theoretical predictions are shown for the rapidity distribution, including the scale dependence of the d...
متن کاملTop quark forward-backward asymmetry and same-sign top quark pairs.
The top quark forward-backward asymmetry measured at the Tevatron collider shows a large deviation from standard model expectations. Among possible interpretations, a nonuniversal Z' model is of particular interest as it naturally predicts a top quark in the forward region of large rapidity. To reproduce the size of the asymmetry, the couplings of the Z' to standard model quarks must be large, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2013
ISSN: 2100-014X
DOI: 10.1051/epjconf/20134917001