Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h−
Abstract A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states...
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2021
|
| Online Access: | https://hdl.handle.net/1721.1/132096 |
| _version_ | 1826207374653784064 |
|---|---|
| author | Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. |
| author_sort | Aaij, R. |
| collection | MIT |
| description | Abstract
A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states
K
S
0
$$ {K}_{\mathrm{S}}^0 $$
π+π− and
K
S
0
$$ {K}_{\mathrm{S}}^0 $$
K+K− (commonly denoted
K
S
0
$$ {K}_{\mathrm{S}}^0 $$
h+h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb−1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be
68.7
−
5.1
+
5.2
°
$$ \left({68.7}_{-5.1}^{+5.2}\right){}^{\circ} $$
. The hadronic parameters
r
B
DK
,
r
B
Dπ
,
δ
B
DK
,
and
δ
B
Dπ
$$ {r}_B^{D K},{r}_B^{D\pi},{\delta}_B^{D K},\kern0.5em \mathrm{and}\kern0.5em {\delta}_B^{D\pi} $$
, which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported. |
| first_indexed | 2024-09-23T13:48:20Z |
| format | Article |
| id | mit-1721.1/132096 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:48:20Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1320962023-12-12T19:27:36Z Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Massachusetts Institute of Technology. Department of Physics Abstract A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states K S 0 $$ {K}_{\mathrm{S}}^0 $$ π+π− and K S 0 $$ {K}_{\mathrm{S}}^0 $$ K+K− (commonly denoted K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb−1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be 68.7 − 5.1 + 5.2 ° $$ \left({68.7}_{-5.1}^{+5.2}\right){}^{\circ} $$ . The hadronic parameters r B DK , r B Dπ , δ B DK , and δ B Dπ $$ {r}_B^{D K},{r}_B^{D\pi},{\delta}_B^{D K},\kern0.5em \mathrm{and}\kern0.5em {\delta}_B^{D\pi} $$ , which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported. 2021-09-20T17:41:56Z 2021-09-20T17:41:56Z 2021-02-19 2021-04-04T04:01:53Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132096 Journal of High Energy Physics. 2021 Feb 19;2021(2):169 PUBLISHER_CC en https://doi.org/10.1007/JHEP02(2021)169 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− |
| title | Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− |
| title_full | Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− |
| title_fullStr | Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− |
| title_full_unstemmed | Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− |
| title_short | Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → K S 0 $$ {K}_{\mathrm{S}}^0 $$ h+h− |
| title_sort | measurement of the ckm angle γ in b dk and b dπ decays with d k s 0 k mathrm s 0 h h |
| url | https://hdl.handle.net/1721.1/132096 |
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