- th / 9 71 10 28 v 2 3 1 D ec 1 99 7 A clue to the mechanism of Λ K + production in pp - reactions ∗

ar X iv : n uc l - th / 9 71 10 28 v 1 1 4 N ov 1 99 7 A clue to the mechanism of Λ K + production in pp - reactions ∗

- th / 9 71 20 58 v 1 1 6 D ec 1 99 7 Charged current weak electroproduction of ∆ resonance

We study the weak production of ∆ (i.e. e − + p → ∆ 0 + ν e and e + + p → ∆ ++ + ¯ ν e) in the intermediate energy range corresponding to the Mainz and TJNAF electron accelerators. The differential cross sections σ(θ) are found to be of the order of 10 −39 cm 2 /sr, over a range of angles which increases with energy. The possibility of observing these reactions with the high luminosities availa...

ar X iv : n uc l - th / 9 71 20 75 v 1 2 3 D ec 1 99 7 1 Kaon Electromagnetic Production on Nuclei

The formation and excitation of hypernuclei through kaon photoproduction is reviewed. Basic features of the production process are emphasized. The possibility of extracting new information on hypernuclear structure and on the wave function of the bound Λ is discussed. New results are presented for the quasifree production process A(γ, KΛ)B. Observables of this reaction are shown to be sensitive...

ar X iv : 0 71 2 . 13 28 v 1 [ m at h . R A ] 9 D ec 2 00 7 When Are Torsionless Modules Projective ?

In this paper, we study the problem when a finitely generated torsionless module is projective. Let Λ be an Artinian local algebra with radical square zero. Then a finitely generated torsionless Λ-module M is projective if Ext Λ (M,M) = 0. For a commutative Artinian ring Λ, a finitely generated torsionless Λ-module M is projective if the following conditions are satisfied: (1) Ext Λ (M,Λ) = 0 f...

ar X iv : n uc l - th / 9 71 10 31 v 1 1 8 N ov 1 99 7 HUPD - 9722 Effect of ρN channel in the γN → ππN reactions