Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV
In a study of the reaction e - e +→W - W + with the DELPHI detector, the probabilities of the two W particles occurring in the joint polarisation states transverse-transverse (TT), longitudinal-transverse plus transverse-longitudinal (LT) and longitudinal-longitudinal (LL) have been determined using...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2009
|
| _version_ | 1826303244701270016 |
|---|---|
| author | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, J Augustinus, A Baillon, P Ballestrero, A Bambade, P |
| author_facet | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, J Augustinus, A Baillon, P Ballestrero, A Bambade, P |
| author_sort | Abdallah, J |
| collection | OXFORD |
| description | In a study of the reaction e - e +→W - W + with the DELPHI detector, the probabilities of the two W particles occurring in the joint polarisation states transverse-transverse (TT), longitudinal-transverse plus transverse-longitudinal (LT) and longitudinal-longitudinal (LL) have been determined using the final states WW→lvnq̄q (l=e,μ). The two-particle joint polarisation probabilities, i.e. the spin density matrix elements ρ TT, ρ LT, ρ LL, are measured as functions of the W - production angle, W-at an average reaction energy of 198.2 GeV. Averaged over all W-, the following joint probabilities are obtained: ̄ TT=(67\pm8)\%,̄ LT=(30\pm8)\%̄LL=(3\pm7)\%.These results are in agreement with the Standard Model predictions of 63.0%, 28.9% and 8.1%, respectively. The related polarisation cross-sections σ TT, σ LT and σ LL are also presented. © 2009 Springer-Verlag / Società Italiana di Fisica. |
| first_indexed | 2024-03-07T05:59:43Z |
| format | Journal article |
| id | oxford-uuid:ebbf046e-b87f-4fac-aee4-1cd59aea721d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:59:43Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:ebbf046e-b87f-4fac-aee4-1cd59aea721d2022-03-27T11:12:16ZCorrelations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeVJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ebbf046e-b87f-4fac-aee4-1cd59aea721dEnglishSymplectic Elements at Oxford2009Abdallah, JAbreu, PAdam, WAdzic, PAlbrecht, TAlemany-Fernandez, RAllmendinger, TAllport, PAmaldi, UAmapane, NAmato, SAnashkin, EAndreazza, AAndringa, SAnjos, NAntilogus, PApel, WArnoud, YAsk, SAsman, BAugustin, JAugustinus, ABaillon, PBallestrero, ABambade, PIn a study of the reaction e - e +→W - W + with the DELPHI detector, the probabilities of the two W particles occurring in the joint polarisation states transverse-transverse (TT), longitudinal-transverse plus transverse-longitudinal (LT) and longitudinal-longitudinal (LL) have been determined using the final states WW→lvnq̄q (l=e,μ). The two-particle joint polarisation probabilities, i.e. the spin density matrix elements ρ TT, ρ LT, ρ LL, are measured as functions of the W - production angle, W-at an average reaction energy of 198.2 GeV. Averaged over all W-, the following joint probabilities are obtained: ̄ TT=(67\pm8)\%,̄ LT=(30\pm8)\%̄LL=(3\pm7)\%.These results are in agreement with the Standard Model predictions of 63.0%, 28.9% and 8.1%, respectively. The related polarisation cross-sections σ TT, σ LT and σ LL are also presented. © 2009 Springer-Verlag / Società Italiana di Fisica. |
| spellingShingle | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, J Augustinus, A Baillon, P Ballestrero, A Bambade, P Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV |
| title | Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV |
| title_full | Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV |
| title_fullStr | Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV |
| title_full_unstemmed | Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV |
| title_short | Correlations between polarisation states of W particles in the reaction e(-)e(+)-> W-W+ at LEP2 energies 189-209 GeV |
| title_sort | correlations between polarisation states of w particles in the reaction e e gt w w at lep2 energies 189 209 gev |
| work_keys_str_mv | AT abdallahj correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT abreup correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT adamw correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT adzicp correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT albrechtt correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT alemanyfernandezr correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT allmendingert correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT allportp correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT amaldiu correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT amapanen correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT amatos correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT anashkine correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT andreazzaa correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT andringas correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT anjosn correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT antilogusp correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT apelw correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT arnoudy correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT asks correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT asmanb correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT augustinj correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT augustinusa correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT baillonp correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT ballestreroa correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev AT bambadep correlationsbetweenpolarisationstatesofwparticlesinthereactioneegtwwatlep2energies189209gev |