Giancarlo Capitani

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Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of both the pion (phi) and the target spin axis (phi(S)) about the virtual-photon direction and relative to the lepton(More)
Geographical patterns of mtDNA variation were studied in 12 Italian samples (1072 individuals) by two different spatial autocorrelation methods. Separate analyses of the frequencies of 12 restriction morphs show North-South clines, differences between Sardinia and the mainland populations, and the effects of isolation by distance. A recently developed(More)
A. Airapetian,30 N. Akopov,30 Z. Akopov,30 M. Amarian,6, 30 V.V. Ammosov,22 A. Andrus,15 E.C. Aschenauer,6 W. Augustyniak,29 R. Avakian,30 A. Avetissian,30 E. Avetissian,10 P. Bailey,15 V. Baturin,21 C. Baumgarten,19 M. Beckmann,5 S. Belostotski,21 S. Bernreuther,8 N. Bianchi,10 H.P. Blok,20, 28 J. Blümlein,6 H. Böttcher,6 A. Borissov,17 A. Borysenko,10 M.(More)
The double spin asymmetry in the (-->)e(-->)p --> e(prime)pi(+)n reaction has been measured for the first time in the resonance region for four-momentum transfer Q2 = 0.35-1.5 GeV(2). Data were taken at Jefferson Lab with the CLAS detector using a 2.6 GeV polarized electron beam incident on a polarized solid NH3 target. Comparison with predictions of(More)
Calcium sulphate dihydrate nanocrystals of 25-100 nm width have been synthesized in 100% purity and yield by means of a method--the cryo-vacuum process--consisting of rapid freezing of quasi-saturated solutions and subsequent vacuum assisted sublimation of water. Transmission electron microscopy reveals both curled nano-lamellae and smaller, irregular(More)
K. Ackerstaff, A. Airapetian, N. Akopov, I. Akushevich M. Amarian, E.C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, C. Baumgarten, M. Beckmann, St. Belostotski, J.E. Belz, Th. Benisch, S. Bernreuther, N. Bianchi, J. Blouw, H. Böttcher, A. Borissov, J. Brack, S. Brauksiepe, B. Braun, B. Bray, St. Brons, W. Brückner, A. Brüll, E.E.W. Bruins,(More)
Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q2 dependence of the magnetic (M1+), electric (E1+), and scalar (S1+) multipoles in the gamma*p-->Delta(+)-->p pi(0)(More)
A. Airapetian, N. Akopov, Z. Akopov, M. Amarian, 32 V.V. Ammosov, A. Andrus, E.C. Aschenauer, W. Augustyniak, R. Avakian, A. Avetissian, E. Avetissian, P. Bailey, V. Baturin, C. Baumgarten, M. Beckmann, S. Belostotski, S. Bernreuther, N. Bianchi, H.P. Blok, 30 H. Böttcher, A. Borissov, M. Bouwhuis, J. Brack, A. Brüll, I. Brunn, G.P. Capitani, H.C. Chiang,(More)
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized deuterium target. Five helicity distributions including those for three sea quark flavors were extracted from these data together with reanalyzed previous data for(More)
A. Airapetian,32 N. Akopov,32 M. Amarian,24,27,32 E. C. Aschenauer,13,14,6 H. Avakian,10 R. Avakian,32 A. Avetissian,32 E. Avetissian,10,32 B. Bains,15 C. Baumgarten,22 M. Beckmann,12 S. Belostotski,25 J. E. Belz,28,29 Th. Benisch,8 S. Bernreuther,8 N. Bianchi,10 J. Blouw,24 H. Böttcher,6 A. Borissov,6,14 M. Bouwhuis,15 J. Brack,4 S. Brauksiepe,12 B.(More)