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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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- National Institute for Subatomic PhysicsNL1.3k papers
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75 papers · 1 filter
T-duality for principal torus bundles and dimensionally reduced Gysin sequences
Peter Bouwknegt, Keith Hannabuss, Varghese Mathai
We reexamine the results on the global properties of T-duality for principal circle bundles in the context of a dimensionally reduced Gysin sequence. We will then construct a Gysin…
Search for Point Sources of Ultra-High Energy Cosmic Rays Above 40 EeV Using a Maximum Likelihood Ratio Test
s Eye Collaboration, G. R. Farrar
We present the results of a search for cosmic ray point sources at energies above 40 EeV in the combined data sets recorded by the AGASA and HiRes stereo experiments. The analysis…
Constituent quark models and pentaquark baryons
K. Maltman
We discuss certain general features of the pentaquark picture for the theta, its 10bar_F partner, Xi_{3/2}, and possible heavy quark analogues. Models employing spin-dependent inte…
Heavy Antiquark Pentaquarks in the CM and GB Models
K. Maltman
The splittings between positive parity pentaquarks containing a single heavy (c,b) antiquark and four light (u,d) quarks are investigated in models having spin-dependent interactio…
The FLIC Overlap Quark Propagator
Waseem Kamleh, Patrick O. Bowman, Derek B. Leinweber +2
FLIC overlap fermions are a variant of the standard (Wilson) overlap action, with the FLIC (Fat Link Irrelevant Clover) action as the overlap kernel rather than the Wilson action.…
Entire cyclic homology of continuous trace algebras
Varghese Mathai, Danny Stevenson
A central result here is the computation of the entire cyclic homology of canonical smooth subalgebras of stable continuous trace C*-algebras having smooth manifolds M as their spe…
Nonassociative tori and applications to T-duality
Peter Bouwknegt, Keith Hannabuss, Varghese Mathai
In this paper, we initiate the study of C*-algebras endowed with a twisted action of a locally compact Abelian Lie group, and we construct a twisted crossed product, which is in ge…
Chiral radiative corrections and D_s(2317)/D(2308) mass puzzle
Taekoon Lee, Ian Woo Lee, D. P. Min +1
We show that one loop chiral corrections for heavy-light mesons in potential model can explain the small mass of D_s(2317) as well as the small mass gap between D_s(2317) and D(230…
CP-violating theta parameter in the domain model of the QCD vacuum
Alex C. Kalloniatis, Sergei N. Nedelko
A non-zero CP-violating parameter is treated in the domain model which assumes a cluster-like vacuum structure whose units are characterised in particular by a topological char…
Towards a Connection Between Nuclear Structure and QCD
A. W. Thomas, P. A. M. Guichon, D. B. Leinweber +1
As we search for an ever deeper understanding of the structure of hadronic matter one of the most fundamental questions is whether or not one can make a connection to the underlyin…
Bundle gerbes for Chern-Simons and Wess-Zumino-Witten theories
Alan L. Carey, Stuart Johnson, Michael K. Murray +2
We develop the theory of Chern-Simons bundle 2-gerbes and multiplicative bundle gerbes associated to any principal -bundle with connection and a class in $H^4(BG, \ZZ)$ for a co…
Type IIB String Theory, S-Duality, and Generalized Cohomology
Igor Kriz, Hisham Sati
In the presence of background Neveu-Schwarz flux, the description of the Ramond-Ramond fields of type IIB string theory using twisted K-theory is not compatible with S-duality. We…
Neutral pion decay in dense skyrmion matter
Alexander C. Kalloniatis, Byung-Yoon Park
We study the density dependence of the decay using the Skyrme Lagrangian to describe simultaneously both the matter background and mesonic fluctuations. Pion properties…
Quark propagator in Landau and Laplacian gauges with overlap fermions
J. B. Zhang, Patrick O. Bowman, Ryan J. Coad +3
The properties of the momentum space quark propagator in Landau gauge and Gribov copy free Laplacian gauge are studied for the overlap quark action in quenched lattice QCD. Numeric…
Neutron Star Properties from an NJL Model Modified to Simulate Confinement
S. Lawley, W. Bentz, A. W. Thomas
The NJL model has recently been extended with a method to simulate confinement. This leads in mean field approximation to a natural mechanism for the saturation of nuclear matter.…
Point singularities and suprathreshold stochastic resonance in optimal coding
Mark D. McDonnell, Nigel G. Stocks, Charles E. M. Pearce +1
Motivated by recent studies of population coding in theoretical neuroscience, we examine the optimality of a recently described form of stochastic resonance known as suprathreshold…
Charmonium Spectrum from Quenched QCD with Overlap Fermions
S. Tamhankar, A. Alexandru, Y. Chen +7
We present preliminary results using overlap fermions for the charmonium spectrum, in particular for hyperfine splitting. Simulations are performed on lattices, wi…
Strings, Junctions and Stability
Avijit Mukherjee, Subir Mukhopadhyay, Koushik Ray
Identification of string junction states of pure SU(2) Seiberg-Witten theory as B-branes wrapped on a Calabi-Yau manifold in the geometric engineering limit is discussed. The wrapp…
Prospects for radio detection of ultra-high energy cosmic rays and neutrinos
H. Falcke, P. Gorham, R. J. Protheroe
The origin and nature of the highest energy cosmic ray events is currently the subject of intense investigation by giant air shower arrays and fluorescent detectors. These particle…
On mysteriously missing T-duals, H-flux and the T-duality group
Varghese Mathai, Jonathan Rosenberg
A general formula for the topology and H-flux of the T-duals of type II string theories with H-flux on toroidal compactifications is presented here. It is known that toroidal compa…
Quark-gluon vertex in arbitrary kinematics
Jon-Ivar Skullerud, Patrick O. Bowman, Ayse Kizilersu +2
We compute the quark-gluon vertex in quenched lattice QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The complete vertex is computed in two sp…
Heavy Quark Analogues of the Theta and Their Excitations
Kim Maltman
Predictions for the low-lying excitation spectrum of positive parity pentaquark systems containing one c or b antiquark and four light u,d quarks are obtained in the quark model pi…
Quark Model Perspectives on Pentaquark Exotics
Kim Maltman
Expectations and predictions for pentaquark exotics based on the quark model perspective are presented. Recent quark model scenarios, and calculations performed in different realiz…
Improved Measure of Local Chirality
Terrence Draper, Andrei Alexandru, Ying Chen +7
It is popular to probe the structure of the QCD vacuum indirectly by studying individual fermion eigenmodes, because this provides a natural way to filter out UV fluctuations. The…