Physical sciences topic list of research papers
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The matrix of unitarity triangle angles for quarks
Abstract In the context of quark (as for lepton) mixing, we introduce the concept of the matrix of unitarity triangle angles Φ, emphasising that it carries equivalent information to the complex mixing matrix V itself. The angle matrix Φ has the...
2009 / P.F. Harrison, S. Dallison, W.G. Scott -
A matrix model for 2D quantum gravity defined by Causal dynamical triangulations
Abstract A novel continuum theory of two-dimensional quantum gravity, based on a version of Causal Dynamical Triangulations which incorporates topology change, has recently been formulated as a genuine string field theory in zero-dimensional target...
2008 / J. Ambjørn, R. Loll, Y. Watabiki, W. Westra, S. Zohren -
Integrality of instanton numbers and p-adic B-model
Abstract We study integrality of instanton numbers (genus zero Gopakumar–Vafa invariants) for quintic and other Calabi–Yau manifolds. We start with the analysis of the case when the moduli space of complex structures is one-dimensional; later we...
2006 / Maxim Kontsevich, Albert Schwarz, Vadim Vologodsky -
Tachyonic open inflationary universes
Abstract We study one-field open inflationary models in a universe dominated by tachyon matter. In these scenarios, we determine and characterize the existence of the Coleman–De Lucia (CDL) instanton. Also, we study the Lorentzian regime, that is,...
2007 / Leonardo Balart, Sergio del Campo, Ramón Herrera, Pedro Labraña, Joel Saavedra -
Properties of the 7He ground state from 8He neutron knockout
Abstract The unbound nucleus 7He, produced in neutron-knockout reactions with a 240 MeV/u 8He beam in a liquid-hydrogen target, has been studied in an experiment at the ALADIN-LAND setup at GSI. From an R-matrix analysis the resonance parameters for ...
2009 / Yu. Aksyutina, H.T. Johansson, T. Aumann, K. Boretzky, M.J.G. Borge, et al. -
Stability analysis of the Randall–Sundrum braneworld in presence of bulk scalar
Abstract The stability problem of Randall–Sundrum braneworld is readdressed in the light of stabilizing bulk scalar fields. It is shown that in such scenario the instability in general persists because of back-reaction even when an arbitrary...
2006 / Debaprasad Maity, Soumitra SenGupta, Sourav Sur -
Running minimal flavor violation
Abstract We consider the flavor structure of the minimal supersymmetric standard model (MSSM) in the framework of ‘minimal flavor violation’ (MFV). We show that, if one imposes the MFV structure at some scale, to a good accuracy the MFV...
2008 / Paride Paradisi, Michael Ratz, Roland Schieren, Cristoforo Simonetto -
String percolation and the Glasma
Abstract We compare string percolation phenomenology to Glasma results on particle rapidity densities, effective string or flux tube intrinsic correlations, the ridge phenomena and long range forward–backward correlations. Effective strings may be a ...
2010 / J. Dias de Deus, C. Pajares -
Non-unitarity of the leptonic mixing matrix in the TeV-scale type-I seesaw model
Abstract The non-unitarity effects in leptonic flavor mixing are regarded as one of the generic features of the type-I seesaw model. Therefore, we explore these effects in the TeV-scale type-I seesaw model, and show that there exist non-trivial...
2010 / Tommy Ohlsson, Christoph Popa, He Zhang -
Discrete symmetry and CP phase of the quark mixing matrix
Abstract A simple specific pattern of the two 3 × 3 quark mass matrices is proposed, resulting in a prediction of the CP phase of the charged-current...
2005 / Shao-Long Chen, Ernest Ma -
Upper limits on the Peccei–Quinn scale and on the reheating temperature in axino dark matter scenarios
Abstract Considering axino cold dark matter scenarios with a long-lived charged slepton, we study constraints on the Peccei–Quinn scale f a ...
2009 / Ayres Freitas, Frank Daniel Steffen, Nurhana Tajuddin, Daniel Wyler -
Non-standard neutrino interactions in the Zee–Babu model
Abstract We investigate non-standard neutrino interactions (NSIs) in the Zee–Babu model. The size of NSIs predicted by this model is obtained from a full scan over the parameter space, taking into account constraints from low-energy experiments such ...
2009 / Tommy Ohlsson, Thomas Schwetz, He Zhang -
Brane gravitational interactions from 6D supergravity
Abstract We investigate the massive graviton contributions to 4D gravity in a 6D brane world scenario, whose bulk field content can include that of 6D chiral gauged supergravity. We consider a general class of solutions having 3-branes, 4D Poincaré...
2009 / A. Salvio -
A note on Hamilton–Jacobi formalism and D-brane effective actions
Abstract We first review the canonical formalism with general space-like hypersurfaces developed by Dirac by rederiving the Hamilton–Jacobi equations which are satisfied by on-shell actions defined on such hypersurfaces. We compare the case of...
2003 / Matsuo Sato, Asato Tsuchiya -
Pygmy Quadrupole Resonance in skin nuclei
Abstract The electric quadrupole response is investigated theoretically by HFB and QPM calculations along the Sn isotopic chain with special emphasis on excitations above the first collective state and below the particle threshold. Depending on the...
2010 / N. Tsoneva, H. Lenske -
CDT meets Hořava–Lifshitz gravity
Abstract The theory of causal dynamical triangulations (CDT) attempts to define a nonperturbative theory of quantum gravity as a sum over spacetime geometries. One of the ingredients of the CDT framework is a global time foliation, which also plays...
2010 / J. Ambjørn, A. Görlich, S. Jordan, J. Jurkiewicz, R. Loll -
Black holes and the classical model of a particle in Einstein non-linear electrodynamics theory
Abstract Modified by a logarithmic term, the non-linear electrodynamics (NED) model of the Born–Infeld (BI) action is reconsidered. Unlike the standard BI action, this choice provides interesting integrals of the Einstein-NED equations. It is found...
2009 / S. Habib Mazharimousavi, M. Halilsoy -
Transverse spin asymmetries for W-production in proton–proton collisions
Abstract We study parity-even and parity-odd polarization observables for the process p p → l ± ...
2011 / Andreas Metz, Jian Zhou -
The 8He and 10He spectra studied in the reaction
Abstract The low-lying spectra of 8He and 10He nuclei were studied in the 3H(6He, p)8He and 3H(8He, p)10He transfer reactions. The 0 + ...
2009 / M.S. Golovkov, L.V. Grigorenko, G.M. Ter-Akopian, A.S. Fomichev, Yu.Ts. Oganessian, et al. -
Topological density fluctuations and gluon condensate around confining string in Yang–Mills theory
Abstract We study the structure of the confining string in Yang–Mills theory using the method of the field strength correlators. The method allows us to demonstrate that both the local fluctuations of the topological charge and the gluon condensate...
2008 / M.N. Chernodub, I.E. Kozlov