72 research outputs found
Leptonic Signals from off-shell Z Boson Pairs at Hadron Colliders
We study the gluon fusion into pairs of off-shell Z bosons and their
subsequent decay into charged lepton pairs at hadron colliders. We do not
restrict the intermediate state Z bosons to the narrow width approximation but
allow for arbitrary invariant masses. We compare the strength of this process
with the known leading order results for q q_bar -> Z Z -> 4 l and for g g -> H
-> Z Z -> 4 l .Comment: 18 p., DESY 94-06
Energy Deposition of Energetic Silicon Atoms Within a Silicon Lattice
The energy dependence of the ionization produced in silicon by recoiling silicon atoms was measured in the 4–54-keV energy interval. It is found that the fraction of the recoil energy that is dissipated as ionization follows an E1/2 dependence which agrees well with the predictions of the theory of Lindhard et al. [Mat. Fys. Medd. 33, 10 (1963)]
SICANE: a Detector Array for the Measurement of Nuclear Recoil Quenching Factors using Monoenergetic Neutron Beam
SICANE is a neutron scattering multidetector facility for the determination
of the quenching factor (ratio of the response to nuclear recoils and to
electrons) of cryogenic detectors used in direct WIMP searches. Well collimated
monoenergetic neutron beams are obtained with inverse (p,n) reactions. The
facility is described, and results obtained for the quenching factors of
scintillation in NaI(Tl) and of heat and ionization in Ge are presented.Comment: 30 pages, Latex, 11 figures. Submitted to NIM
Vector boson pair production at the LHC
We present phenomenological results for vector boson pair production at the
LHC, obtained using the parton-level next-to-leading order program MCFM. We
include the implementation of a new process in the code, pp -> \gamma\gamma,
and important updates to existing processes. We incorporate fragmentation
contributions in order to allow for the experimental isolation of photons in
\gamma\gamma, W\gamma, and Z\gamma production and also account for gluon-gluon
initial state contributions for all relevant processes. We present results for
a variety of phenomenological scenarios, at the current operating energy of
\sqrt{s} = 7 TeV and for the ultimate machine goal, \sqrt{s} = 14 TeV. We
investigate the impact of our predictions on several important distributions
that enter into searches for new physics at the LHC.Comment: 35 pages, 14 figure
Pennsylvania Folklife Vol. 23, Folk Festival Supplement
• Twenty-Five Years of the Folk Festival • Our Farmer\u27s Market • Simple Basics of Egg Decorating • The Folk Festival\u27s Bookstore • Setting Up the Festival • Festival Highlights • Folk Festival Program • Behind the Scenes of We Remain Unchanged • Granges at the Kutztown Folk Festival • How to Design Pressed Flower Pictures • There is This Place - And These People • Metalcrafting at the Festival • Hex Signs and Magical Protection of House and Barn: Folk-Cultural Questionnaire No. 35https://digitalcommons.ursinus.edu/pafolklifemag/1059/thumbnail.jp
Pennsylvania Folklife Vol. 29, No. 4
• The Foods of the Kutztown Folk Festival: Eat as You Go Esse Ve Gestch • Folk Festival Music • Whoa There Nellie • Blacksmiths and Whitesmiths • Scherenschnitte of the Pennsylvania Dutch • Festival Focus • Folk Festival Programs • Glass Blowing: America\u27s First Industry • The Craft of Chair Caning • The Power of the Lullaby: Story of the Kidnapping of Regina Hartman • His First Hundred Years: A Good Foundation! • How Far That Little Candle Throws!https://digitalcommons.ursinus.edu/pafolklifemag/1088/thumbnail.jp
Low-Energy Direct Capture in the 8Li(n,gamma)9Li and 8B(p,gamma)9C Reactions
The cross sections of the 8Li(n,gamma)9Li and 8B(p,gamma)9C capture reactions
have been analyzed using the direct capture model. At low energies which is the
astrophysically relevant region the capture process is dominated by E1
transitions from incoming s-waves to bound p-states. The cross sections of both
mirror reactions can be described simultaneously with consistent potential
parameters, whereas previous calculations have overestimated the capture cross
sections significantly. However, the parameters of the potential have to be
chosen very carefully because the calculated cross section of the
8Li(n,gamma)9Li reaction depends sensitively on the potential strength.Comment: 6 pages, 5 figures, Phys. Rev. C, accepte
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