123519082
MINOS the main injector neutrino oscillation search
Abstract MINOS is a neutrino experiment which uses a beam of neutrinos from the Fermilab main injector to determine the parameters of possible neutrino oscillations. It consists of two detectors: a near detector to measure the beam composition at the production site and a far detector 730 km away to re-measure the composition and detect any oscillation which may have occurred. MINOS is a tracking calorimeter build from solid plastic scintillators to measure all the neutrino interactions.
14130059
Long baseline neutrino oscillation review
This article will summarise the status of current and future long baseline neutrino oscillation experiments.
122204341
New results from the MINOS experiment
MINOS is a long baseline neutrino oscillation experiment. Protons from the Fermilab main injector are used to generate an intense muon neutrino beam, which is directed at the Soudan underground laboratory in Northern Minnesota. The result from two years of running with a total exposure of 2.5 × 1020 protons on target from the NuMI beam is reported. We made a preliminary measurement by comparing the event rate and energy spectra of charge current muon neutrino interactions in the two detectors, which are 1 and 735 km from the neutrino production target. The data is consistent with vμ to v oscillation in the so-called atmospheric parameter range with δm2 = (2.38+0.20-0.16) × 10-3 eV2 and sin22Θ = 1-0.08.
15024169
Fine and hyperfine structure in different bound systems
We demonstrate that the generalized Gell-Mann–Low theorem permits for a systematic expansion around the nonrelativistic limit when applied to bound states in the Wick-Cutkosky model, Yukawa theory, and QED (in Coulomb gauge). We apply this expansion to obtain new results for the fine and hyperfine structure of bound states in the cases of the Wick-Cutkosky model and Yukawa theory, and reproduce correctly the fine and hyperfine structure of hydrogenic systems.
123469144
THE GENERALIZED GELL-MANN–LOW THEOREM FOR BOUND STATES IN QED: A FIRST EXPLORATION
122569817
Fermion damping and reaction rates in hot gauge theories
We examine the relation between the damping rate of a fermionic mode propagating in a hot QED or QCD plasma, and the corresponding reaction rate. We show that these two quantities should be equal provided the reaction rate is calculated using properly normalized wave functions for the mode in the medium. We use finite temperature cutting rules to identify the different terms in the expression for the damping rate with physical processes in the plasma.
125415220
Hamiltonian approach to Yang-Mills theory in Coulomb gauge
SUMMARY AND CONCLUSIONS In my talk I have discussed recent results obtained in the Hamilton approach to Yang-Mills theory in Coulomb gauge. Using ghost dominance, an infrared analysis of theSchwinger-Dyson equations has revealed both quark and gluon conﬁnement. The gluonenergy is infrared diverging implying the absence of asymptotic gluon states from thephysical spectrum, and the static Coulomb potential is linearly rising. These results areconﬁrmed by a full numerical solution of the Schwinger-Dyson equations. While theghost-gluon vertex remains basically unrenormalized and in particular becomes the bareone when the ghost momentum vanishes, the three-gluon vertex is strongly infrareddivergent. As a ﬁrst non-trivial test of the variationally determined vacuum wave func-tional, we have calculated ’t Hooft’s disorder parameter choosing the renormalizationconstants of the gap equation in such a way that the wave functional reproduces in theinfrared the strong coupling limit. Then the ’t Hooft loop shows indeed a perimeter law,indicating a conﬁning vacuum.
189910828
Flow equations for the relevant part of the pure Yang-Mills action
Wilson’s exact renormalization group equations are derived and integrated for the relevant part of the pure Yang-Mills action. We discuss in detail how modified Slavnov-Taylor identities control the breaking of BRST invariance in the presence of a finite infrared cutoffk through relations among different parameters in the effective action. In particular they imply a nonvanishing gluon mass term for nonvanishingk. The requirement of consistency between the renormalization group flow and the modified Slavnov-Taylor identities allows to control the self-consistency of truncations of the effective action.