We present a six-dimensional Higgsless Standard Model with a realistic gauge sector. The model uses only the Standard Model gauge group SU(2)L × U(1)Y with the gauge bosons propagating in flat extra dimensions compactified on a rectangle. The electroweak symmetry is broken by boundary conditions, and the correct splitting between the W and Z gauge boson masses can be arranged by suitable choice...

The six independent formfactors describing the weak decay Λb → Λceνe are determined in terms of one universal function when both the b and c quarks are treated as heavy. The relations between these formfactors are modified by terms suppressed by inverse powers of the charm quark mass. We compute the formally leading long-distance corrections to these relations in chiral perturbation theory both...

The masses of the flavor octet and singlet baryons with negative parity and spin 1 2 are calculated using the QCD sum rule. We find that the chiral symmetry breaking vacuum condensates cause the mass splitting of the positive and negative baryons. The present sum rule reproduces the observed masses of these baryons within 10%, and predicts the mass of the excited Ξ baryon with J P = 1 2 − at 1....

Results of complete tree level calculations of the single top production reaction γe −→ νt̄b at the Next Linear Collider, including the contribution of anomalous operators to the Wtb coupling are presented. The sensitivity for probing the structure of the Wtb coupling in a model independent way is analyzed and found to be significantly higher than for comparable measurements at the Tevatron. The...

In the largeNc limit, the Λb and Λc can be treated as bound states of chiral solitons and mesons containing a heavy quark. We show that the soliton and heavy meson are bound in an attractive harmonic oscillator potential. The Isgur-Wise function for Λb → Λc e νe decay is computed in the large Nc limit. Corrections to the form factor which depend on mN/mQ can be summed exactly (mN and mQ are the...

Domain wall fermion (DWF)[1,2] is a promising tool to calculate hadronic quantities where chiral symmetry is important. Precise calculation of kaon mixing parameter BK is one success of this formulation[3]. More challenging calculations[4,5] of kaon weak matrix element for ′/ show a first reliable determination within lowest order chiral perturbation theory. Attempt to calculate nucleon matrix ...

Fluid mechanics plays a vital role in early vertebrate embryo development, an example being the establishment of left-right asymmetry. Following the dorsal-ventral and anterior-posterior axes, the left-right axis is the last to be established; in several species it has been shown that an important process involved with this is the production of a left-right asymmetric flow driven by ‘whirling’ ...

introduction: anthropology is the science of body sizes evaluation in living people which is applied in both medical and non-medical professions. the main purpose of the study is the evaluation of foot growth from birth to the age of 10 in folk fars girls of birjand and to make an archive of the data and to study symmetry based on anthropometry and dermatoglyphy. methods: in this study, the foo...

We have previously demonstrated that the mere organization of some elements in the visual field into an object attracts attention automatically. Here, we explored three different aspects of this automatic attentional capture: (a) Does the attentional capture by an object involve a spatial component? (b) Which Gestalt organization factors suffice for an object to capture attention? (c) Does the ...