Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ.
We present a measurement of the time-dependent CP-violating asymmetry in B(s)(0) → J/ψϕ decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B(s)(0) → J/ψϕ is characterized by the decay widths Γ(H) and Γ(L) of the heavy and light mass eigenstates, respective...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1826267435729158144 |
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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 | We present a measurement of the time-dependent CP-violating asymmetry in B(s)(0) → J/ψϕ decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B(s)(0) → J/ψϕ is characterized by the decay widths Γ(H) and Γ(L) of the heavy and light mass eigenstates, respectively, of the B(s)(0) - B(s)(0) system and by a CP-violating phase ϕ(s). In a sample of about 8500 B(s)(0) → J/ψϕ events isolated from 0.37 fb(-1) of pp collisions at sqrt[s] = 7 TeV, we measure ϕ(s) = 0.15 ± 0.18(stat) ± 0.06(syst) rad. We also find an average B(s)(0) decay width Γ(s) ≡ (Γ(L) + Γ(H))/2 = 0.657 ± 0.009(stat) ± 0.008(syst) ps(-1) and a decay width difference ΔΓ(s) ≡ Γ(L) - Γ(H) = 0.123 ± 0.029(stat) ± 0.011(syst) ps(-1). Our measurement is insensitive to the transformation (ϕ(s),ΔΓ(s)) ↦ (π - ϕ(s), -ΔΓ(s)). |
| first_indexed | 2024-03-06T20:54:10Z |
| format | Journal article |
| id | oxford-uuid:389a23c2-0d63-4e09-8691-66cd5a076dc2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:54:10Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:389a23c2-0d63-4e09-8691-66cd5a076dc22022-03-26T13:51:12ZMeasurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:389a23c2-0d63-4e09-8691-66cd5a076dc2EnglishSymplectic 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, SWe present a measurement of the time-dependent CP-violating asymmetry in B(s)(0) → J/ψϕ decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B(s)(0) → J/ψϕ is characterized by the decay widths Γ(H) and Γ(L) of the heavy and light mass eigenstates, respectively, of the B(s)(0) - B(s)(0) system and by a CP-violating phase ϕ(s). In a sample of about 8500 B(s)(0) → J/ψϕ events isolated from 0.37 fb(-1) of pp collisions at sqrt[s] = 7 TeV, we measure ϕ(s) = 0.15 ± 0.18(stat) ± 0.06(syst) rad. We also find an average B(s)(0) decay width Γ(s) ≡ (Γ(L) + Γ(H))/2 = 0.657 ± 0.009(stat) ± 0.008(syst) ps(-1) and a decay width difference ΔΓ(s) ≡ Γ(L) - Γ(H) = 0.123 ± 0.029(stat) ± 0.011(syst) ps(-1). Our measurement is insensitive to the transformation (ϕ(s),ΔΓ(s)) ↦ (π - ϕ(s), -ΔΓ(s)). |
| 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 Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ. |
| title | Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ. |
| title_full | Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ. |
| title_fullStr | Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ. |
| title_full_unstemmed | Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ. |
| title_short | Measurement of the CP-violating phase ϕ(s) in the decay B(s)(0) → J/ψϕ. |
| title_sort | measurement of the cp violating phase ϕ s in the decay b s 0 j ψϕ |
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