Observation of the $ {B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0 $ decay

Aaij, Roel; Abdelmotteleb, Ahmed Sameh Wagih; Abellan Beteta, Carlos; Abudinén, Fernando Jesus; Ackernley, Thomas; Adams, J.A.; Adams, James Michael; Adefisoye, A.A.; Adefisoye, Ayomide Matthew; Adeva, Bernardo

doi:10.1007/JHEP04(2024)151

Observation of the ${B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0$ decay

LHCb

Collaboration

Feb 8, 2024

30 pages

Published in:

JHEP 04 (2024) 151

Published: Apr 30, 2024

e-Print:

2402.05523 [hep-ex]

DOI:

10.1007/JHEP04(2024)151

Report number:

LHCb-PAPER-2023-046,
CERN-EP-2024-019

Experiments:

CERN-LHC-LHCb

View in:

reference search10 citations

Citations per year

Abstract: (Springer)

The first observation of the

{B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0

decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 9 fb

^{−1}

, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV. The ratio of its branching fraction relative to the

{B}_c^{+}\to J/\psi {\pi}^{+}

channel is measured to be

\frac{{\mathcal{B}}_{B_c^{+}\to J/\psi {\pi}^{+}{\pi}^0}}{{\mathcal{B}}_{B_c^{+}\to J/\psi {\pi}^{+}}}=2.80\pm 0.15\pm 0.11\pm 0.16,

where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B

^{+}

→ J/ψK

^{*+}

and

{B}_c^{+}\to J/\psi {\pi}^{+}

decays, which are used to determine the π

^{0}

detection efficiency. The π

^{+}

π

^{0}

mass spectrum is found to be consistent with the dominance of an intermediate ρ

^{+}

contribution in accordance with a model based on QCD factorisation.[graphic not available: see fulltext]

Note:

30 pages, 6 figures. All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-046.html (LHCb public pages)

B Physics
Hadron-Hadron Scattering
QCD
Spectroscopy
p p: scattering
p p: colliding beams
B/c+: hadronic decay
J/psi(3100)
pi0: particle identification
pi+

References(133)

Figures(6)

Observation of the $B_c$ meson in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 81 (1998) 2432-2437
•
e-Print:
- hep-ex/9805034
•
DOI:
- 10.1103/PhysRevLett.81.2432

Observation of $B_c$ mesons in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 58 (1998) 112004
•
e-Print:
- hep-ex/9804014
•
DOI:
- 10.1103/PhysRevD.58.112004

Measurement of $\sigma(pp \to b \bar{b} X)$ at $\sqrt{s}=7~\rm{TeV}$ in the forward region

LHCb

Collaboration

•

R. Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 694 (2010) 209-216
•
e-Print:
- 1009.2731
•
DOI:
- 10.1016/j.physletb.2010.10.010

Measurement of $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7~\rm{TeV}$

LHCb

Collaboration

•

R. Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Eur.Phys.J.C 71 (2011) 1645
•
e-Print:
- 1103.0423
•
DOI:
- 10.1140/epjc/s10052-011-1645-y

Measurement of the $B^\pm$ production cross-section in $pp$ collisions at $\sqrt{s}=7$ TeV

LHCb

Collaboration

•

R. Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 04 (2012) 093
•
e-Print:
- 1202.4812
•
DOI:
- 10.1007/JHEP04(2012)093

Measurement of B meson production cross-sections in proton-proton collisions at $\sqrt{s}$ = 7 TeV

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 08 (2013) 117
•
e-Print:
- 1306.3663
•
DOI:
- 10.1007/JHEP08(2013)117

Production of J/psi and Upsilon mesons in pp collisions at sqrt(s) = 8 TeV

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 06 (2013) 064
•
e-Print:
- 1304.6977
•
DOI:
- 10.1007/JHEP06(2013)064

Measurement of forward $J/\psi$ production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- JHEP 10 (2015) 172,
- JHEP 05 (2017) 063 (erratum)
•
e-Print:
- 1509.00771
•
DOI:
- 10.1007/JHEP10(2015)172

First observation of the decay $B_c^+ \to J/\psi \pi^+\pi^-\pi^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 108 (2012) 251802
•
e-Print:
- 1204.0079
•
DOI:
- 10.1103/PhysRevLett.108.251802

Observation of the decay $B_c^+ \to \psi(2S)\pi^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.D 87 (2013) 071103
•
e-Print:
- 1303.1737
•
DOI:
- 10.1103/PhysRevD.87.071103

First observation of the decay $B_{c}^{+}\to J/\psi K^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 09 (2013) 075
•
e-Print:
- 1306.6723
•
DOI:
- 10.1007/JHEP09(2013)075

Observation of the decay $B_c \rightarrow J/\psi K^+ K^- \pi^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 11 (2013) 094
•
e-Print:
- 1309.0587
•
DOI:
- 10.1007/JHEP11(2013)094

Evidence for the decay $B_c^+ \rightarrow J/\psi 3\pi^+ 2\pi^-$

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 05 (2014) 148
•
e-Print:
- 1404.0287
•
DOI:
- 10.1007/JHEP05(2014)148

Study of ${\mathrm{B}}_{\mathrm{c}}^{+}$ decays to charmonia and three light hadrons

LHCb

Collaboration

•

Roel Aaij
(
- Nikhef, Amsterdam
)

et al.

- JHEP 01 (2022) 065
•
e-Print:
- 2111.03001
•
DOI:
- 10.1007/JHEP01(2022)065

Study of ${B}_c^{+}$ meson decays to charmonia plus multihadron final states

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- JHEP 07 (2023) 198
•
e-Print:
- 2208.08660
•
DOI:
- 10.1007/JHEP07(2023)198

Measurement of the branching fraction ratio $\mathcal{B}(B_c^+ \rightarrow \psi(2S)\pi^+)/\mathcal{B}(B_c^+ \rightarrow J/\psi \pi^+)$

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- Phys.Rev.D 92 (2015) 7, 072007
•
e-Print:
- 1507.03516
•
DOI:
- 10.1103/PhysRevD.92.072007

Measurement of the ratio of branching fractions $\mathcal{B}(B_{c}^{+} \to J/\psi K^{+})/\mathcal{B}(B_{c}^{+} \to J/\psi\pi^{+})$

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- JHEP 09 (2016) 153
•
e-Print:
- 1607.06823
•
DOI:
- 10.1007/JHEP09(2016)153

Observation of $B^+_c \rightarrow J/\psi D_s^+$ and $B^+_c \rightarrow J/\psi D_s^{*+}$ decays

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.D 87 (2013) 11, 112012,
- Phys.Rev.D 89 (2014) 1, 019901 (addendum)
•
e-Print:
- 1304.4530
•
DOI:
- 10.1103/PhysRevD.87.112012

Observation of the Decay $B^+_c → B^0_sπ^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 111 (2013) 18, 181801
•
e-Print:
- 1308.4544
•
DOI:
- 10.1103/PhysRevLett.111.181801

Measurement of the $B_c^+$ meson lifetime using $B_c^+ \to J\!/\!\psi \mu^+ \nu_{\mu} X$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Eur.Phys.J.C 74 (2014) 5, 2839
•
e-Print:
- 1401.6932
•
DOI:
- 10.1140/epjc/s10052-014-2839-x

First observation of a baryonic $B_c^+$ decay

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 113 (2014) 15, 152003
•
e-Print:
- 1408.0971
•
DOI:
- 10.1103/PhysRevLett.113.152003

Measurement of $B_c^+$ production in proton-proton collisions at $\sqrt{s}=8$ TeV

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 114 (2015) 132001
•
e-Print:
- 1411.2943
•
DOI:
- 10.1103/PhysRevLett.114.132001

Measurement of the lifetime of the $B_c^+$ meson using the $B_c^+\rightarrow J/\psi\pi^+$ decay mode

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Lett.B 742 (2015) 29-37
•
e-Print:
- 1411.6899
•
DOI:
- 10.1016/j.physletb.2015.01.010

Measurement of the ratio of the production cross sections times branching fractions of $B_{c}^{\pm} \to J/\psi \pi^{\pm}$ and $B^{\pm} \to J/\psi K^{\pm}$ and $\mathcal{B}(B_{c}^{\pm} \to J/\psi \pi^{\pm}\pi^{\pm}\pi^{\mp})/\mathcal{B}(B_{c}^{\pm} \to J/\psi \pi^{\pm})$ in pp collisions at $\sqrt{s} =$ 7 TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 01 (2015) 063
•
e-Print:
- 1410.5729
•
DOI:
- 10.1007/JHEP01(2015)063

Study of the $B_c^+ \rightarrow J/\psi D_s^+$ and $B_c^+ \rightarrow J/\psi D_s^{*+}$ decays with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 76 (2016) 1, 4
•
e-Print:
- 1507.07099
•
DOI:
- 10.1140/epjc/s10052-015-3743-8

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Observation of the Bc+→J/ψπ+π0 {B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0 Bc+​→J/ψπ+π0 decay

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Observation of the ${B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0$ decay