فضاهای θ - همبند و θ- بستار

Θ ∗ partner to the Θ ( 1540 ) baryon

If the exotic baryon Θ(1540) is udud¯ s with J P = 1 2 + , we predict that there is a Θ * (1540− 1680) with J P = 3 2 +. The width Γ(Θ * → KN) is at least a factor of three larger than Γ(Θ). The possibilities of Θ * → KN π or Θγ via M 1 and E2 multipoles are discussed. A major plank in establishing the constituent quark model was the absence of baryons with strangeness +1. The announcement of s...

On (θ, θ)-Derivations in Semiprime Rings

Isospin Analysis of Θ + production forbids γp → Θ + K s and allows γn → Θ + K −

The discrepancy between Θ photoproduction on proton vs. deuteron can be resolved if the photon couples much more strongly to KK than to KK̄ as indicated by the experimentally observed asymmetry between γp → Λ(1520)K and γn → Λ(1520)Ks. Significant signal-background interference effects can occur in experiments like γN → K̄Θ which search for the Θ as a narrow I = 0 resonance in a definite final st...

θ-Polycyclic Codes and θ-Sequential Codes over Finite Fields

In this paper we generalize the notion of cyclicity of codes, that is, θ-polycyclic codes and θ-sequential codes. It is shown that for a code C, C is θ-polycyclic (θ-sequential) if and only if its dual C⊥ is θ−1-sequential (θ−1-polycyclic). Furthermore, we study central θ-constacyclic codes. Mathematics Subject Classification: Primary 94B60; Secondary 94B15, 16W20

Complexity Classes between Θ

We give different characterizations of the classes Plogi(NP), which are located between Θ2 and ∆2 . First we show that these classes are equal to the classes AC i−1(NP). Second we prove that they are also equivalent to certain binary search classes over NP. Third we show that they can be characterized as the classes defined by circuits of size O(log n) with NP oracle gates. All the proofs given...

Noncommutativity and θ-locality

In this paper, we introduce the condition of θ-locality which can be used as a substitute for microcausality in quantum field theory on noncommutative spacetime. This condition is closely related to the asymptotic commutativity which was previously used in nonlocal QFT. Heuristically, it means that the commutators of observables behave at large spacelike separation like exp(−|x − y|2/θ), where ...