http://marh1.in2p3.fr/users/diaconu/particule/rompart.html Tur de orizont si mijloc de afirmare ale participarii stiintifice romanesti la activitatile Laboratorului European de Fizica Particulelor (CERN), aceasta intilnire periodica isi propune sa faciliteze schimbul de informatii intre grupurile din Romania membre in diferitele experiente de fizica particulelor la CERN. In acelasi timp urmareste intarirea coerentei in subiectele de fizica abordate,

Multi-electron production is studied at high electron transverse momentum in positron- and electron-proton collisions using the H1 detector at HERA. The data correspond to an integrated luminosity of 115 pb-1. Di-electron and tri-electron event yields are measured. Cross sections are derived in a restricted phase space region dominated by photon-photon collisions. In general good agreement is found with the Standard Model predictions. However, for

Articolul analizeaza evenimente ce contin lepton incarcati (electroni sau muoni) impreuna cu impuls transvers lipsa observate in coliziuni electron-proton la acceleratorul HERA cu experimentul H1. In cadrul Modelului Standard, aceste evenimente sunt explicate de producerea simple bozonului W. Numarul si distributia in impuls transvers sunt totusi atipice, in special observatia catorva evenimente cu impuls transvers hadronic important, intr-o regiune

A search for events with an imbalance in transverse momentum and with isolated high energy leptons has been carried out at the positron-proton collider HERA. One event with an e^- and five events with a mu^+- are found together with evidence for undetected particles carrying transverse momentum. Within the Standard Model the dominant origin of events with this kind of topology is the production of W bosons with subsequent leptonic decay. Three of