Beam halo monitoring at CDF Unel, Muge Karagoz; Tesarek, Richard J.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2003, Letnik:
506, Številka:
1
Journal Article
Recenzirano
Odprti dostop
Losses from the proton and antiproton beams of the Fermilab Tevatron have been shown to produce a halo which contribute to backgrounds to physics signals in the Collider Detector at Fermilab (CDF). ...To provide a measure of the beam halo and losses, we have installed arrays of scintillation counters on both sides of the CDF detector. We describe here the physical configuration of these counters, their implementation and performance within the Fermilab Accelerator Control Network (ACNET). We show correlations between these new devices and the accelerator operating conditions. We point out that the use of these monitors is leading to improvement in the accelerator operations and reduced backgrounds in CDF.
We evaluate the LHC discovery potential for the fourth family Standard Model neutrinos in the process \(pp\to Z/h\to\nu_{4}{\bar{\nu}_{4}}\to W\mu W\mu\). We show that, depending on their masses, the ...simultaneous discovery of both the Higgs boson and the heavy neutrinos is probable at early stages of LHC operation. Results are presented for both Majorana and Dirac type fourth family neutrinos.
Collider aspects of flavor physics at high Q Lari, T.; Pape, L.; Porod, W. ...
The European physical journal. C, Particles and fields,
09/2008, Letnik:
57, Številka:
1-2
Journal Article, Web Resource
Recenzirano
Odprti dostop
This chapter of the “Flavor in the era of LHC” workshop report discusses flavor-related issues in the production and decays of heavy states at the LHC at high momentum transfer
Q
, both from the ...experimental and the theoretical perspective. We review top quark physics, and discuss the flavor aspects of several extensions of the standard model, such as supersymmetry, little Higgs models or models with extra dimensions. This includes discovery aspects, as well as the measurement of several properties of these heavy states. We also present publicly available computational tools related to this topic.
Phys.Rev.D71:032002,2005 The properties of three-jet events with total transverse energy greater than
320 GeV and individual jet energy greater than 20 GeV have been analyzed and
compared to absolute ...predictions from a next-to-leading order (NLO)
perturbative QCD calculation. These data, of integrated luminosity 86 pb^-1,
were recorded by the CDF Experiment for proton-antiproton collisions at
sqrt{s}=1.8 TeV. This study tests a model of higher order QCD processes that
result in gluon emission and can be used to estimate the magnitude of the
contribution of processes higher than NLO. The total cross section is measured
to be 466 +/- 3(stat.)^{+207}_{-70}(syst.) pb. The differential cross section
is furthermore measured for all kinematically accessible regions of the Dalitz
plane, including those for which the theoretical prediction is unreliable.
While the measured cross section is consistent with the theoretical prediction
in magnitude, the two differ somewhat in shape in the Dalitz plane.
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