نتایج جستجو برای: wimp

تعداد نتایج: 1118  

2009
J. D. Vergados

In the present paper we obtain the WIMP velocity distribution in our vicinity starting from spherically symmetric WIMP density profiles in a self consistent way by employing the Eddington approach. By adding a reasonable angular momentum dependent term in the expression of the energy, we obtain axially symmetric WIMP velocity distributions as well. We find that some density profiles lead to app...

Journal: :Physical review letters 2009
V N Lebedenko H M Araújo E J Barnes A Bewick R Cashmore V Chepel A Currie D Davidge J Dawson T Durkin B Edwards C Ghag M Horn A S Howard A J Hughes W G Jones M Joshi G E Kalmus A G Kovalenko A Lindote I Liubarsky M I Lopes R Lüscher K Lyons P Majewski A St J Murphy F Neves J Pinto da Cunha R Preece J J Quenby P R Scovell C Silva V N Solovov N J T Smith P F Smith V N Stekhanov T J Sumner C Thorne R J Walker

We present new experimental constraints on the WIMP-nucleon spin-dependent elastic cross sections using data from the first science run of ZEPLIN-III, a two-phase xenon experiment searching for galactic dark matter weakly interacting massive particles based at the Boulby mine. Analysis of approximately 450 kg x days fiducial exposure allow us to place a 90%-confidence upper limit on the pure WI...

Journal: :Physical review letters 2017
D S Akerib S Alsum H M Araújo X Bai A J Bailey J Balajthy P Beltrame E P Bernard A Bernstein T P Biesiadzinski E M Boulton R Bramante P Brás D Byram S B Cahn M C Carmona-Benitez C Chan A A Chiller C Chiller A Currie J E Cutter T J R Davison A Dobi J E Y Dobson E Druszkiewicz B N Edwards C H Faham S Fiorucci R J Gaitskell V M Gehman C Ghag K R Gibson M G D Gilchriese C R Hall M Hanhardt S J Haselschwardt S A Hertel D P Hogan M Horn D Q Huang C M Ignarra M Ihm R G Jacobsen W Ji K Kamdin K Kazkaz D Khaitan R Knoche N A Larsen C Lee B G Lenardo K T Lesko A Lindote M I Lopes A Manalaysay R L Mannino M F Marzioni D N McKinsey D-M Mei J Mock M Moongweluwan J A Morad A St J Murphy C Nehrkorn H N Nelson F Neves K O'Sullivan K C Oliver-Mallory K J Palladino E K Pease P Phelps L Reichhart C Rhyne S Shaw T A Shutt C Silva M Solmaz V N Solovov P Sorensen S Stephenson T J Sumner M Szydagis D J Taylor W C Taylor B P Tennyson P A Terman D R Tiedt W H To M Tripathi L Tvrznikova S Uvarov J R Verbus R C Webb J T White T J Whitis M S Witherell F L H Wolfs J Xu K Yazdani S K Young C Zhang

We report constraints on spin-independent weakly interacting massive particle (WIMP)-nucleon scattering using a 3.35×10^{4}  kg day exposure of the Large Underground Xenon (LUX) experiment. A dual-phase xenon time projection chamber with 250 kg of active mass is operated at the Sanford Underground Research Facility under Lead, South Dakota (USA). With roughly fourfold improvement in sensitivity...

Journal: :Physical review letters 2014
R Agnese A J Anderson M Asai D Balakishiyeva R Basu Thakur D A Bauer J Beaty J Billard A Borgland M A Bowles D Brandt P L Brink R Bunker B Cabrera D O Caldwell D G Cerdeno H Chagani Y Chen M Cherry J Cooley B Cornell C H Crewdson P Cushman M Daal D DeVaney P C F Di Stefano E Do Couto E Silva T Doughty L Esteban S Fallows E Figueroa-Feliciano G L Godfrey S R Golwala J Hall S Hansen H R Harris S A Hertel B A Hines T Hofer D Holmgren L Hsu M E Huber A Jastram O Kamaev B Kara M H Kelsey S Kenany A Kennedy M Kiveni K Koch A Leder B Loer E Lopez Asamar R Mahapatra V Mandic C Martinez K A McCarthy N Mirabolfathi R A Moffatt R H Nelson L Novak K Page R Partridge M Pepin A Phipps M Platt K Prasad M Pyle H Qiu W Rau P Redl A Reisetter R W Resch Y Ricci M Ruschman T Saab B Sadoulet J Sander R L Schmitt K Schneck R W Schnee S Scorza D N Seitz B Serfass B Shank D Speller A Tomada S Upadhyayula A N Villano B Welliver D H Wright S Yellin J J Yen B A Young J Zhang

We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass <30  GeV/c(2), with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2×10(-42)  cm(2) at 8  GeV/c(2). T...

2008
Annika H. G. Peter Scott Tremaine

Semi-analytic treatments of the evolution of orbits of weakly interacting massive particles (WIMPs) in the solar system suggest that the WIMPs bound to the solar system may enhance the direct detection rate relative to that of the unbound population by up to a factor of order unity, and boost the flux of neutrinos from WIMP annihilation in the Earth by up to two orders of magnitude. To test the...

1996
Robert J. K. Jacob

Unlike current GUI or WIMP style interfaces, non-WIMP user interfaces, such as virtual environments, involve parallel, continuous interactions with the user. However, most current visual (and non-visual) languages for describing human-computer interaction are based on serial, discrete, token-based models. This paper introduces a visual language for describing and programming the fine-grained as...

2013
Katharina Gerken Sven Frechenhäuser Ralf Dörner Johannes Luderschmidt

Employing post-WIMP interfaces, i.e. user interfaces going beyond the traditional WIMP (Windows, Icons, Menu, Pointer) paradigm, often implies a more complex authoring process for applications. We present a novel authoring method and an according tool that aims to enable developers to cope with the added level of complexity. Regarding the development as a process conducted on different layers, ...

2009
S. Rodrigues da Silva

In this work we show that 3-3-1 model with right-handed neutrinos has a natural WIMP dark matter candidate. It is a complex scalar with mass of order of some hundreds of GeV which carries two units of lepton number, a scalar bilepton. This makes it a very peculiar WIMP, very distinct from Supersymmetric or Extra-dimension candidates. Besides, although we have to make some reasonable assumptions...

2008
S. Rodrigues da Silva

In this work we show that 3-3-1 model with right-handed neutrinos has a natural weakly interacting massive particle (WIMP) dark mater candidate. It is a complex scalar with mass of order of some hundreds of GeV which carries two units of lepton number, a scalar bilepton. This makes it a very peculiar WIMP, very distinct from Supersymmetric or Extra-dimension candidates. Besides, although we hav...

2009
Yonatan Kahn

Two models of dark matter are examined in the context of the bright 511 keV gamma-ray signal observed from the center of the galaxy by the INTEGRAL satellite. A model of annihilating MeV-scale dark matter has been shown by Boehm et al. to be able to provide the required flux of positrons to explain the INTEGRAL signal, and the possible experimental consequences of this model are investigated in...

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