Precision measurement of the Bc+$$ {B}_c^{+} $$ meson mass
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Author(s)
Aaij, R.
Abellán Beteta, C.
Ackernley, T.
Adeva, B.
Adinolfi, M.
Afsharnia, H.
Aidala, C. A
Aiola, S.
Ajaltouni, Z.
Akar, S.
Date Issued
July 20, 2020
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2020 Jul 20;2020(7):123
Version
Final published version
Abstract
Abstract
A precision measurement of the
B
c
+
$$ {B}_c^{+} $$
meson mass is performed using proton- proton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9.0 fb−1. The
B
c
+
$$ {B}_c^{+} $$
mesons are reconstructed via the decays
B
c
+
$$ {B}_c^{+} $$
→ J/ψπ+,
B
c
+
$$ {B}_c^{+} $$
→ J/ψπ+π−π+,
B
c
+
→
J
/
ψp
p
¯
π
+
$$ {B}_c^{+}\to J/\psi p\overline{p}{\pi}^{+} $$
,
B
c
+
→
J
/
ψ
D
s
+
$$ {B}_c^{+}\to J/\psi {D}_s^{+} $$
,
B
c
+
$$ {B}_c^{+} $$
→ J/ψ D0K+ and
B
c
+
→
B
s
0
π
+
$$ {B}_c^{+}\to {B}_s^0{\pi}^{+} $$
. Combining the results of the individual decay channels, the
B
c
+
$$ {B}_c^{+} $$
mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c2. This is the most precise measurement of the
B
c
+
$$ {B}_c^{+} $$
mass to date. The difference between the
B
c
+
$$ {B}_c^{+} $$
and
B
s
0
$$ {B}_s^0 $$
meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP07(2020)123
