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Enhanced nonperturbative effects in jet distributions
Christian W. Bauer, Aneesh V. Manohar, Mark B. Wise
We consider the triple differential distribution dΓ/(dE_J)(dm_J^2)(dΩ_J) for two-jet events at center of mass energy M, smeared over the endpoint region m_J^2 << M^2, |2 E_J -M| ~…
B decay shape variables and the precision determination of |Vcb| and mb
Christian W. Bauer, Zoltan Ligeti, Michael Luke +1
We present expressions for shape variables of B decay distributions in several different mass schemes, to order and (Lambda_{QCD}/mb)^3. Such observables are sensitive t…
Isospin violation in e+ e- --> B Bbar
Roland Kaiser, Aneesh V. Manohar, Thomas Mehen
The ratio of the B+ B- and B0 B0bar production rates in e+ e- annihilation is computed as a function of the B meson velocity and BB* pi coupling constant, using a non-relativistic…
Delta --> N gamma in Large-Nc QCD
E. Jenkins, X. Ji, A. V. Manohar
The decay Delta^+ --> p gamma is studied in the 1/N_c expansion of QCD. The ratio of the helicity amplitudes is determined to be A_{3/2}/A_{1/2} = \sqrt{3} + O(1/N_c^2). Equivalent…
Reparameterization Invariance for Collinear Operators
Aneesh V. Manohar, Thomas Mehen, Dan Pirjol +1
We discuss restrictions on operators in the soft-collinear effective theory (SCET) which follow from the ambiguity in the decomposition of collinear momenta and the freedom in the…