Measurement of the Lepton Charge Asymmetry in W -Boson Decays Produced in p{ovr p} Collisions

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Physical Review Letters

OSTI ID:300160

Blair, R E; Byrum, K L; Kovacs, E; Kuhlmann, S E; LeCompte, T; Nodulman, L ^[1]; Breccia, L; Brunetti, R; Deninno, M; Fiori, I; Mazzanti, P ^[2]; Behrends, S; Bensinger, J; Blocker, C; Kirsch, L; Lamoureux, J I ^[3]; Bonushkin, Y; Hauser, J; Lindgren, M ^[4]; Amadon, A ; Berryhill, J; Contreras, M; Culbertson, R; Frisch, H; Grosso-Pilcher, C; Hohlmann, M ^[5]; Cronin-Hennessy, D; Dittmann, J R; Goshaw, A T; Khazins, D; Kowald, W; Oh, S H ^[6]; Albrow, M G; Atac, M; Beretvas, A; Berge, J P; Biery, K; Binkley, M; Buckley-Geer, E; Byon-Wagner, A; Chlebana, F; Cihangir, S; Cooper, J; DeJongh, F; Demina, R; Derwent, P F; Elias, J E; Erdmann, W; Flaugher, B; Foster, G W; Freeman, J; Geer, S; Hahn, S R; Harris, R M; Incandela, J; Jensen, H; Joshi, U; Kennedy, R D; Kephart, R; Lammel, S; Lewis, J D; Limon, P; Lukens, P; Maeshima, K; Marriner, J P; Miao, T; Mukherjee, A; Nelson, C; Newman-Holmes, C; Patrick, J ^[7]; Klimenko, S; Konigsberg, J; Korytov, A; Nomerotski, A ^[8]; Barone, M; Bertolucci, S; Cordelli, M; DellAgnello, S; Giromini, P; Happacher, F; Miscetti, S; Parri, A ^[9]; Clark, A G; Couyoumtzelis, C; Kambara, H ^[10]; Baumann, T; Franklin, M; Gordon, A; Hamilton, R; Huth, J; others, and

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1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna (Italy)
3. Brandeis University, Waltham, Massachusetts 02254 (United States)
4. University of California at Los Angeles, Los Angeles, California 90024 (United States)
5. University of Chicago, Chicago, Illinois 60637 (United States)
6. Duke University, Durham, North Carolina 27708 (United States)
7. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
8. University of Florida, Gainesville, Florida 32611 (United States)
9. Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati (Italy)
10. University of Geneva, CH-1211, Geneva 4 (Switzerland)

We describe a measurement of the charge asymmetry of leptons from W -boson decays in the rapidity range 0{lt}{vert_bar}y{sub l}{vert_bar}{lt}2.5 using W{r_arrow}e{nu},thinsp{mu}{nu} events from 110{plus_minus}7 pb{sup {minus}1} of data collected by the CDF detector during 1992{endash}1995. The asymmetry data constrain the ratio of d and u quark momentum distributions in the proton over the x range of 0.006 to 0.34 at Q{sup 2}{approx}M{sup 2}{sub W} . The asymmetry predictions that use parton distribution functions obtained from previously published CDF data in the central rapidity region (0.0{lt}{vert_bar}y{sub l}{vert_bar}{lt}1.1 ) do not agree with the new data in the large rapidity region ({vert_bar}y{sub l}{vert_bar}{gt}1.1 ). {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 300160
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
D QUARKS
ELECTRIC CHARGES
FERMILAB COLLIDER DETECTOR
MUONS
NEUTRINOS
PARTICLE DECAY
PARTON MODEL
QUARKS
U QUARKS
W MINUS BOSONS
W PLUS BOSONS