217 research outputs found
Using the Fermilab Proton Source for a Muon to Electron Conversion Experiment
The Fermilab proton source is capable of providing 8 GeV protons for both the
future long-baseline neutrino program (NuMI), and for a new program of low
energy muon experiments. In particular, if the 8 GeV protons are rebunched and
then slowly extracted into an external beamline, the resulting proton beam
would be suitable for a muon-to-electron conversion experiment designed to
improve on the existing sensitivity by three orders of magnitude. We describe a
scheme for the required beam manipulations. The scheme uses the Accumulator for
momentum stacking, and the Debuncher for bunching and slow extraction. This
would permit simultaneous operation of the muon program with the future NuMI
program, delivering 10^20 protons per year at 8 GeV for the muon program at the
cost of a modest (~10%) reduction in the protons available to the neutrino
program.Comment: 18 pages, 7 figure
Benefits to the U.S. from Physicists Working at Accelerators Overseas
We illustrate benefits to the U.S. economy and technological infrastructure
of U.S. participation in accelerators overseas. We discuss contributions to
experimental hardware and analysis and to accelerator technology and
components, and benefits stemming from the involvement of U.S. students and
postdoctoral fellows in global scientific collaborations. Contributed to the
proceedings of the Snowmass 2013 Community Summer Study.Comment: 23 pages, 1 figur
Operation and performance of the new Fermilab Booster H- injection system
The operation and performance of the new, 15 Hz, H{sup -} charge exchange injection system for the FNAL Booster is described. The new system installed in 2006 was necessary to allow injection into the Booster at up to 15 Hz. It was built using radiation hardened materials which will allow the Booster to reliably meet the high intensity and repetition rate requirements of the Fermilab's HEP program. The new design uses three orbit bump magnets (Orbumps) rather than the usual four and permits injection into the Booster without a septum magnet. Injection beam line modification and compensation for the quadrupole gradients of the Orbump magnets is discussed
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Preparations for Muon Experiments at Fermilab
The use of existing Fermilab facilities to provide beams for two muon experiments--the Muon to Electron Conversion Experiment (Mu2e) and the New g-2 Experiment--is under consideration. Plans are being pursued to perform these experiments following the completion of the Tevatron Collider Run II, utilizing the beam lines and storage rings used today for antiproton accumulation without considerable reconfiguration
New physics effects in the rare B_s --> \gamma \ell^+ \ell^- decays with polarized photon
Using the most general model independent form of the effective Hamiltonian,
the rare B_s --> \gamma \ell^+ \ell^- decays are studied by taking into account
the polarization of the photon. The total and the differential branching ratios
for these decays, when photon is in the positive and negative helicity states,
are presented. Dependence of these observables on the new Wilson coefficients
are studied. It is also investigated the sensitivity of "photon polarization
asymmetry" in B_s --> \gamma \ell^+ \ell^- decays to the new Wilson
coefficients. It has been shown that all these physical observables are very
sensitive to the existence of new physics beyond SM and their experimental
measurements can give valuable information about it.Comment: 17 pages, 14 figure
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