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196 papers · 1 filter
Neutrinos from a core collapse supernova
Amol Dighe
The neutrino burst from a galactic supernova can help determine the neutrino mass hierarchy and , and provide crucial information about supernova astrophysics. Here we revi…
Detectors and flux instrumentation for future neutrino facilities
T. Abe, H. Aihara, C. Andreopoulos +66
This report summarises the conclusions from the detector group of the International Scoping Study of a future Neutrino Factory and Super-Beam neutrino facility. The baseline detect…
Manifestation of geometric frustration on magnetic and thermodynamic properties of pyrochlores (X=Ti, Zr)
Surjeet Singh, Surajit Saha, S. K. Dhar +3
We present here magnetization, specific heat and Raman studies on single-crystalline specimens of the first pyrochlore member of the rare-earth titanate series. Its a…
Electronic and structural transition in
R. Bindu, Kalobaran Maiti, R. Rawat +1
We investigate the interplay of the electronic and structural transition in LaSrMnO. The transport and specific heat measurements exhibit unusual evolutions a…
Exact entropy of dimer coverings for a class of lattices in three or more dimensions
Deepak Dhar, Samarth Chandra
We construct a class of lattices in three and higher dimensions for which the number of dimer coverings can be determined exactly using elementary arguments. These lattices are a g…
Stellar contents and star formation in the young open cluster Stock 8
Jessy Jose, A. K. Pandey, D. K. Ojha +7
We present CCD photometry of the young open cluster Stock 8 with the aim to study the basic properties and star formation scenario in this region. The radius of the cluste…
Magnetic anomalies in single crystalline ErPd2Si2
E. V. Sampathkumaran, Niharika Mohapatra, Kartik K Iyer +3
Considering certain interesting features in the previously reported 166Er Moessbauer effect and neutron diffraction data on the polycrystalline form of ErPd2Si2 crystallizing in Th…
Magnetic phase transition and magnetocaloric effect in PrCo9Si4 and NdCo9Si4
Niharika Mohapatra, E. V. Sampathkumaran
The compounds, PrCo9Si4 and NdCo9Si4, have been recently reported to exhibit first-order ferromagnetic transitions near 24 K. We have subjected this compound for further characteri…
Model-independent measurement of the W boson helicity in top quark decays
D0 Collaboration, V. M. Abazov
We present the first model-independent measurement of the helicity of bosons produced in top quark decays, based on a 1 fb sample of candidate events in the d…
Magnetocaloric effect in R2Ti3Ge4 (R = Gd, Tb and Er) Compounds
R. Nirmala, Darshan C. Kundaliya, A. V. Morozkin +1
Heat capacity of polycrystalline R2Ti3Ge4 (R = Gd, Tb and Er) compounds (Orthorhombic, Sm5Ge4-type, Space group Pnma) has been studied in the temperature range of 1.8 K to 300 K in…
First measurement of the forward-backward charge asymmetry in top quark pair production
D0 Collaboration, V. M. Abazov
We present the first measurement of the integrated forward-backward charge asymmetry in top-antitop quark pair (ttbar) production in proton-antiproton collisions in the lepton plus…
Search for ZZ and Zγ^* production in p-barp collisions at sqrt(s) = 1.96 TeV and limits on anomalous ZZZ and ZZγ^* couplings
D0 Collaboration, V. Abazov
We present a study of four muon, four electron, and two muon two electron events using 1 fb^(-1) of data collected with the D0 detector at the Fermilab Tevatron p-barp Collider at…
A combined search for the standard model Higgs boson at sqrt{s}=1.96 TeV
D0 Collaboration, V. M. Abazov
We present new results of the search for WH to lepton neutrino b b production in ppbar collisions at a center of mass energy of sqrt{s}=1.96 TeV, based on a dataset with integrated…
The Local Group dwarf Leo T: HI on the brink of star formation
Emma V. Ryan-Weber, Ayesha Begum, Tom Oosterloo +5
We present Giant Meterwave Radio Telescope (GMRT) and Westerbork ynthesis Radio Telescope (WSRT) observations of the recently discovered Local Group dwarf galaxy, Leo T. The peak H…
Search for squarks and gluinos in events with jets and missing transverse energy using 2.1 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV
D0 Collaboration, V. Abazov
A data sample corresponding to an integrated luminosity of 2.1 fb-1 collected by the D0 detector at the Fermilab Tevatron Collider was analyzed to search for squarks and gluinos pr…
Collective three-flavor oscillations of supernova neutrinos
Basudeb Dasgupta, Amol Dighe
Neutrinos and antineutrinos emitted from a core collapse supernova interact among themselves, giving rise to collective flavor conversion effects that are significant near the neut…
Measurement of the B0_s semileptonic branching ratio to an orbitally excited D_s** state, Br(B0_s -> Ds1(2536) mu nu)
D0 Collaboration, V. Abazov
In a data sample of approximately 1.3 fb-1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state D_s1(2536) has been observed with a measured mass…
Nonlinear Fluid Dynamics from Gravity
Sayantani Bhattacharyya, Veronika E Hubeny, Shiraz Minwalla +1
Black branes in AdS5 appear in a four parameter family labeled by their velocity and temperature. Promoting these parameters to Goldstone modes or collective coordinate fields -- a…
Proposal for an experiment to search for Randall-Sundrum type corrections to Newton's law of gravitation
Mofazzal Azam, M. Sami, C. S. Unnikrishnan +1
String theory, as well as the string inspired brane-world models such as the Randall-Sundrum (RS) one, suggest a modification of Newton's law of gravitation at small distance scale…
Mass Spectrum and Statistical Entropy of the BTZ black hole from Canonical Quantum Gravity
Cenalo Vaz, Sashideep Gutti, Claus Kiefer +2
In a recent publication we developed a canonical quantization program describing the gravitational collapse of a spherical dust cloud in 2+1 dimensions with a negative cosmological…
Probing a Supersymmetric Model for Neutrino Masses at Ultrahigh Energy Neutrino Telescopes
M. Hirsch, D. P. Roy, J. W. F. Valle
A bilinear R-Parity breaking SUSY model for neutrino mass and mixing predicts the lightest superparticle to decay mainly into a pair of tau leptons or b quarks along with a neutrin…
Classical and Quantum Gravitational Collapse in d-dim AdS Spacetime I. Classical Solutions
Rakesh Tibrewala, Sashideep Gutti, T. P. Singh +1
We study the collapse of a spherically symmetric dust distribution in -dimensional AdS spacetime. We investigate the role of dimensionality, and the presence of a negative cosmo…
Measurement of the shape of the boson transverse momentum distribution in ppbar -> Z/gamma* -> ee+X events produced at sqrt{s}=1.96 TeV
D0 Collaboration, V. Abazov
We present a measurement of the shape of the Z/gamma* boson transverse momentum (qT) distribution in ppbar -> Z/gamma* -> ee+X events at a center-of-mass energy of 1.96 TeV using 0…
Four Zero Neutrino Yukawa Textures in the Minimal Seesaw Framework
Gustavo C. Branco, David Emmanuel-Costa, M. N. Rebelo +1
We investigate, within the Type I seesaw framework, the physical implications of zero textures in the Yukawa couplings which generate the neutrino Dirac mass matrix . It is sh…