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...
| Hlavní autoři: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
2012
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| _version_ | 1826294627259383808 |
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| 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 |
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