Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Measurement of the W boson polarisation in t(t)over-barevents from pp collisions at root s=8 TeV in the lepton plus jets channel with ATLAS
KTH, Skolan för teknikvetenskap (SCI), Fysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
Vise andre og tillknytning
Rekke forfattare: 28352017 (engelsk)Inngår i: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 77, nr 4, artikkel-id 264Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper presents a measurement of the polarisation of W bosons from t (t) over bar t decays, reconstructed in events with one high-p(T) lepton and at least four jets. Data from pp collisions at the LHC were collected at root s = 8 TeV and correspond to an integrated luminosity of 20.2 fb(-1). The angle theta* between the b-quark from the top quark decay and a direct W boson decay product in the W boson rest frame is sensitive to the W boson polarisation. Two different W decay products are used as polarisation analysers: the charged lepton and the down-type quark for the leptonically and hadronically decaying W boson, respectively. The most precise measurement of the W boson polarisation via the distribution of cos theta* is obtained using the leptonic analyser and events in which at least two of the jets are tagged as b-quark jets. The fitted fractions of longitudinal, left-and right-handed polarisation states are F-0 = 0.709 +/- 0.019, F-L = 0.299 +/- 0.015 and F-R = - 0.008 +/- 0.014, and are the most precisely measured W boson polarisation fractions to date. Limits on anomalous couplings of the W tb vertex are set.

sted, utgiver, år, opplag, sider
Springer-Verlag New York, 2017. Vol. 77, nr 4, artikkel-id 264
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-208981ISI: 000400235900001PubMedID: 28515670Scopus ID: 2-s2.0-85018254033OAI: oai:DiVA.org:kth-208981DiVA, id: diva2:1109368
Merknad

QC 20170614

Tilgjengelig fra: 2017-06-14 Laget: 2017-06-14 Sist oppdatert: 2017-06-14bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

PubMedScopus

Søk i DiVA

Av forfatter/redaktør
Kastanas, Konstatinos A.Lund-Jensen, BengtSidebo, EdvinStrandberg, Jonas
Av organisasjonen
I samme tidsskrift
European Physical Journal C

Søk utenfor DiVA

GoogleGoogle Scholar

pubmed
urn-nbn

Altmetric

pubmed
urn-nbn
Totalt: 113 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf