Unified description of hadronic and leptonic degrees of freedom in a superstring model involving supercurrent conditions

title: Fermion dominated composite superstring model and unified description of hadron and lepton degrees of freedom in it
abstract: New string dynamics is formulated on the basis of the extended set of supergauge constraints including not only supergauge Virasoro conditions but also nilpotent supercurrent constraints . This approach arises from a natural generalization of the classical operator many-string vertices. The formulation of this model leads to three two-dimensional surfaces for description of hadron strings. It gives some dynamical generalization of Chan-Paton factor for string amplitudes in terms of operator vertices. Supersymmetry on the 2-d world surface is present but ten-dimensional supersymmetry is absent. In this approach two-dimensional fermion string fields make it possible to give a unified description of hadron and lepton degrees of freedom and of its dynamics. This model allows to solve the problem of elimination of the most part of parity twins in the baryon spectrum. One-loop (and many-loops perhaps) amplitudes in this model are finite due to the extended set of supergauge constraints and to the significant excess of the total number of fermion two-dimensional fields over the number of boson 2-d fields.

title: Nonplanar dual model with arbitrary intercept $alpha$(0)

title: Production of high-energy muons in extensive air showers from primary el rays
abstract: The primary mechanism for the production of high-energy muons (E/sub / > 5 TeV) in extensive air showers from primary el rays is the production of muon pairs by shower photons in the field of a nucleus.

title: Superfermionic superconformal string model

title: Quasi-stable states in the physical spectrum of the Neveu-Schwarz dual model
abstract: A certain class of states, comprising most of the spectrum for large mass M, is distinguished in the spectum of physical states predicted by the Neveu-Schwarz dual model with intercepts ..cap alpha../sub rho/(0) =1 and ..cap alpha../sub ..pi../(0) =1/2. The massive particles with large spins in this class are quasi-stable. Their couplings with all the other states are of order M/sup -1/ in comparison with the ordinary vertices. For the critical dimensions D=10 these states coincide with the zero-norm spurions. For the anomalous dimensions D=9 some of the quasi-stable states become new zero-norm spurion states.

title: First measurement of the head–tail directional nuclear recoil signature at energies relevant to WIMP dark matter searches
abstract: We present first evidence for the so-called head–tail directional signature of neutron-induced nuclear recoil tracks at energies down to 1.5 keV/amu using the DRIFT-IIc dark matter detector. This regime is appropriate for recoils induced by Weakly Interacting Massive Particle (WIMPs) but one where the differential ionization is poorly understood. We show that the distribution of recoil energies and directions induced here by 252 Cf neutrons matches well that expected from massive WIMPs. The results open a powerful new means of searching for a galactic signature from WIMPs.

title: A Dual Model for Fermions Without Parity Degeneracy on the Principal Trajectory

title: Upper limit on the prompt muon flux derived from the LVD underground experiment
abstract: M.Aglietta, B.Alpat, E.D.Alyea, P.Antonioli, G.Badino, G.Bari, M.Basile, V.S.Berezinsky, , G.Bonoli, A.Bosco, G.Bruni, G.Cara Romeo, C.Castagnoli, A.Castellina, A.Chiavassa, J.A.Chinellato, L.Cifarelli1,†, F.Cindolo, G.Conforto, A.Contin, V.L.Dadykin, A.De Silva, M.Deutsch, P.Dominici, L.G.Dos Santos, L.Emaldi, R.I.Enikeev, F.L.Fabbri, W.Fulgione, P.Galeotti, C.Ghetti, P.Ghia, P.Giusti, R.Granella, F.Grianti, G.Guidi, E.S.Hafen, P.Haridas, G.Iacobucci, N.Inoue, E.Kemp, F.F.Khalchukov, E.V.Korolkova, P.V.Korchaguin, V.B.Korchaguin, V.A.Kudryavtsev10,‡, K.Lau, M.Luvisetto, G.Maccarone, A.S.Malguin,   J.Moromisato, R.Nania, G.Navarra, L.Panaro, L.Periale, A.Pesci, P.Picchi, L.Pinsky, I.A.Pless, J.Pyrlik, V.G.Ryasny, O.G.Ryazhskaya, O.Saavedra, K.Saitoh, S.Santini, G.Sartorelli, M.Selvi, N.Taborgna, V.P.Talochkin, J.Tang, G.C.Trinchero,  T.Wada, R.Weinstein, M.Widgoff, V.F.Yakushev, I.Yamamoto, G.T.Zatsepin, A.Zichichi University of Bologna and INFN-Bologna, Italy Brown University, Providence, USA University of Campinas, Campinas, Brazil INFN-LNF, Frascati, Italy INFN-LNGS, Assergi, Italy University of Houston, Houston, USA Indiana University, Bloomington, USA Massachusetts Institute of Technology, Cambridge, USA Northeastern University, Boston, USA Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia Okayama University, Okayama, Japan Okayama University of Science, Okayama, Japan University of Perugia and INFN-Perugia, Italy Saitama University, Saitama, Japan Ashikaga Institute of Technology, Ashikaga, Japan Institute of Cosmo-Geophysics, CNR, Torino, University of Torino and

title: The potential of liquid xenon for WIMP search: the ZEPLIN diagnostic array
abstract: A Liquid Xenon based WIMP detector diagnostic array is currently developed by the UKDMC with the help of international collaborators. After a brief reminder on the detection principle in Liquid Xenon, the individual detectors will be described. ZEPLIN I, a detector with a 4 kg fiducial mass with a background discrimination based on Pulse Shape Analysis, is already underground and starting operation. Two setups with improved background discrimination tools (as the ionisation is also recorded) are designed and scheduled to move underground in the second half of 2001. Both of them, ZEPLIN II and ZEPLIN III, are predicted to be sensitive to rate of 0.1–0.01 events/kg/day within 2 years of data taking. Furthermore, new ideas for lower background readout devices are studied, in order to avoid the use of PhotoMultiplier Tubes (PMTs).

title: RELATIVISTIC STRING MODEL AND MULTIPLICATIVE DUAL MODEL