82 research outputs found
NRQCD Analysis of Bottomonium Production at the Tevatron
Recent data from the CDF collaboration on the production of spin-triplet
bottomonium states at the Tevatron p \bar p collider are analyzed within the
NRQCD factorization formalism. The color-singlet matrix elements are determined
from electromagnetic decays and from potential models. The color-octet matrix
elements are determined by fitting the CDF data on the cross sections for
Upsilon(1S), Upsilon(2S), and Upsilon(3S) at large p_T and the fractions of
Upsilon(1S) coming from chi_b(1P) and chi_b(2P). We use the resulting matrix
elements to predict the cross sections at the Tevatron for the spin-singlet
states eta_b(nS) and h_b(nP). We argue that eta_b(1S) should be observable in
Run II through the decay eta_b -> J/psi + J/psi.Comment: 20 pages, 3 figure
Unparticles-Higgs Interplay
We show that scalar unparticles coupled to the Standard Model Higgs at the
renormalizable level can have a dramatic impact in the breaking of the
electroweak symmetry already at tree level. In particular one can get the
proper electroweak scale without the need of a Higgs mass term in the
Lagrangian. By studying the mixed unparticle-Higgs propagator and spectral
function we also show how unparticles can shift the Higgs mass away from its
Standard Model value, \lambda v^2, and influence other Higgs boson properties.
Conversely, we study in some detail how electroweak symmetry breaking affects
the unparticle sector by breaking its conformal symmetry and generating a mass
gap. We also show that, for Higgs masses above that gap, unparticles can
increase quite significantly the Higgs width.Comment: 14 pages, 7 figures, typos correcte
A Descriptive Model of the Offense Process for Female Sexual Offenders
Although considerable efforts have been made to develop and validate etiological models of male sexual offending, no theory is available to guide research or practice with female sexual offenders (FSOs). In this study, the authors developed a descriptive, offense process model of female sexual offending. Systematic qualitative analyses (i.e., grounded theory) of 22 FSOs' offense interviews were used to develop a temporal model documenting the contributory roles of cognitive, behavioral, affective, and contextual factors in female sexual abuse. The model highlights notable similarities and divergences between male and female sexual offenders' vulnerability factors and offense styles. In particular, the model incorporates male co-offender and group co-offender influences and describes how these interact with vulnerability factors to generate female sexual offending. The gender-specific research and clinical implications of the model are discussed
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