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197 papers · 1 filter
Level rearrangement in exotic atoms and quantum dots
Monique Combescure, Avinash Khare, Ashok Raina +2
A presentation and a generalisation are given of the phenomenon of level rearrangement, which occurs when an attractive long-range potential is supplemented by a short-range attrac…
Black Hole Microstates and Attractor Without Supersymmetry
Atish Dabholkar, Ashoke Sen, Sandip Trivedi
Due to the attractor mechanism, the entropy of an extremal black hole does not vary continuously as we vary the asymptotic values of various moduli fields. Using this fact we argue…
Measurement of the ppbar to ttbar production cross section at sqrt(s)=1.96 TeV in the fully hadronic decay channel
D0 Collaboration, V. Abazov
A measurement of the top quark pair production cross section in proton anti-proton collisions at an interaction energy of sqrt(s)=1.96 TeV is presented. This analysis uses 405 pb-1…
Search for techniparticles in e +jets events at D0
D0 Collaboration, V. Abazov
We search for the technicolor process ppbar -> rho_T/omega_T ->W+pi_T in events containing one electron and two jets, in data corresponding to an integrated luminosity of 390 pb-1,…
Noncritical-Topological Correspondence: Disc Amplitudes and Noncompact Branes
Anindya Mukherjee, Sunil Mukhi, Rahul Nigam
We examine the duality between type 0 noncritical strings and topological B-model strings, with special emphasis on the flux dependence. The former theory is known to exhibit holom…
Spectrum of CHL Dyons from Genus-Two Partition Function
Atish Dabholkar, Davide Gaiotto
We compute the genus-two chiral partition function of the left-moving heterotic string for a CHL orbifold. The required twisted determinants can be evaluated explici…
Corrections to Tri-bimaximal Neutrino Mixing: Renormalization and Planck Scale Effects
Amol Dighe, Srubabati Goswami, Werner Rodejohann
We study corrections to tri-bimaximal (TBM) neutrino mixing from renormalization group (RG) running and from Planck scale effects. We show that while the RG effects are negligible…
Search for single production of scalar leptoquarks in p\bar{p} collisions decaying into muons and quarks with the D0 detector
D0 Collaboration, V. Abazov
We report on a search for second generation leptoquarks LQ_2 which decay into a muon plus quark in p\bar{p} collisions at a center-of-mass energy of sqrt{s} = 1.96 TeV in the D0 de…
Study of decays
The Belle Collaboration, A. Kuzmin
We report the results of a study of neutral B meson decays to the D^0 pi+ pi- final state, where the D^0 is fully reconstructed. The results are obtained from an event sample conta…
Age Sequence in Small Clusters Associated with Bright-Rimmed Clouds
Katsuo Ogura, Neelam Chauhan, Anil K. Pandey +3
Bright-rimmed clouds (BRCs) found in H II regions are probable sites of triggered star formation due to compression by ionization/shock fronts, and it is hypothesized that star for…
Virtual Betti Numbers of Compact Locally Symmetric Spaces
T. N. Venkataramana
We show that the virtual i-th Betti number of acompact locally symmetric space is either the i-th Betti number of the compact dual or else is infinite.
Spinning Strings as Small Black Rings
Atish Dabholkar, Norihiro Iizuka, Ashik Iqubal +2
Certain supersymmetric elementary string states with spin can be viewed as small black rings whose horizon has the topology of S^1 \times S^{d-3} in a d-dimensional string theory.…
The VVDS-VLA Deep Field: III. GMRT observations at 610 MHz and the radio spectral index properties of the sub-mJy population
M. Bondi, P. Ciliegi, T. Venturi +12
We present the low frequency (610 MHz) radio source counts of the VVDS-VLA field and investigate the radio spectral index properties of the sub-mJy population. We use new deep (r.m…
Observations of AGNs using PACT
D. Bose, V. R. Chitnis, P. R. Vishwanath +5
We report our observations on 4 AGNs viz, Mkn421, Mkn501, 1ES1426+428 and ON231 belonging to a sub-class called blazars. The observations were carried out using the Pachmarhi Array…
Cosmologies with Null Singularities and their Gauge Theory Duals
Sumit R. Das, Jeremy Michelson, K. Narayan +1
We investigate backgrounds of Type IIB string theory with null singularities and their duals proposed in hep-th/0602107. The dual theory is a deformed N=4 Yang-Mills theory in 3+1…
Observation of the decay Upsilon(4S) -> Upsilon(1S) pi+ pi-
The Belle Collaboration
We study transitions between Upsilon states with the emission of charged pions using 477 fb^{-1} of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- colli…
On the orientational ordering of long rods on a lattice
Anandamohan Ghosh, Deepak Dhar
We argue that a system of straight rigid rods of length k on square lattice with only hard-core interactions shows two phase transitions as a function of density, rho, for k >= 7.…
Strongly Semistable Bundles on a Curve over a finite field
S. Subramanian
We show that a principal G bundle on a smooth projective curve over a finite field is strongly semistable if and only if it is defined by a representation of the fundamental group…
Scanning probe imaging of coexistent ferromagnetism and ferroelectricity at room temperature
V. R. Palkar, S. C. Purandare, S. Gohil +2
Room temperature coexistence of ferromagnetism and ferroelectricity in a thin film of a novel material of nominal composition PbTi0.5Fe0.5O3-d is probed by standard ferroelectric a…
Annihilators of Local Cohomology in Characteristic Zero
Paul Roberts, Anurag K. Singh, V. Srinivas
This paper discusses the problem of whether it is possible to annihilate elements of local cohomology modules by elements of arbitrarily small order under a fixed valuation. We fir…
Moduli and (un)attractor black hole thermodynamics
Dumitru Astefanesei, Kevin Goldstein, Swapna Mahapatra
We investigate four-dimensional spherically symmetric black hole solutions in gravity theories with massless, neutral scalars non-minimally coupled to gauge fields. In the non-extr…
A Search for the Rare Leptonic Decays B+ -> mu+ nu and B+ -> e+ nu
N. Satoyama
We present a search for the decays B+ -> mu+ nu_mu and B+ -> e+ nu_e in a 253 fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energ…
Moments of the Hadronic Invariant Mass Spectrum in B --> X_c l nu Decays at Belle
C. Schwanda
We present a measurement of the hadronic invariant mass squared (M^2_X) spectrum in charmed semileptonic B meson decays B --> X_c l nu based on 140 fb^-1 of Belle data collected ne…
Search for the pair production of scalar top quarks in the acoplanar charm jet topology in p pbar collisions at sqrt(s)=1.96 TeV
D0 Collaboration, V. M. Abazov
A search for the pair production of scalar top quarks, or stops, has been performed in 360 pb-1 of data from p pbar collisions at a center-of-mass energy of 1.96 TeV, collected by…