Showing papers in "Nuclear Physics in 2007"

TL;DR: In this paper, the authors make a number of conjectures about the geometry of continuous moduli parameterizing the string landscape, including that such moduli are always given by expectation value of scalar fields and that moduli spaces with finite non-zero diameter belong to the swampland.

TL;DR: In this article, the coefficients of the 4-, 3-, 2-and 1-point one-loop integrals of arbitrary scattering processes are derived from the amplitude of the wavelet.

TL;DR: In this article, the cosmological relic abundance of DM was revisited and non-perturbative corrections were made to obtain the predicted mass of DM with energy E ≳ 10 17 eV (possibly present among ultra-high energy cosmic rays).

TL;DR: In the limit of a large number of colors, N c, it was shown in this article that gauge theories can exhibit several distinct phases at nonzero temperature and quark density, including a cold, dilute phase of confined hadrons and a hot phase of deconfined quarks and gluons, with pressure ∼ N c 2.

TL;DR: In this paper, the authors systematically investigate instanton corrections from Euclidean D-branes to the matter field superpotential of various classes of N = 1 supersymmetric Dbrane models in four dimensions.

TL;DR: In this article, the authors examined the recent suggestion that P -and CP -odd effects in QCD matter can induce electric charge asymmetry with respect to reaction plane in relativistic heavy ion collisions.

TL;DR: In this article, the perturbative QCD was extended to include elastic as well as inelastic parton energy losses and jet path length fluctuations, which significantly reduced the discrepancy between theory and current data without violating the global entropy bounds.

TL;DR: In this paper, a one-soliton solution for the gauge-fixed string sigma model on AdS 5 × S 5 was constructed, which is a generalisation of the one-magnon configuration of Hofman and Maldacena.

TL;DR: In this paper, the authors study topological defect lines in two-dimensional rational conformal field theory and show how the resulting onedimensional phase boundaries can be used to extract symmetries and order-disorder dualities of the CFT.

TL;DR: In this paper, the running coupling corrections are included in the JIMWLK/BK evolution kernel by replacing the fixed coupling constant α s in it with α s ( 1 / r 1 2 ) α s( 1/ r 2 2 )α s (1 / r 2 ) ε n f α s n f 1 / R 2 ), where r 1 and r 2 are transverse distances between the emitted gluon and the harder quark off of which it was emitted.

TL;DR: In this article, the authors evaluate the asymptotic behavior of the complete contribution for m c ≫ m b / 2, assuming that the β 0 -part is a good approximation at m c = 0.

TL;DR: In this article, the origin of non-Abelian discrete flavor symmetries in superstring theory was studied and a simple geometric understanding of the realization of the non-abelian flavor symmetsries was given.

TL;DR: In this article, a general framework was proposed to study the dynamics of fundamental quarks in a confining gauge theory, where flavors are introduced by placing a set of (coincident) branes and antibranes on a background dual to confining color theory.

TL;DR: In this article, it was shown that a specific defined global lepton-number symmetry, broken on the level of O(10 4 ) leads to the required pattern of sterile neutrino masses being consistent with the data on neutrinos oscillations, allowing to fix the flavour structure of couplings of singlet fermions to the particles of the Standard Model and indicates that their masses are likely to be smaller than O(1) GeV.

TL;DR: In this article, a supersymmetric model of quark and lepton masses based on the discrete flavour symmetry group T ′, the double covering of A 4, is presented.

TL;DR: In this article, the Friedmann equations for the (n - I)-dimensional brane embedded in (n + 1)-dimensional bulk, with intrinsic curvature term of the brane included in the action (DGP) model were obtained.

TL;DR: In this article, the hard-scattering kernels relevant to the negative-helicity decay amplitude in B decays to two vector mesons in the framework of QCD factorisation were calculated.

TL;DR: In this paper, several observational constraints are imposed on the interacting holographic model of dark energy and dark matter, and the model has been proved to be robust and with reasonable bounds predicts a non-vanishing interaction of light and dark energy.

TL;DR: In this paper, it was shown that the A4 discrete symmetry that naturally leads to tri-bimaximal neutrino mixing can be obtained as a result of an orbifolding starting from a model in 6 dimensions.

TL;DR: In this paper, a formalism based on coupling the Dirac equation that models the low energy electronic excitations of clean flat graphene samples to a curved space is proposed to study the electronic and transport properties of graphene sheets with corrugations.

TL;DR: In this paper, the authors investigated the possibility that the CP-violation necessary for the generation of the baryon asymmetry of the Universe is due exclusively to the Dirac and/or Majorana CPviolating phases in the PMNS neutrino mixing matrix U, and thus is directly related to the low energy CPviolation in the lepton sector.

TL;DR: In this paper, the authors introduced the impact parameter representation for conformal field theory correlators of the form A similar to (O 1O2O1O2), which approximates the conformal partial wave decomposition in the limit of large spin and dimension of the exchanged primary.

TL;DR: In this article, high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6 LiD target are presented.

TL;DR: In this paper, it was shown that the entanglement entropy and alpha entropies corresponding to spatial polygonal sets in 2 + 1 dimensions contain a term which scales logarithmically with the cutoff.

TL;DR: In this article, the authors derived forward inclusive dijet production in the scattering of a dilute hadron off an arbitrary dense target, whose partons with small fraction of momentum x are described by a color glass condensate.

TL;DR: In this paper, it was shown that the self-tuning property of the twist-two anomalous dimensions of higher-twist scalar operators is a function of the conformal spin which is modified in higher loops by an amount proportional to the anomalous dimension.

TL;DR: In this paper, the authors present new results on the statistical hadronization of heavy quarks at SPS, RHIC and LHC energies, including a separation of the collision geometry into a core and a corona part and an estimate of the annihilation rate of charm quark in a hot plasma.

TL;DR: In this article, the anomalous dimension of the twist-2 operators at the large spin s in the N = 4 super-symmetric gauge theory is investigated, and the solution has an essential singularity on the second sheet of the variable j appearing in its Laplace transformation.

TL;DR: Read and Saleur as mentioned in this paper derived the boundary CFT of spin-1/2 chains with supersymmetry algebras with open (or free) boundary conditions in all cases.

TL;DR: Using the large acceptance apparatus FOPI, the authors studied pion emission in the reactions (energies in A GeV are given in parentheses): 40Ca+40Ca (0.6, 0.8, 1.5), 96Zr+96Zr ( 0.4, 1 0, 1 5), 197Au+ 198Au(0.2, 1 2, 1 3),