135 research outputs found
High Q^2 Deep Inelastic Scattering at HERA
High Q^2 NC and CC cross-sections as measured at HERA can give information on
two distinct areas of current interest. Firstly, supposing that all the
electroweak parameters are well known, these cross-sections may be used to give
information on parton distributions at high x and high Q^2. Secondly, supposing
that parton distributions are well known, after evolution in Q^2 from the
kinematic regime where they are already measured, these cross-sections can be
used to give information on electroweak parameters in a process where the
exchanged boson is `spacelike' rather than `timelike'. WG1 addressed itself to
clarifying the limits of our present and possible future knowledge on both
these areas.Comment: 26 pages, 12 figures. Uses iopart.cls, iopart12.clo, axodraw.sty.
Report of WG1 of the 3rd UK Phenomenology Workshop on HERA Physics, Durham
1998. To be published in Journal of Physics
How to pin down the CP quantum numbers of a Higgs boson in its tau decays at the LHC
We investigate how the CP quantum numbers of a neutral Higgs boson or
spin-zero resonance, produced at the CERN Large Hadron Collider, can be
determined in its tau-pair decay mode. We use a method developed in an earlier
paper based on the distributions of two angles and apply it to the major
1-prong tau decays. We show for the resulting dilepton, lepton-pion, and
two-pion final states that appropriate selection cuts significantly enhance the
discriminating power of these observables. From our analysis we conclude that,
provided a Higgs boson will be found at the LHC, it appears feasible to collect
the event numbers needed to discriminate between a CP-even and -odd Higgs boson
and/or between Higgs boson(s) with CP-conserving and CP-violating couplings
after several years of high-luminosity runs.Comment: 23 pages, 12 figures; Several sentences and references adde
Comparison of measured and modeled temporal coherence of sound near 75 Hz and 3683 km in the Pacific Ocean
Electroweak corrections to production at hadron colliders
In this paper we present the results from a calculation of the full
electroweak one-loop corrections for vector-boson pair production at
hadron colliders. The cases of proton--antiproton as well as proton--proton
collisions, at the Tevatron and the LHC, respectively, are considered. Results
are presented for the distribution of the invariant mass and for the
transverse momentum of the final-state photon. The higher-order electroweak
effects are numerically significant, in particular for probing possible
anomalous gauge-boson couplings
Probability distributions for locations of calling animals, receivers, sound speeds, winds, and data from travel time differences
A decade of acoustic thermometry in the North Pacific Ocean
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94643/1/jgrc11250.pd
Production of Doubly Charged Higgs Bosons at Linear e-e- Colliders
Production of doubly charged Higgs bosons via the s-channel process e-e- ->
H-- -> l-l- at future linear collider energies is studied by taking into
account initial state radiation (ISR) and beamstrahlung (ISR + BS), final state
radiation (FSR) and detector smearing effects. The discovery bounds of lepton
flavour conserving and violating couplings are obtained for doubly charged
Higgs bosons. It is found that future linear colliders with centre of mass
energies and will be able to probe the doubly charged Higgs bosons with
diagonal couplings down to 10^-4 and 10^-3, respectively.Comment: 22 pages, 12 figures, 4 table
Higher-order QED corrections to W-boson mass determination at hadron colliders
The impact of higher-order final-state photonic corrections on the precise
determination of the W-boson mass at the Tevatron and LHC colliders is
evaluated. In the presence of realistic selection criteria, the shift in the W
mass from a fit to the transverse mass distribution is found to be about 10 MeV
in the channel and almost negligible in the
channel. The calculation, which is implemented in a Monte Carlo event generator
for data analysis, can contribute to reduce the uncertainty associated to the W
mass measurement at future hadron collider experiments.Comment: 9 pages, 2 figures, 1 table, RevTe
Electroweak radiative corrections to deep-inelastic neutrino scattering - implications for NuTeV ?
We calculate the O(alpha) electroweak corrections to charged- and
neutral-current deep-inelastic neutrino scattering off an isoscalar target. The
full one-loop-corrected cross sections, including hard photonic corrections,
are evaluated and compared to an earlier result which was used in the NuTeV
analysis. In particular, we compare results that differ in input-parameter
scheme, treatment of real photon radiation and factorization scheme. The
associated shifts in the theoretical prediction for the ratio of neutral- and
charged-current cross sections can be larger than the experimental accuracy of
the NuTeV result.Comment: 19 pages late
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