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Grand Unification in Higher Dimensions

Description: We have recently proposed an alternative picture for the physics at the scale of gauge coupling unification, where the unified symmetry is realized in higher dimensions but is broken locally by a symmetry breaking defect. Gauge coupling unification, the quantum numbers of quarks and leptons and the longevity of the proton arise as phenomena of the symmetrical bulk, while the lightness of the Higgs doublets and the masses of the light quarks and leptons probe the symmetry breaking defect. Moreov… more
Date: December 10, 2002
Creator: Hall, Lawrence J. & Nomura, Yasunori
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Partner: UNT Libraries Government Documents Department
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The Ags High Power Upgrade Plan.

Description: BNL could provide a Megawatt class neutrino beam from the AGS for very long baseline neutrino experiments. We have studied two possible approaches to upgrade the AGS to 1.0 MW beam power. The first is the linac option, comprising a new superconducting linac injector of 1.2 GeV, accelerating 9 x 10{sup 3} proton per pulse in the AGS to 28 GeV at 2.5 Hz. The second option is to extend the existing 200 MeV linac to 400 MeV. ramp the Booster to 2.5 GeV at 6 Hz. add a new 2.5 GeV accumulator ring in… more
Date: April 8, 2002
Creator: Weng, W. T. & Roser, T.
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Partner: UNT Libraries Government Documents Department
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Detailed spectroscopic analysis of SN 1987A: The distance to the LMC using the SEAM method

Description: Supernova 1987A remains the most well-studied supernova to date. Observations produced excellent broad-band photometric and spectroscopic coverage over a wide wavelength range at all epochs. We model the observed spectra from Day 1 to Day 81 using a hydrodynamical model. We show that good agreement can be obtained at times up to about 60 days, if we allow for extended nickel mixing. Later than about 60 days the observed Balmer lines become stronger than our models can reproduce. We show that th… more
Date: May 21, 2002
Creator: Mitchell, Robert C.; Baron, E.; Branch, David; Hauschildt, Peter H.; Nugent, Peter E.; Lundqvist, Peter et al.
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Partner: UNT Libraries Government Documents Department
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Atmospheric Neutrinos Can Make Beauty Strange

Description: The large observed mixing angle in atmospheric neutrinos, coupled with Grand Unification, motivates the search for a large mixing between right-handed strange and bottom squarks. Such mixing does not appear in the standard CKM phenomenology, but may induce significant b {yields} s transitions through gluino diagrams. Working in the mass eigenbasis, we show quantitatively that an order one effect on CP violation in B{sub d}{sup 0} {yields} {pi}K{sub S} is possible due to a large mixing between r… more
Date: December 1, 2002
Creator: Harnik, Roni; Larson, Daniel T.; Murayama, Hitoshi & Pierce, Aaron
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Partner: UNT Libraries Government Documents Department
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Introductory remarks: Reflections on the reasons for building accelerators

Description: This is a good occasion, just when Fermilab is considering whether or not to build a new machine, and just when KEK/JAERI has initiated a new machine, to look back in history and review the reasons given--even believed by the proponents--for constructing a new accelerator, and then look at what really happened. Now there is a fair amount of history, more than 80 years of it, as accelerators go back to the 20's. Perhaps it is useful to categorize accelerators into groups. The first might be Ener… more
Date: April 2, 2002
Creator: Sessler, Andrew M.
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Partner: UNT Libraries Government Documents Department
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The new cosmology

Description: Over the past three years we have determined the basic features of our Universe. It is spatially flat; accelerating; comprised of 1/3 a new form of matter, 2/3 a new form of energy, with some ordinary matter and a dash of massive neutrinos; and it apparently began from a great burst of expansion during which quantum noise was stretched to astrophysical size seeding cosmic structure. This ''New Cosmology'' greatly extends the highly successful hot big-bang model. Now we have to make sense of it.… more
Date: November 19, 2002
Creator: Turner, Michael S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Report of the Snowmass M6 Working Group on high intensity proton sources

Description: The U.S. high-energy physics program needs an intense proton source, a 1-4 MW Proton Driver (PD), by the end of this decade. This machine will serve as a stand-alone facility that will provide neutrino superbeams and other high intensity secondary beams such as kaons, muons, neutrons, and anti-protons (cf. E1 and E5 group reports) and also serve as the first stage of a neutrino factory (cf. M1 group report). It can also be a high brightness source for a VLHC. Based on present accelerator techno… more
Date: August 20, 2002
Creator: Wei, Weiren Chou and J.
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Partner: UNT Libraries Government Documents Department
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Targetry issues for the Fermilab 2-MW neutrino superbeam

Description: The possibility to use various target materials are studied for a 2 MW neutrino superbeam facility that can be built at Fermilab utilizing the Main Injector and a Proton Driver. A simple target solution found is a thick graphite rod taking a broad proton beam.
Date: June 27, 2002
Creator: al., Mikhail A Kostin et
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Partner: UNT Libraries Government Documents Department
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Graphite Sublimation Tests for the Muon Collider/Neutrino Factory Target Development Program

Description: A passively cooled graphite target was proposed for a 1.5 MW neutrino production research facility because of its simplicity and favorable performance as a target material for neutrino production. The conceptual design for the target in the Reference 1 study was a graphite rod 15 mm in diameter by 800 mm long. Figure 1 shows the graphite target rod supported by graphite spokes, which are mounted to a water-cooled stainless steel support tube. The target is radiatively cooled to the water-cooled… more
Date: March 25, 2002
Creator: Haines, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solenoid Magnets for the Front End of a Neutrino Factory.

Description: This report describes the solenoid magnets in the front end (the section between the pion capture solenoid and the linear acceleration section) of the Level 2 study of a neutrino factory. The magnets described in the report start with the decay channel magnets that starts 18 meter downstream from the start of the pion production target. The magnet string ends with the transition solenoids that match the muon beam from the last cooling cell to the superconducting linear accelerator section. All … more
Date: July 1, 2002
Creator: Green, M. A.; Yu, S. S.; Miller, J. R.; Prestemon, S. & Palmer, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Review of North American Neutrino Factory R and D

Description: We report here on the R and D program of the U.S. Neutrino Factory and Muon Collider Collaboration. Our effort includes work on targetry, muon ionization cooling, simulation work, and development of superconducting RF cavities. In addition, we are involved in the international effort toward a Muon Ionization Cooling Experiment (MICE). Recent activities in all these areas will be described.
Date: October 7, 2002
Creator: Zisman, Michael S. & Collaboration, Neutrino Factory and Muon Collider
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Partner: UNT Libraries Government Documents Department
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SO(10) GUT models and their present success in explaining mass and mixing data

Description: Some features of SO(10) GUT models are reviewed, and a number of such models in the literature are compared. While some have been eliminated by recent neutrino data, others are presently successful in explaining the quark and lepton mass and mixing data. A short description of one very predictive model is given which illustrates some of the features discussed. Future tests of the models are pointed out including one which contrasts sharply with those models based on an L{sub e}-L{sub {mu}}-L{su… more
Date: December 13, 2002
Creator: Albright, Carl H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent progress on FFAGS for rapid acceleration

Description: Muon acceleration is one of the more difficult stages to develop for a Neutrino Factory or Muon Collider. The large transverse and longitudinal admittances which must be designed into the system and the rapidity with which acceleration must take place because of muon decay preclude the use of conventional synchrotron design. The approach here employs fixed-field architectures for muon acceleration; specifically, a fixed-field alternating gradient or FFAG accelerator. This paper explores the FFA… more
Date: December 10, 2002
Creator: Johnstone, C. & Koscielniak, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dark matter and dark energy: The critical questions

Description: Stars account for only about 0.5% of the content of the Universe; the bulk of the Universe is optically dark. The dark side of the Universe is comprised of: at least 0.1% light neutrinos; 3.5% {+-} 1% baryons; 29% {+-} 4% cold dark matter; and 66% {+-} 6% dark energy. Now that we have characterized the dark side of the Universe, the challenge is to understand it. The critical questions are: (1) What form do the dark baryons take? (2) What is (are) the constituent(s) of the cold dark matter? (3)… more
Date: November 19, 2002
Creator: Turner, Michael S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam simulation tools for GEANT4 (and neutrino source applications)

Description: Geant4 is a tool kit developed by a collaboration of physicists and computer professionals in the High Energy Physics field for simulation of the passage of particles through matter. The motivation for the development of the Beam Tools is to extend the Geant4 applications to accelerator physics. Although there are many computer programs for beam physics simulations, Geant4 is ideal to model a beam going through material or a system with a beam line integrated to a complex detector. There are ma… more
Date: December 3, 2002
Creator: V.Daniel Elvira, Paul Lebrun and Panagiotis Spentzouris
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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NEUTRINO SUPER BEAM FACILITY FOR A LONG BASELINE EXPERIMENT FROM BNL TO HOMESTAKE.

Description: An upgrade to the BNL Alternate Gradient Synchrotron (AGS) could produce a very intense proton source at a relatively low cost. Such a proton beam could be used to generate a conventional neutrino beam with a significant flux at large distances from the laboratory. This provides the possibility of a very long baseline neutrino experiment at the Homestake mine. The construction of this facility would allow a program of experiments to study many of the aspects of neutrino oscillations including C… more
Date: October 21, 2002
Creator: Kahn, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Graphite Sublimation Tests for the Muon Collider/Neutrino Factory Target Development Program

Description: A passively cooled graphite target was proposed for a 1.5 MW neutrino production research facility because of its simplicity and favorable performance as a target material for neutrino production (Ref. 1). The conceptual design for the target in the Reference 1 study was a graphite rod 15 mm in diameter by 800 mm long. Figure 1 shows the graphite target rod supported by graphite spokes, which are mounted to a water-cooled stainless steel support tube. The target is radiatively cooled to the wat… more
Date: February 7, 2002
Creator: Haines, JR
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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XXXVIIieme Rencontres de Moriond: Electroweak 2002 conference summary

Description: A substantial body of data is described by the Standard Model of particle physics. However the description is far from perfect and there is a growing number of internal inconsistencies. These fall short of qualifying as discoveries; nevertheless, examination of their merits is both interesting and worthwhile. The existence of three families of quarks and leptons is not understood. There are new data, especially from the B factories; the latter are shining new light on the problem. From several … more
Date: July 2, 2002
Creator: Montgomery, Hugh E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ATLAS DISCOVERY POTENTIAL FOR A HEAVY CHARGED HIGGS BOSON.

Description: The sensitivity of the ATLAS detector to the discovery of a heavy charged Higgs boson is presented. Assuming a heavy SUSY spectrum, the most promising channels above the top quark mass are H{sup {+-}} {yields} tb and h{sup {+-}} {yields} {tau}{sup {+-}}{nu}{sub {tau}} which provide coverage in the low and high tan {beta} regions up to {approx} 600 GeV. The achievable precisions on the charged Higgs mass and tan {beta} determination are also discussed. The H{sup {+-}} {yields} W{sup {+-}}h{sup 0… more
Date: February 1, 2002
Creator: Assamagan, Kétévi Adiklé; Coadou, Yann & Deandrea, Aldo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MUON EDM Experiment Using Stage II of the Neutrino Factory

Description: During the second stage of a future neutrino factory unprecedented numbers of bunched muons will become available. The cooled medium-energy muon beam could be used for a high sensitivity search for an electric dipole moment (EDM) of the muon with a sensitivity better than 10{sup -24}e {center_dot} cm. This will make the sensitivity of the EDM experiment to non-standard physics competitive and in many models more sensitive than the present limits on edms of the electron and nucleons. The experim… more
Date: July 1, 2002
Creator: Fernow, R. C.; Gallardo, J. C.; Morse, W. M. & Semertzidis, Y. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Making sense of the new cosmology

Description: Over the past three years we have determined the basic features of the Universe--spatially flat; accelerating; comprised of 1/3 a new form of matter, 2/3 a new form of energy, with some ordinary matter and a dash of massive neutrinos; and apparently born from a burst of rapid expansion during which quantum noise was stretched to astrophysical size seeding cosmic structure. The New Cosmology greatly extends the highly successful hot big-bang model. Now we have to make sense of all this: What is … more
Date: November 19, 2002
Creator: Turner, Michael S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Progress in Six Dimensional Ionization Cooling Techniques for Muon Based Machines.

Description: Ionization cooling is an essential component of a neutrino factory or a muon collider. Ionization cooling in the transverse dimensions is reasonably straightforward, and has been incorporated in published neutrino factory studies. Achieving cooling in the longitudinal dimensions is more difficult, but has the potential to greatly improve the performance of neutrino factories, and is essential to muon colliders. Much progress has recently been made in describing ring cooling lattices which achie… more
Date: June 3, 2002
Creator: Kim, K. J.; Wang, C. X.; Berg, J. S.; Fernow, R.; Kirk, H.; Palmer, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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VERY LONG BASELINE NEUTRINO OSCILLATION EXPERIMENTS FOR PRECISE MEASURMENTS OF OSCILLATION PARAMETERS AND SEARCH FOR N MU YIELDS N EPSILON.

Description: Brookhaven National Laboratory and collaborators started a neutrino working group to identify new opportunities in the field of neutrino oscillations and explore how our laboratory facilities can be used to explore this field of research. The memo to the working group and the charge are included in Appendix I. This report is the result of the deliberations of the working group. Previously, we wrote a letter of intent to build a new high intensity neutrino beam at BNL. A new intense proton beam … more
Date: October 18, 2002
Creator: Diwan, M.; Marciano, W.; Weng, W.; Beavis, D.; Brennan, M.; Chen, M. C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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