Search for the light hadron decay <math display="inline"><mrow><msub><mrow><mi>χ</mi></mrow><mrow><mi>c</mi><mn>1</mn></mrow></msub><mo stretchy="false">(</mo><mn>3872</mn><mo stretchy="false">)</mo><mo stretchy="false">→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>-</mo></mrow></msup><mi>η</mi></mrow></math>

Ablikim, M.; Achasov, M.N.; Adlarson, P.; Ai, X.C.; Aliberti, R.; Amoroso, A.; An, M.R.; An, Q.; Bai, Y.; Bakina, O.

doi:10.1103/PhysRevD.109.L011102

Search for the light hadron decay $χ_{c 1} (3872) \to π^{+} π^{-} η$

BESIII

Collaboration

Aug 26, 2023

11 pages

Published in:

Phys.Rev.D 109 (2024) 1, L011102

Published: Jan 1, 2024

e-Print:

2308.13980 [hep-ex]

DOI:

10.1103/PhysRevD.109.L011102 (publication)

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

pdf

reference search4 citations

Citations per year

Abstract: (APS)

With a data sample corresponding to an integrated luminosity of

11.5 {fb}^{- 1}

collected with the BESIII detector operating at the BEPCII storage ring, for the first time the light hadron decay

χ_{c 1} (3872) \to π^{+} π^{-} η

is searched for. While no significant signal is observed, the upper limits at the 90% confidence level for

σ [e^{+} e^{-} \to γ χ_{c 1} (3872)] B [χ_{c 1} (3872) \to π^{+} π^{-} η]

at center of mass energies from 4.13 GeV to 4.34 GeV are determined. By normalizing to the

χ_{c 1} (3872) \to π^{+} π^{-} J / ψ

decay channel, a 90% confidence level upper limit for the branching fraction ratio

R = B [χ_{c 1} (3872) \to π^{+} π^{-} η] / B [χ_{c 1} (3872) \to π^{+} π^{-} J / ψ] < 0.12

is given. These measurements provide important inputs for understanding the internal structure of the

χ_{c 1} (3872)

resonance.

Note:

11 pages, 5 figures, version to appear in PRD(L)

electron positron: annihilation
electron positron: colliding beams
X(3872): hadronic decay
eta
pi: pair production
X(3872): branching ratio
branching ratio: ratio: measured
BES
Beijing Stor
structure

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Search for the light hadron decay χc1(3872)→π+π-η

Citations per year

Search for the light hadron decay $χ_{c 1} (3872) \to π^{+} π^{-} η$