Determination of the sign of the decay width difference in the B(s)(0) system.
The interference between the K+ K- S-wave and P-wave amplitudes in B(s)(0) → J/ψK+ K- decays with the K+ K- pairs in the region around the ϕ(1020) resonance is used to determine the variation of the difference of the strong phase between these amplitudes as a function of K+ K- invariant mass. Combin...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2012
|
| _version_ | 1826294627259383808 |
|---|---|
| author | Aaij, R Abellan Beteta, C Adeva, B Adinolfi, M Adrover, C Affolder, A Ajaltouni, Z Albrecht, J Alessio, F Alexander, M Alkhazov, G Alvarez Cartelle, P Alves, A Amato, S Amhis, Y Anderson, J Appleby, R Aquines Gutierrez, O Archilli, F Arrabito, L Artamonov, A Artuso, M Aslanides, E Auriemma, G Bachmann, S |
| author_facet | Aaij, R Abellan Beteta, C Adeva, B Adinolfi, M Adrover, C Affolder, A Ajaltouni, Z Albrecht, J Alessio, F Alexander, M Alkhazov, G Alvarez Cartelle, P Alves, A Amato, S Amhis, Y Anderson, J Appleby, R Aquines Gutierrez, O Archilli, F Arrabito, L Artamonov, A Artuso, M Aslanides, E Auriemma, G Bachmann, S |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | The interference between the K+ K- S-wave and P-wave amplitudes in B(s)(0) → J/ψK+ K- decays with the K+ K- pairs in the region around the ϕ(1020) resonance is used to determine the variation of the difference of the strong phase between these amplitudes as a function of K+ K- invariant mass. Combined with the results from our CP asymmetry measurement in B(s)(0) → J/ψϕ decays, we conclude that the B(s)(0) mass eigenstate that is almost CP = +1 is lighter and decays faster than the mass eigenstate that is almost CP = -1. This determines the sign of the decay width difference ΔΓ(s) ≡ Γ(L) - Γ(H) to be positive. Our result also resolves the ambiguity in the past measurements of the CP violating phase ϕ(s) to be close to zero rather than π. These conclusions are in agreement with the standard model expectations. |
| first_indexed | 2024-03-07T03:48:35Z |
| format | Journal article |
| id | oxford-uuid:c06ac89c-1a10-43f8-961c-c20e9005f3af |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:48:35Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:c06ac89c-1a10-43f8-961c-c20e9005f3af2022-03-27T05:54:15ZDetermination of the sign of the decay width difference in the B(s)(0) system.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c06ac89c-1a10-43f8-961c-c20e9005f3afEnglishSymplectic Elements at Oxford2012Aaij, RAbellan Beteta, CAdeva, BAdinolfi, MAdrover, CAffolder, AAjaltouni, ZAlbrecht, JAlessio, FAlexander, MAlkhazov, GAlvarez Cartelle, PAlves, AAmato, SAmhis, YAnderson, JAppleby, RAquines Gutierrez, OArchilli, FArrabito, LArtamonov, AArtuso, MAslanides, EAuriemma, GBachmann, SThe interference between the K+ K- S-wave and P-wave amplitudes in B(s)(0) → J/ψK+ K- decays with the K+ K- pairs in the region around the ϕ(1020) resonance is used to determine the variation of the difference of the strong phase between these amplitudes as a function of K+ K- invariant mass. Combined with the results from our CP asymmetry measurement in B(s)(0) → J/ψϕ decays, we conclude that the B(s)(0) mass eigenstate that is almost CP = +1 is lighter and decays faster than the mass eigenstate that is almost CP = -1. This determines the sign of the decay width difference ΔΓ(s) ≡ Γ(L) - Γ(H) to be positive. Our result also resolves the ambiguity in the past measurements of the CP violating phase ϕ(s) to be close to zero rather than π. These conclusions are in agreement with the standard model expectations. |
| spellingShingle | Aaij, R Abellan Beteta, C Adeva, B Adinolfi, M Adrover, C Affolder, A Ajaltouni, Z Albrecht, J Alessio, F Alexander, M Alkhazov, G Alvarez Cartelle, P Alves, A Amato, S Amhis, Y Anderson, J Appleby, R Aquines Gutierrez, O Archilli, F Arrabito, L Artamonov, A Artuso, M Aslanides, E Auriemma, G Bachmann, S Determination of the sign of the decay width difference in the B(s)(0) system. |
| title | Determination of the sign of the decay width difference in the B(s)(0) system. |
| title_full | Determination of the sign of the decay width difference in the B(s)(0) system. |
| title_fullStr | Determination of the sign of the decay width difference in the B(s)(0) system. |
| title_full_unstemmed | Determination of the sign of the decay width difference in the B(s)(0) system. |
| title_short | Determination of the sign of the decay width difference in the B(s)(0) system. |
| title_sort | determination of the sign of the decay width difference in the b s 0 system |
| work_keys_str_mv | AT aaijr determinationofthesignofthedecaywidthdifferenceinthebs0system AT abellanbetetac determinationofthesignofthedecaywidthdifferenceinthebs0system AT adevab determinationofthesignofthedecaywidthdifferenceinthebs0system AT adinolfim determinationofthesignofthedecaywidthdifferenceinthebs0system AT adroverc determinationofthesignofthedecaywidthdifferenceinthebs0system AT affoldera determinationofthesignofthedecaywidthdifferenceinthebs0system AT ajaltouniz determinationofthesignofthedecaywidthdifferenceinthebs0system AT albrechtj determinationofthesignofthedecaywidthdifferenceinthebs0system AT alessiof determinationofthesignofthedecaywidthdifferenceinthebs0system AT alexanderm determinationofthesignofthedecaywidthdifferenceinthebs0system AT alkhazovg determinationofthesignofthedecaywidthdifferenceinthebs0system AT alvarezcartellep determinationofthesignofthedecaywidthdifferenceinthebs0system AT alvesa determinationofthesignofthedecaywidthdifferenceinthebs0system AT amatos determinationofthesignofthedecaywidthdifferenceinthebs0system AT amhisy determinationofthesignofthedecaywidthdifferenceinthebs0system AT andersonj determinationofthesignofthedecaywidthdifferenceinthebs0system AT applebyr determinationofthesignofthedecaywidthdifferenceinthebs0system AT aquinesgutierrezo determinationofthesignofthedecaywidthdifferenceinthebs0system AT archillif determinationofthesignofthedecaywidthdifferenceinthebs0system AT arrabitol determinationofthesignofthedecaywidthdifferenceinthebs0system AT artamonova determinationofthesignofthedecaywidthdifferenceinthebs0system AT artusom determinationofthesignofthedecaywidthdifferenceinthebs0system AT aslanidese determinationofthesignofthedecaywidthdifferenceinthebs0system AT auriemmag determinationofthesignofthedecaywidthdifferenceinthebs0system AT bachmanns determinationofthesignofthedecaywidthdifferenceinthebs0system |