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211.
M. Calicchio O. Erriquez M.T. Fogli-Muciaccia S. Natali S. Nuzzo F. Romano F. Ruggieri R. Belusevic D.C. Colley G.T. Jones S. ONeale S.J. Sewell M.F. Votruba D. Bertrand P. Marage J. Moreels J. Sacton F.W. Bullock 《Physics letters. [Part B]》1980,93(4):521-524
An event with the decay chain Σc+ → Λc+ + π0, Λc+ → K? + p + π+, has been observed in an exposure of BEBC, equipped with a track sensitive target, to the wide band neutrino beam from the SPS at CERN. The event has a unique three constraint kinematic fit to the ΔS = ?ΔQ reaction v + p → μ? + p + K? + π+ + π+ + π0 with both gammas from the π0 decay detected. The proton and other final state particles are identified. The masses are M(Λc+) = 2290 ± 3 MeV/c2, M(Σc+) = 2457 ± 4 MeV/c2 and M(Σc+) ? M(Λc+) = 168 ± 3 MeV/c2. Including other data one obtains M (Σc++) ? M(Σc+) = 0 ± 4 MeV/c2. 相似文献
212.
H. Braun M. Cornelssen H.U. Martyn O. Erriquez S. Natali F. Romano D. Bertrand M. Csejthey-Barth J. Lemonne P. Renton P. Villain D.C. Cundy T.I. Pedersen D. Waldren 《Physics letters. [Part B]》1973,47(2):182-184
A sample of K+μ3 events, detected in the CERN 1.1 m3 heavy-liquid bubble chamber, has been used to investigate the q2 dependence of the form factors, giving ξ(0) = ?1.1 ± 1.0 and ξ(6.6m2π) = ?0.34 ± 0.20, for λ+ = 0.027. A three parameter fit gives a value for λ+ = 0.025 ± 0.017 in good agreement with the preceding Ke3 analysis. 相似文献
213.
Silvano Romano 《International journal of quantum chemistry》1981,20(4):921-926
Along the lines of previous work [S. Romano and E. Clementi, Gazz. Chim. Ital. 108 , 319 (1978); Int. J. Quantum Chem. 14 , 839 (1978); 17 , 1007 (1980)], we carried out Monte Carlo simulation on serine–water clusters (the neutral molecule and two conformers of the zwitterion) surrounded by an appropriate dielectric continuum simulating the bulk solvent. Results for clusters in vacuo and in the dielectric continuum were compared; similarities and differences could be qualitatively interpreted as produced by competition among different factors. 相似文献
214.
O. Erriquez S. Natali S. Nuzzo A. Pullia F. Romano D.C. Colley G.T. Jones L. Lowe S. ONeale S.J. Sewell G. Bertrand-Coremans H. Mulkens J. Sacton C. Vander Velde-Wilquet J. Wickens V. Brisson P. Petiau T.W. Jones 《Physics letters. [Part B]》1978,77(2):227-232
For e+ energy > 0.3 GeV and 10 GeV < visible energy < 100 GeV we find that: (i) ; (ii) 1.2 ± 0.5 neutral strange particles are produced per μ?e+ event; (iii) the lifetime of possible positron-parent particles is < 3 × 10?10 s (90% C.L.); (iv) the cross section for direct e+ production via the neutral current is < 0.2 times that via the charged current (90% C.L.); (v) the cross section for producing heavy leptons, L+, decaying into e+ … is < 0.7 × 10?3 times that for μ?production, implying M(L+) > 10 GeV. 相似文献
215.
J. Blietschau H. Deden F.J. Hasert W. Krenz J. Morfin K. Schultze L. Welch G. Bertrand-Coremans M. Dewitt H. Mulkens J. Sacton W. Van Doninck H. Wachsmuth P. Musset J.B. Pattison F. Romano K. Myklebost I. Danilchenko J. Pinfold 《Physics letters. [Part B]》1978,73(2):232-234
An upper limit of 3 × 10?42Eν cm2 per electron, at 90% confidence level, has been obtained for the cross section of the process νμ + e? → νμ + e?, interpreted in the usual V-A framework, for an electron recoil energy larger than 0.3 GeV. This estimate is based on the observation of one candidate event in exposures of Gargamelle to the CERN PS neutrino beam. 相似文献
216.
217.
Antonio Romano 《Annali di Matematica Pura ed Applicata》1974,100(1):129-151
Sunto Si determinano le equazioni approssimate del bilancio relativistico di un sistema continuo carico ed, associando ad esse la
versione relativistica della diseguaglianza di Clausius-Duhem proposta da P. M. Quan, si estendono i risultati della termodinamica
di Coleman dei materiali differenziali al caso che sia presente un campo elettromagnetico.
Lavoro eseguito nell'ambito dell'attività dei gruppi di ricerca matematica del C.N.R.
Entrata in Redazione il 27 aprile 1973. 相似文献
218.
219.
220.
Jaffe DE Mahapatra R Masek G Paar HP Asner DM Eppich A Hill TS Morrison RJ Briere RA Chen GP Ferguson T Vogel H Gritsan A Alexander JP Baker R Bebek C Berger BE Berkelman K Blanc F Boisvert V Cassel DG Drell PS Duboscq JE Ecklund KM Ehrlich R Gaidarev P Gibbons L Gittelman B Gray SW Hartill DL Heltsley BK Hopman PI Hsu L Jones CD Kandaswamy J Kreinick DL Lohner M Magerkurth A Meyer TO Mistry NB Nordberg E Palmer M Patterson JR Peterson D Riley D Romano A Thayer JG Urner D Valant-Spaight B 《Physical review letters》2001,86(22):5000-5003
We have measured the charge asymmetry in like-sign dilepton yields from B(0)B*(0) meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a(0)(ll) identical with[N(l(+)l(+))-N(l(-)l(-))]/[N(l(+)l(+))+N(l(-)l(-))] = +0.013+/-0.050+/-0.005. We combine this result with a previous, independent measurement and obtain Re(epsilon(B))/(1+ the absolute value of epsilon(B)(2)) = +0.0035+/-0.0103+/-0.0015 (uncertainties are statistical and systematic, respectively) for the CP impurity parameter, epsilon(B). 相似文献