110 research outputs found
Split SUSY Radiates Flavor
Radiative flavor models where the hierarchies of Standard Model (SM) fermion
masses and mixings are explained via loop corrections are elegant ways to solve
the SM flavor puzzle. Here we build such a model in the context of Mini-Split
Supersymmetry (SUSY) where both flavor and SUSY breaking occur at a scale of
1000 TeV. This model is consistent with the observed Higgs mass, unification,
and WIMP dark matter. The high scale allows large flavor mixing among the
sfermions, which provides part of the mechanism for radiative flavor
generation. In the deep UV, all flavors are treated democratically, but at the
SUSY breaking scale, the third, second, and first generation Yukawa couplings
are generated at tree level, one loop, and two loops, respectively. Save for
one, all the dimensionless parameters in the theory are O(1), with the
exception being a modest and technically natural tuning that explains both the
smallness of the bottom Yukawa coupling and the largeness of the Cabibbo angle.Comment: 55 pages, 14 figures. v2: Typos fixed and references added. v3: More
typos fixed and figure correcte
Probing Quarkonium Production Mechanisms with Jet Substructure
We use fragmenting jet functions (FJFs) in the context of quarkonia to study
the production channels predicted by NRQCD (3S_1^(1), 3S_1^(8), 1S_0^(8),
3P_J^(8)). We choose a set of FJFs that give the probability to find a
quarkonium with a given momentum fraction inside a cone-algorithm jet with
fixed cone size and energy. This observable gives several lever arms that allow
one to distinguish different production channels. In particular, we show that
at fixed momentum fraction the individual production mechanisms have distinct
behaviors as a function of the the jet energy. As a consequence of this fact,
we arrive at the robust prediction that if the depolarizing 1S_0^(8) matrix
element dominates, then the gluon FJF will diminish with increasing energy for
fixed momentum fraction, z, and z > 0.5.Comment: 13 pages, 6 figures; v2: Typos fixed, figures updated and new figure
added to reflect nontrivial error correlation in long-distance matrix element
determination which leads to stronger prediction for our observables; v3:
Operational discussion of fragmenting jet function expanded and figure typo
fixe
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