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50 papers · 2 filters
The Soft Supersymmetry-Breaking Lagrangian: Theory and Applications
D. J. H. Chung, L. L. Everett, G. L. Kane +3
After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of th…
Effective theory approach to unstable particle production
M. Beneke, A. P. Chapovsky, A. Signer +1
Using the hierarchy of scales between the mass, , and the width, , of a heavy, unstable particle we construct an effective theory that allows calculations for resonant proces…
Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA
Stephen Mrenna, Peter Richardson
We report on our exploration of matching matrix element calculations with the parton-shower models contained in the event generators HERWIG and Pythia. We describe results for e+e-…
B_s-B_s-bar mixing in an SO(10) SUSY GUT model
Sebastian Jager, Ulrich Nierste
We perform a renormalisation group analysis of the SO(10) model proposed by Chang, Masiero and Murayama, which links the large atmospheric neutrino mixing angle to loop-induced tra…
Unified Graphical Summary of Neutrino Mixing Parameters
Olga Mena, Stephen Parke
The neutrino mixing parameters are presented in a number of different ways by the various experiments, e.g. SuperKamiokande, K2K, SNO, KamLAND and Chooz and also by the Particle Da…
Two-loop scalar self-energies in a general renormalizable theory at leading order in gauge couplings
Stephen P. Martin
I present results for the two-loop self-energy functions for scalars in a general renormalizable field theory, using mass-independent renormalization schemes based on dimensional r…
Complete NNLO QCD Analysis of B -> X_s l^+ l^- and Higher Order Electroweak Effects
Christoph Bobeth, Paolo Gambino, Martin Gorbahn +1
We complete the next-to-next-to-leading order QCD calculation of the branching ratio for B -> X_s l^+ l^- including recent results for the three-loop anomalous dimension matrix and…
Neutrino Mixing and Cosmology
Nicole F. Bell
We review the consequences of neutrino mixing in the early universe. For both active-sterile mixing or mixing between three active neutrinos only, the consequences of oscillations…
Precise Prediction for the W-Boson Mass in the Standard Model
M. Awramik, M. Czakon, A. Freitas +1
The presently most accurate prediction for the W-boson mass in the Standard Model is obtained by combining the complete two-loop result with the known higher-order QCD and electrow…
Analytic Estimates of the QCD Corrections to Neutrino-Nucleus Scattering
Bogdan A. Dobrescu, R. Keith Ellis
We study the QCD corrections to neutrino deep-inelastic scattering on a nucleus, and analytically estimate their size. For an isoscalar target, we show that the dominant QCD correc…
Slepton Production at e+e- and e-e- Linear Colliders
A. Freitas, A. von Manteuffel, P. M. Zerwas
High-precision analyses are presented for the production of scalar sleptons, selectrons and smuons in supersymmetric theories, at future e+e- and e-e- linear colliders. Threshold p…
Long Baseline Neutrino Oscillations: Parameter Degeneracies and JHF/NuMI Complementarity
Hisakazu Minakata, Hiroshi Nunokawa, Stephen Parke
A summary of the parameter degeneracy issue for long baseline neutrino oscillations is presented and how a sequence of measurements can be used to resolve all degeneracies. Next, a…
Lower limits on R-parity-violating couplings in supersymmetric models with light squarks
Edmond L. Berger, Zack Sullivan
We interpret the results of searches for strongly interacting massive particles to place absolute lower limits on R-parity-violating couplings for squarks with mass (m_\tilde{q}) b…
GADZOOKS! Antineutrino Spectroscopy with Large Water Cerenkov Detectors
John F. Beacom, Mark R. Vagins
We propose modifying large water Čerenkov detectors by the addition of 0.2% gadolinium trichloride, which is highly soluble, newly inexpensive, and transparent in solution. Since G…
Sensitivity to and in the Decaying Astrophysical Neutrino Scenario
John F. Beacom, Nicole F. Bell, Dan Hooper +2
We have previously shown that the decay of high-energy neutrinos from distant astrophysical sources would be revealed by flavor ratios that deviate strongly from the $ϕ_{ν_e}:ϕ_{ν_…
Higgsless Theory of Electroweak Symmetry Breaking from Warped Space
Yasunori Nomura
We study a theory of electroweak symmetry breaking without a Higgs boson, recently suggested by Csaki et al. The theory is formulated in 5D warped space with the gauge bosons and m…
Coherent Phase Argument for Inflation
Scott Dodelson
Cosmologists have developed a phenomenally successful picture of structure in the universe based on the idea that the universe expanded exponentially in its earliest moments. There…
The Higgs Mass Bound in Gauge Extensions of the Minimal Supersymmetric Standard Model
Puneet Batra, Antonio Delgado, David E. Kaplan +1
The minimal supersymmetric standard model, and extensions, have stringent upper bounds on the mass of the lightest Higgs boson if perturbativity up to the Planck scale is assumed.…
CP asymmetry in flavour-specific B decays beyond leading logarithms
M. Beneke, G. Buchalla, A. Lenz +1
We compute next-to-leading order QCD corrections to the CP asymmetry a_{fs} = Im(Gamma_{12}/M_{12}) in flavour-specific B_{d,s} decays such as B_d->X l nu or B_s->D^-_s pi^+. The c…
Invisible Z-Boson Decays at e+e- Colliders
Marcela Carena, Andre de Gouvea, Ayres Freitas +1
The measurement of the invisible Z-boson decay width at e+e- colliders can be done "indirectly", by subtracting the Z-boson visible partial widths from the Z-boson total width, or…
Next-to-leading order QCD predictions for W+2j and Z+2j production at the CERN LHC
John Campbell, R. K. Ellis, D. Rainwater
We present cross sections and differential distributions for QCD radiative corrections to the QCD processes pp -> W+2j and pp -> Z+2j at the CERN LHC. Calculations are performed wi…
Test of Gauge-Yukawa Unification
Ilia Gogoladze, Yukihiro Mimura, S. Nandi +1
Recently it has been proposed that, in the framework of quantum field theory, both the Standard Model gauge and Yukawa interactions arise from a single gauge interaction in higher…
On the reheating stage after inflation
Edward W. Kolb, Alessio Notari, Antonio Riotto
We point out that inflaton decay products acquire plasma masses during the reheating phase following inflation. The plasma masses may render inflaton decay kinematicaly forbidden,…
Evaluation of two-loop self-energy basis integrals using differential equations
Stephen P. Martin
I study the Feynman integrals needed to compute two-loop self-energy functions for general masses and external momenta. A convenient basis for these functions consists of the four…