Events with isolated leptons and missing transverse momentum and measurement of W production at HERA
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Events with high energy isolated electrons, muons or tau leptons and missing transverse momentum are studied using the full e(+/-)p data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb(-1). Within the Standard Model, events with isolated leptons and missing transverse momentum mainly originate from the production of single W bosons. The total single W boson production cross section is measured as 1.14 +/- 0.25 (stat.) +/- 0.14 (sys.) pb, in agreement with the Standard Model expectation. The data are also used to establish limits on the WW gamma gauge couplings and for a measurement of the W boson polarisation.
Извор:European Physical Journal C. Particles and Fields, 2009, 64, 2, 251-271
- FNRS-FWO-Vlaanderen, IISN-IIKW, IWT, Interuniversity Attraction Poles Programme, Belgian Science Policy, Polish Ministry of Science and Higher Education [PBS/DESY/70/2006], Deutsche Forschungsgemeinschaft, VEGA SR [2/7062/27], Ministry of Education of the Czech Republic [lLC527, INGO-1P05LA259, MSM0021620859], Swiss National Science Foundation, CONACYT, Mexico [48778-F], Russian Foundation for Basic Research (RFBR) [1329.2008.2], European Social Fund, National Resources, EPEAEK II, PYTHAGORAS II