Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay
Abstract The rare decay B ¯ $$ \overline{B} $$ → X s γ is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1/m b and are related to operators other than Q 7γ...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-11-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP11(2019)141 |
| _version_ | 1819083274060824576 |
|---|---|
| author | Ayesh Gunawardana Gil Paz |
| author_facet | Ayesh Gunawardana Gil Paz |
| author_sort | Ayesh Gunawardana |
| collection | DOAJ |
| description | Abstract The rare decay B ¯ $$ \overline{B} $$ → X s γ is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1/m b and are related to operators other than Q 7γ in the effective weak Hamiltonian. One of the three leading contributions, Q 1 q − Q 7 γ $$ {Q}_1^q-{Q}_{7\gamma } $$ , is described by a non-local function whose moments are related to HQET parameters. We use recent progress in our knowledge of these parameters to reevaluate the resolved photon contribution to B ¯ $$ \overline{B} $$ → X s γ total rate and CP asymmetry. |
| first_indexed | 2024-12-21T20:29:57Z |
| format | Article |
| id | doaj.art-cbb6e7b263ae437095783f5475b289db |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-21T20:29:57Z |
| publishDate | 2019-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-cbb6e7b263ae437095783f5475b289db2022-12-21T18:51:17ZengSpringerOpenJournal of High Energy Physics1029-84792019-11-0120191112110.1007/JHEP11(2019)141Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decayAyesh Gunawardana0Gil Paz1Department of Physics and Astronomy, Wayne State UniversityDepartment of Physics and Astronomy, Wayne State UniversityAbstract The rare decay B ¯ $$ \overline{B} $$ → X s γ is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1/m b and are related to operators other than Q 7γ in the effective weak Hamiltonian. One of the three leading contributions, Q 1 q − Q 7 γ $$ {Q}_1^q-{Q}_{7\gamma } $$ , is described by a non-local function whose moments are related to HQET parameters. We use recent progress in our knowledge of these parameters to reevaluate the resolved photon contribution to B ¯ $$ \overline{B} $$ → X s γ total rate and CP asymmetry.http://link.springer.com/article/10.1007/JHEP11(2019)141CP violationHeavy Quark PhysicsNonperturbative Effects |
| spellingShingle | Ayesh Gunawardana Gil Paz Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay Journal of High Energy Physics CP violation Heavy Quark Physics Nonperturbative Effects |
| title | Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay |
| title_full | Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay |
| title_fullStr | Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay |
| title_full_unstemmed | Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay |
| title_short | Reevaluating uncertainties in B ¯ $$ \overline{B} $$ → X s γ decay |
| title_sort | reevaluating uncertainties in b ¯ overline b x s γ decay |
| topic | CP violation Heavy Quark Physics Nonperturbative Effects |
| url | http://link.springer.com/article/10.1007/JHEP11(2019)141 |
| work_keys_str_mv | AT ayeshgunawardana reevaluatinguncertaintiesinboverlinebxsgdecay AT gilpaz reevaluatinguncertaintiesinboverlinebxsgdecay |