Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays
Abstract The decays B s 0 $$ {\mathrm{B}}_{\mathr...
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dmit-1721.1-1320312021-09-21T03:15:46Z Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Abstract The decays B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− are studied using a data set corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The decays B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J / ψK ∗ 0 K ¯ ∗ 0 $$ \mathrm{J}/{\uppsi \mathrm{K}}^{\ast 0}{\overline{\mathrm{K}}}^{\ast 0} $$ and B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → χc1(3872)K+K−, where the K+K−pair does not originate from a ϕ meson, are observed for the first time. Precise measurements of the ratios of branching fractions between intermediate χc1(3872)ϕ, J / ψK ∗ 0 K ¯ ∗ 0 $$ \mathrm{J}/{\uppsi \mathrm{K}}^{\ast 0}{\overline{\mathrm{K}}}^{\ast 0} $$ , ψ(2S)ϕ and χc1(3872)K+K− states are reported. A structure, denoted as X(4740), is observed in the J/ψϕ mass spectrum and, assuming a Breit-Wigner parameterisation, its mass and width are determined to be m X 4740 = 4741 ± 6 ± 6 MeV / c 2 , Γ X 4740 = 53 ± 15 ± 11 MeV , $$ {\displaystyle \begin{array}{c}{m}_{\mathrm{X}(4740)}=4741\pm 6\pm 6\kern0.5em \mathrm{MeV}/{c}^2,\\ {}{\Gamma}_{\mathrm{X}(4740)}=53\pm 15\pm 11\kern0.5em \mathrm{MeV},\end{array}} $$ where the first uncertainty is statistical and the second is systematic. In addition, the most precise single measurement of the mass of the B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ meson is performed and gives a value of m B s 0 = 5366.98 ± 0.07 ± 0.13 MeV / c 2 . $$ {m}_{{\mathrm{B}}_{\mathrm{s}}^0}=5366.98\pm 0.07\pm 0.13\kern0.5em \mathrm{MeV}/{c}^2. $$ 2021-09-20T17:41:33Z 2021-09-20T17:41:33Z 2021-02-02 2021-02-11T16:27:58Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132031 Journal of High Energy Physics. 2021 Feb 02;2021(2):24 PUBLISHER_CC en https://doi.org/10.1007/JHEP02(2021)024 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
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Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. |
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Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays |
author_facet |
Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. |
author_sort |
Aaij, R. |
title |
Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays |
title_short |
Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays |
title_full |
Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays |
title_fullStr |
Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays |
title_full_unstemmed |
Study of B s 0 $$ {\mathrm{B}}_{\mathrm{s}}^0 $$ → J/ψπ+π−K+K− decays |
title_sort |
study of b s 0 $$ {\mathrm{b}}_{\mathrm{s}}^0 $$ → j/ψπ+π−k+k− decays |
publisher |
Springer Berlin Heidelberg |
publishDate |
2021 |
url |
https://hdl.handle.net/1721.1/132031 |
work_keys_str_mv |
AT aaijr studyofbs0mathrmbmathrms0jpsppkkdecays AT abellanbetetac studyofbs0mathrmbmathrms0jpsppkkdecays AT ackernleyt studyofbs0mathrmbmathrms0jpsppkkdecays AT adevab studyofbs0mathrmbmathrms0jpsppkkdecays AT adinolfim studyofbs0mathrmbmathrms0jpsppkkdecays AT afsharniah studyofbs0mathrmbmathrms0jpsppkkdecays AT aidalaca studyofbs0mathrmbmathrms0jpsppkkdecays AT aiolas studyofbs0mathrmbmathrms0jpsppkkdecays AT ajaltouniz studyofbs0mathrmbmathrms0jpsppkkdecays AT akars studyofbs0mathrmbmathrms0jpsppkkdecays AT albrechtj studyofbs0mathrmbmathrms0jpsppkkdecays AT alessiof studyofbs0mathrmbmathrms0jpsppkkdecays AT alexanderm studyofbs0mathrmbmathrms0jpsppkkdecays AT alfonsoalberoa studyofbs0mathrmbmathrms0jpsppkkdecays AT aliouchez studyofbs0mathrmbmathrms0jpsppkkdecays |
_version_ |
1737723386579124224 |
description |
Abstract
The decays
B
s
0
$$ {\mathrm{B}}_{\mathrm{s}}^0 $$
→ J/ψπ+π−K+K− are studied using a data set corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The decays
B
s
0
$$ {\mathrm{B}}_{\mathrm{s}}^0 $$
→
J
/
ψK
∗
0
K
¯
∗
0
$$ \mathrm{J}/{\uppsi \mathrm{K}}^{\ast 0}{\overline{\mathrm{K}}}^{\ast 0} $$
and
B
s
0
$$ {\mathrm{B}}_{\mathrm{s}}^0 $$
→ χc1(3872)K+K−, where the K+K−pair does not originate from a ϕ meson, are observed for the first time. Precise measurements of the ratios of branching fractions between intermediate χc1(3872)ϕ,
J
/
ψK
∗
0
K
¯
∗
0
$$ \mathrm{J}/{\uppsi \mathrm{K}}^{\ast 0}{\overline{\mathrm{K}}}^{\ast 0} $$
, ψ(2S)ϕ and χc1(3872)K+K− states are reported. A structure, denoted as X(4740), is observed in the J/ψϕ mass spectrum and, assuming a Breit-Wigner parameterisation, its mass and width are determined to be
m
X
4740
=
4741
±
6
±
6
MeV
/
c
2
,
Γ
X
4740
=
53
±
15
±
11
MeV
,
$$ {\displaystyle \begin{array}{c}{m}_{\mathrm{X}(4740)}=4741\pm 6\pm 6\kern0.5em \mathrm{MeV}/{c}^2,\\ {}{\Gamma}_{\mathrm{X}(4740)}=53\pm 15\pm 11\kern0.5em \mathrm{MeV},\end{array}} $$
where the first uncertainty is statistical and the second is systematic. In addition, the most precise single measurement of the mass of the
B
s
0
$$ {\mathrm{B}}_{\mathrm{s}}^0 $$
meson is performed and gives a value of
m
B
s
0
=
5366.98
±
0.07
±
0.13
MeV
/
c
2
.
$$ {m}_{{\mathrm{B}}_{\mathrm{s}}^0}=5366.98\pm 0.07\pm 0.13\kern0.5em \mathrm{MeV}/{c}^2. $$ |