Search for CP violation in the phase space of D0 → π+π−π+π− decays
A search for time-integrated CP violation in the Cabibbo-suppressed decay D0 → π+π−π+π− is performed using an unbinned, model-independent technique known as the energy test. This is the first application of the energy test in four-body decays. The search is performed for P-even CP asymmetries and, f...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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Elsevier
2017
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| _version_ | 1797100695793434624 |
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| author | Aaij, R Adeva, B Adinolfi, M Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Rollings, A Topp-Joergensen, S Veneziano, G Wilkinson, G LHCb Collaboration (760 Others) |
| author_facet | Aaij, R Adeva, B Adinolfi, M Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Rollings, A Topp-Joergensen, S Veneziano, G Wilkinson, G LHCb Collaboration (760 Others) |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | A search for time-integrated CP violation in the Cabibbo-suppressed decay D0 → π+π−π+π− is performed using an unbinned, model-independent technique known as the energy test. This is the first application of the energy test in four-body decays. The search is performed for P-even CP asymmetries and, for the first time, is extended to probe the P-odd case. Using proton–proton collision data corresponding to an integrated luminosity of 3.0 fb −1 collected by the LHCb detector at centre-of-mass energies of s=7 TeV and 8 TeV, the world's best sensitivity to CP violation in this decay is obtained. The data are found to be consistent with the hypothesis of CP symmetry with a p-value of (4.6±0.5)% in the P-even case, and marginally consistent with a p-value of (0.6±0.2)% in the P-odd case, corresponding to a significance for CP non-conservation of 2.7 standard deviations. |
| first_indexed | 2024-03-07T05:41:16Z |
| format | Journal article |
| id | oxford-uuid:e5a6752b-9d1b-4056-9cd7-b087437f81f7 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:41:16Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:e5a6752b-9d1b-4056-9cd7-b087437f81f72022-03-27T10:25:44ZSearch for CP violation in the phase space of D0 → π+π−π+π− decaysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e5a6752b-9d1b-4056-9cd7-b087437f81f7Symplectic Elements at OxfordElsevier2017Aaij, RAdeva, BAdinolfi, MEvans, TGandini, PGruberg Cazon, BHadavizadeh, THarnew, NHill, DJalocha, PJohn, MJurik, NMalde, SNandi, ARollings, ATopp-Joergensen, SVeneziano, GWilkinson, GLHCb Collaboration (760 Others)A search for time-integrated CP violation in the Cabibbo-suppressed decay D0 → π+π−π+π− is performed using an unbinned, model-independent technique known as the energy test. This is the first application of the energy test in four-body decays. The search is performed for P-even CP asymmetries and, for the first time, is extended to probe the P-odd case. Using proton–proton collision data corresponding to an integrated luminosity of 3.0 fb −1 collected by the LHCb detector at centre-of-mass energies of s=7 TeV and 8 TeV, the world's best sensitivity to CP violation in this decay is obtained. The data are found to be consistent with the hypothesis of CP symmetry with a p-value of (4.6±0.5)% in the P-even case, and marginally consistent with a p-value of (0.6±0.2)% in the P-odd case, corresponding to a significance for CP non-conservation of 2.7 standard deviations. |
| spellingShingle | Aaij, R Adeva, B Adinolfi, M Evans, T Gandini, P Gruberg Cazon, B Hadavizadeh, T Harnew, N Hill, D Jalocha, P John, M Jurik, N Malde, S Nandi, A Rollings, A Topp-Joergensen, S Veneziano, G Wilkinson, G LHCb Collaboration (760 Others) Search for CP violation in the phase space of D0 → π+π−π+π− decays |
| title | Search for CP violation in the phase space of D0 → π+π−π+π− decays |
| title_full | Search for CP violation in the phase space of D0 → π+π−π+π− decays |
| title_fullStr | Search for CP violation in the phase space of D0 → π+π−π+π− decays |
| title_full_unstemmed | Search for CP violation in the phase space of D0 → π+π−π+π− decays |
| title_short | Search for CP violation in the phase space of D0 → π+π−π+π− decays |
| title_sort | search for cp violation in the phase space of d0 π π π π decays |
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