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Neutrino fluctuat nec mercitur: are fossil neutrinos detectable

Description: A brief report is presented on the question whether light (few eV to approx. 100 eV) neutrinos left over from the big bang are detectable. The answer is perhaps. If the weak current of leptons, like those of quarks, are not diagonal in mass eigenstates, a neutrino will decay into a lighter neutrino and a monochromatic photon. The corresponding photon line may be detectable provided: neutrinos are heavy enough to participate in galaxy clustering and neutrino lifetimes are, as in some weak intera… more
Date: April 1, 1980
Creator: De Rujula, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aspects of strangeness production with 15 -- 30 GeV proton beams

Description: We discuss the spectrum of physics questions related to strangeness which could be addressed with a 15--30 GeV proton storage ring. We focus on various aspects of strangeness production, including hyperon production in pp collisions, studies of hyperon-nucleon scattering, production of hyper-fragments in p-nucleus collisions, and hyperon spin observables in inclusive production.
Date: April 1, 1992
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Glueballs in the reaction. pi. /sup -/p. -->. phi phi n at 22 GeV/c

Description: The current favorite candidate theory of strong interactions is Quantum Chromodynamics. In this theory, bound states of two or more gluons, called glueballs, must exist. Experimentally, the detection of glueballs (all of which are massive enough to decay quickly to ordinary q anti q hadrons) is complicated by the lack of any explicit signature. The calculation of the mass of the low-lying glueballs by lattice gauge methods and the MIT bag model at present give only a rough guide to experimental… more
Date: January 1, 1983
Creator: Love, W.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nuclear momentum distribution and relativistic heavy-ion reactions

Description: In terms of a direction fragmentation process and a hard-scattering process, the proton-inclusive data for the reaction ..cap alpha.. + /sup 12/C ..-->.. p + X were successfully analyzed. The extracted semiempirical momentum distribution indicates possible evidence of nuclear correlations and final-state interactions. 4 figures.
Date: January 1, 1980
Creator: Wong, C.Y. & Blankenbecler, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scaling phenomenon in relativistic nucleus-nucleus collisions

Description: New scaling variables for proton and pion production in relativistic nucleus-nucleus collisions are introduced which are the generalizations of the Feynmann scaling variable. They allow a simple description of the cross sections at forward and backward angles. 2 figures.
Date: January 1, 1980
Creator: Wong, C.Y. & Blankenbecler, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of the Semileptonic Decays B->D tau nu and B->D* tau nu

Description: The authors present measurements of the semileptonic decays B{sup -} {yields} D{sup 0} {tau}{sup -} {bar {nu}}{sub {tau}}, B{sup -} {yields} D*{sup 0} {tau}{sup -}{bar {nu}}{sub {tau}}, {bar B}{sup 0} {yields} D{sup +} {tau}{sup -} {bar {nu}}{sub {tau}}, and {bar B}{sup 0} {yields} D*{sup +} {tau}{sup -}{bar {nu}}{sub {tau}}, which are sensitive to non-Standard Model amplitudes in certain scenarios. The data sample consists of 232 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected wit… more
Date: February 23, 2009
Creator: Aubert, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A search for particle dark matter using cryogenic germanium and silicon detectors in the one- and two- tower runs of CDMS-II at Soudan

Description: Images of the Bullet Cluster of galaxies in visible light, X-rays, and through gravitational lensing confirm that most of the matter in the universe is not composed of any known form of matter. The combined evidence from the dynamics of galaxies and clusters of galaxies, the cosmic microwave background, big bang nucleosynthesis, and other observations indicates that 80% of the universe's matter is dark, nearly collisionless, and cold. The identify of the dar, matter remains unknown, but weakly … more
Date: April 1, 2008
Creator: Ogburn, Reuben Walter, IV
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Missing Mass Spectra from p p ---> p X from 9-GeV/c to 300-GeV/c

Description: Missing mass spectra were obtained by measuring recoil protons from the reaction p + p {yields} p + X in the Jacobian peak region at |t| = 0.175 and 0.25 (GeV/c){sup 2}. The incident momentum range from 9 to 300 GeV/c was covered continuously by taking data during the acceleration ramp of the Fermi National Accelerator Laboratory machine. Our missing mass range varied from 1.5 to 8.5 GeV and we observed the well known N*(1688) and N*(2l90) but no significant structures at higher mass.
Date: June 1, 1974
Creator: Abe, K.; Alspector, J.; Bomberowitz, R.; Cohen, K.J.; De Lillo, T.; Harrison, W.C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for Invisible Decays of a Light Scalar in Radiative Transitions Y(3S)->gamma A0

Description: We search for a light scalar particle produced in single-photon decays of the {Upsilon}(3S) resonance through the process {Upsilon}(3S) {yields} {gamma} + A{sup 0}, A{sup 0} {yields} invisible. Such an object appears in Next-to-Minimal Supersymmetric extensions of the Standard Model, where a light CP-odd Higgs boson naturally couples strongly to b-quarks. If, in addition, there exists a light, stable neutralino, decays of A{sup 0} could be preferentially to an invisible final state. We search f… more
Date: November 5, 2008
Creator: Aubert, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Charmed meson physics accessible to an L = 10/sup 33/ cm/sup /minus/2/ sec/sup /minus/1/ e/sup +/e/sup /minus// collider operating near charm threshold

Description: In this report, the potential for dedicated charmed D/sup 0/, D/sup +/ and D/sub s/ meson physics in a high-luminosity e/sup +/e/sup /minus// collider operated near charm threshold is explored. The construction of such a high-luminosity collider or Tau-Charm Factory in conjunction with a new detector whose design draws heavily on the extensive operational experience of previous detectors at SPEAR, could achieve three orders-of-magnitude improvement in sensitivity in most areas of charmed meson … more
Date: June 1, 1989
Creator: Schindler, R. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Glueballs in the reaction. pi. /sup -/p. -->. phi phi n

Description: The BNL/CCNY group has observed and performed a partial wave analysis on 1203 (22 GeV) ..pi../sup -/p ..-->.. phi phi n events. The OZI suppression has been found to be almost completely broken down. The phi phi spectrum is found to be composed almost entirely of two new resonances, the g/sub T/(2160) and the g/sub T/(2320) with K/sup G/J/sup PC/ = 0/sup +/2/sup + +/. For g/sub T/ (2160), M = 2.16 +- 0.05 GeV, and GAMMA = 0.31 +- 0.07 GeV. For g/sub T/(2320), M = 2.32 +- 0.04, and GAMMA = 0.22 … more
Date: January 1, 1983
Creator: Lindenbaum, S. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Searching for Supersymmetry at the SSC

Description: Supersymmetric (SUSY) models have generated increasing amounts of attention in recent years as a means of understanding the roles of scalar particles in a field theory. Since supersymmetry connects fermions and bosons in a natural framework, theorists are hopeful that it will reduce the freedom surrounding fermions and scalars in the Weinberg-Salam model. No satisfactory model exists at this time, but the structure of the supersymmetric algebra is sufficiently attractive to warrant a serious st… more
Date: October 1, 1984
Creator: Dawson, S.; Savoy-Navarro, A.; Alverson, G.; Barnett, R.M.; Fernandez, E.; Freeman, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparison of the differential cross-sections for. pi. /sup -/p. -->. eta 'n and. pi. /sup -/p. -->. eta n at 8. 45 GeV/c

Description: The ratio R of the differential cross sections for ..pi../sup -/p eta'n and ..pi../sup -/p eta n was measured with high statistics and small systematic errors at 8.45 GeV/c. R is generally interpreted as the relative content of nonstrange, ground-state quarks in eta' and eta. It is found that R decreases with increasing t; however, extrapolation to t = 0 gives R(0) = 0.672 +- 0.032 (statistical) +- 0.047 (systematic) for the dominant spin flip cross sections, and R(0) = 0.500 +- 0.085 +- 0.035 … more
Date: January 1, 1979
Creator: Stanton, N.R.; Edwards, K.W. & Legacey, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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D0 Project at Fermilab

Description: The D0 Project will explore 2 TeV anti pp collisions at Fermilab using a highly optimized calorimetric detector, to elucidate the new physics coming out of the SppS, and to explore the new higher energy regime. The design and physics potential of the detector system are described.
Date: January 1, 1984
Creator: Marx, M.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Searches for massive neutrinos in nuclear beta decay

Description: The status of searches for massive neutrinos in nuclear beta decay is reviewed. The claim by an ITEP group that the electron antineutrino mass > 17eV has been disputed by all the subsequent experiments. Current measurements of the tritium beta spectrum limit m{sub {bar {nu}}e} < 10 eV. The status of the 17 keV neutrino is reviewed. The strong null results from INS Tokyo and Argonne, and deficiencies in the experiments which reported positive effects, make it unreasonable to ascribe the spectral… more
Date: October 1, 1992
Creator: Jaros, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aspects of strangeness production with 15 -- 30 GeV proton beams

Description: We discuss the spectrum of physics questions related to strangeness which could be addressed with a 15--30 GeV proton storage ring. We focus on various aspects of strangeness production, including hyperon production in pp collisions, studies of hyperon-nucleon scattering, production of hyper-fragments in p-nucleus collisions, and hyperon spin observables in inclusive production.
Date: April 1, 1992
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Redesign of the CKM RICH velocity spectrometers for use in a 1/4 GHz un separated beam

Description: I report here a redesign of the CKM RICH velocity spectrometers for use in a 1/4 GHz unseparated beam adapted to the KTeV beam line and detector hall at Fermilab (P940). The redesigns reported here comprise modest modification to the original designs for CKM(E921) to accommodate the change in beam flux, momentum, and momentum bite of the primary beam. The ultimate performance of the velocity spectrometer systems, as quantified by the missing mass squared resolution for K{sup +} {yields} {pi}{su… more
Date: January 1, 2004
Creator: Cooper, Peter S. & Engelfried, Jurgen
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Observation of the Decay B- --> Ds(*) K- l- nubar

Description: We report the observation of the decay B{sup -} {yields} D{sub s}{sup (*)+} K{sup -}{ell}{sup -}{bar {nu}}{sub {ell}} based on 342 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} storage rings at SLAC. A simultaneous fit to three D{sub s}{sup +} decay chains is performed to extract the signal yield from measurements of the squared missing mass in the B meson decay. We observe the decay B{sup -} {yields} D{sub s}{sup (*)+} K{sup … more
Date: August 12, 2011
Creator: del Amo Sanchez, P.; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of the neutral meson spectrum near 1000 MeV

Description: The nonstrange neutral meson spectrum from 0.75 to 1.23 GeV/c was studied in the reaction negative pion plus proton goes to neutron plus missing mass at incident beam momenta of 1.98 and 2.41 GeV/c. Neutrons produced by beam interactions in the liquid hydrogen target were detected in the near forward direction in an array of plastic scintillation counters. The missing mass of the remaining particles produced in the final state was determined by a measurement of the neutron time-of-flight. In th… more
Date: December 1, 1975
Creator: Leeper, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nearly Supersymmetric Dark Atoms

Description: Theories of dark matter that support bound states are an intriguing possibility for the identity of the missing mass of the Universe. This article proposes a class of models of supersymmetric composite dark matter where the interactions with the Standard Model communicate supersymmetry breaking to the dark sector. In these models supersymmetry breaking can be treated as a perturbation on the spectrum of bound states. Using a general formalism, the spectrum with leading supersymmetry effects is … more
Date: August 12, 2011
Creator: Behbahani, Siavosh R.; Jankowiak, Martin; /SLAC /Stanford U., ITP; Rube, Tomas; /Stanford U., ITP; Wacker, Jay G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Direct search for dark matter

Description: Dark matter is hypothetical matter which does not interact with electromagnetic radiation. The existence of dark matter is only inferred from gravitational effects of astrophysical observations to explain the missing mass component of the Universe. Weakly Interacting Massive Particles are currently the most popular candidate to explain the missing mass component. I review the current status of experimental searches of dark matter through direct detection using terrestrial detectors.
Date: December 1, 2009
Creator: Yoo, Jonghee
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multiparticle production in pi- p collisions at 100 GeV

Description: The authors propose an experiment to examine in some detail the multiple production of pions in {pi}-p collisions at 100 GeV. In the experiment they identify and measure the proton recoiling from the collision and then measure the multiplicity and the momentum distribution of the accompanying mesonic shower. They propose to measure: (1) the elastic {pi}p cross-section over a wide range of momentum transfer 0.1 {le} -t {le} 15 GeV{sup 2} or until the cross-section d{sigma}/dt drops below 10{sup … more
Date: June 1, 1970
Creator: Anderson, H. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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