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EnglishWe present a measurement of the polar-angle distribution of leptons from W boson decay, as a function of the W transverse momentum. The measurement uses an 80±4 pb-1 sample of pp̄ collisions at √s = 1.8 TeV collected by the CDF detector and includes data from both the W→e+ν and W→μ+ν decay channels. We fit the W boson transverse mass distribution to a set of templates from a Monte Carlo event generator and detector simulation in several ranges of the W transverse momentum. The measurement agrees with the standard model expectation, whereby the ratio of longitudinally to transversely polarized W bosons, in the Collins-Soper W rest frame, increases with the W transverse momentum at a rate of approximately 15% per 10 GeV/c.
| Titolo: | Measurement of the Polar-Angle Distribution of Leptons from W Boson Decay as a Function of the W Transverse Momentum in p anti-p Collisions at sqrt s = 1.8 TeV |
| Autore/i: | CASTRO, ANDREA; DENINNO, MARIA MADDALENA; L. Malferrari; P. Mazzanti; MOGGI, NICCOLO'; RIMONDI, FRANCO; F. Semeria; ZUCCHELLI, STEFANO; CDF Collaboration |
| Autore/i Unibo: | |
| Anno: | 2004 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.70.032004 |
| Abstract: | We present a measurement of the polar-angle distribution of leptons from W boson decay, as a function of the W transverse momentum. The measurement uses an 80±4 pb-1 sample of pp̄ collisions at √s = 1.8 TeV collected by the CDF detector and includes data from both the W→e+ν and W→μ+ν decay channels. We fit the W boson transverse mass distribution to a set of templates from a Monte Carlo event generator and detector simulation in several ranges of the W transverse momentum. The measurement agrees with the standard model expectation, whereby the ratio of longitudinally to transversely polarized W bosons, in the Collins-Soper W rest frame, increases with the W transverse momentum at a rate of approximately 15% per 10 GeV/c. |
| Data prodotto definitivo in UGOV: | 2005-09-26 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11585/6226
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