Events with an isolated lepton and missing transverse momentum and measurement of W production at HERA


Aaron F., Abramowicz H., Abt I., Adamczyk L., Adamus M., Aldaya Martin M., ...Daha Fazla

Journal of High Energy Physics, cilt.2010, sa.3, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2010 Sayı: 3
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1007/jhep03(2010)035
  • Dergi Adı: Journal of High Energy Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Lepton-nucleon scattering
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

A search for events containing an isolated electron or muon and missing transverse momentum produced in e±p collisions is performed with the H1 and ZEUS detectors at HERA. The data were taken in the period 1994-2007 and correspond to an integrated luminosity of 0.98 fb-1. The observed event yields are in good overall agreement with the Standard Model prediction, which is dominated by single W production. In the e+p data, at large hadronic transverse momentum PTX < 25GeV, a total of 23 events are observed compared to a prediction of 14.0 ±1.9. The total single W boson production cross section is measured as 1.06 ± 0.16 (stat.) ± 0.07 (sys.) pb, in agreement with an Standard Model (SM) expectation of 1.26 ± 0.19 pb.