30,094 research outputs found
SUSY beyond minimal flavour violation
We review aspects of the phenomenology of the MSSM with non-minimal flavour
violation, including a discussion of important constraints and the sensitivity
to fundamental scales.Comment: Reference added. Matches proceedings versio
Penguin amplitudes in hadronic B decays: NLO spectator scattering
We present results on the NLO (alpha_s^2) spectator-scattering corrections to
the topological penguin amplitudes for charmless hadronic two-body B-decays in
QCD factorization. The corrections can be sizable for the colour-suppressed
electroweak penguin amplitudes alpha_{4,EW}^p but otherwise are numerically
small. Our results explicitly demonstrate factorization at this order. To
assess the phenomenological viability of the framework, we consider
penguin-to-tree ratios in the penguin-dominated pi K system and find agreement
to the expected precision (i.e., a power correction).Comment: 4 pages, 2 figures, talk given at ICHEP 2006, 26 July - 2 August,
Mosco
Next-to-leading order QCD corrections to photon production via weak-boson fusion
We present a calculation of next-to-leading order QCD corrections to gamma jj
production via weak-boson fusion at a hadron collider in the form of a flexible
parton-level Monte Carlo program which allows us to study cross sections and
distributions within experimentally relevant selection cuts. The radiative
corrections are found to be moderate with residual scale uncertainties being
considerably improved beyond tree level. The sensitivity of the reaction to
anomalous W+ W- gamma couplings is investigated.Comment: 14 pages, 8 figure
Future Spin Physics at JLab; 12 GeV and Beyond
The project to upgrade the CEBAF accelerator at Jefferson Lab to 12 GeV is
presented. Most of the research program supporting that upgrade, will require a
highly polarized beam, as will be illustrated by a few selected examples. To
carry out that research program will require an extensively upgraded
instrumentation in two of the existing experimental halls and the addition of a
fourth hall. The plans for a high-luminosity electron-ion collider are briefly
discussed.Comment: 6 pages; 2 figures; submitted to the Proceedings of SPIN200
Nucleon Electromagnetic Form Factors
A review of data on the nucleon electromagnetic form factors in the
space-like region is presented. Recent results from experiments using polarized
beams and polarized targets or nucleon recoil polarimeters have yielded a
significant improvement on the precision of the data obtained with the
traditional Rosenbluth separation. Future plans for extended measurements are
outlined.Comment: 12 pages, 6 figures, Talk presented at the Bates25 Symposiu
Nucleon Form Factor Experiments and the Pion Cloud
The experimental and theoretical status of elastic electron scattering from
the nucleon is reviewed. A wealth of new data of unprecedented precision,
especially at small values of the momentum transfer, in parallel to new
theoretical insights, has allowed sensitive tests of the influence of the
pionic cloud surrounding the nucleon.Comment: 9 pages; 4 figures; submitted to the Proceedings of the Shape of the
Nucleo
- …