Observation of <math display="inline"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>-</mo></mrow></msup><mo stretchy="false">→</mo><mi>ω</mi><msub><mrow><mi>χ</mi></mrow><mrow><mi>b</mi><mi>J</mi></mrow></msub><mo stretchy="false">(</mo><mn>1</mn><mi>P</mi><mo stretchy="false">)</mo></mrow></math> and Search for <math display="inline"><mrow><msub><mrow><mi>X</mi></mrow><mrow><mi>b</mi></mrow></msub><mo stretchy="false">→</mo><mi>ω</mi><mi mathvariant="normal">ϒ</mi><mo stretchy="false">(</mo><mn>1</mn><mi>S</mi><mo stretchy="false">)</mo></mrow></math> at <math display="inline"><msqrt><mi>s</mi></msqrt></math> near 10.75 GeV

Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D.M.; Aushev, T.; Aushev, V.

doi:10.1103/PhysRevLett.130.091902

Observation of $e^{+} e^{-} \to ω χ_{b J} (1 P)$ and Search for $X_{b} \to ω ϒ (1 S)$ at $\sqrt{s}$ near 10.75 GeV

Belle-II

Collaboration

Aug 28, 2022

7 pages

Published in:

Phys.Rev.Lett. 130 (2023) 9, 091902

Published: Mar 3, 2023

e-Print:

2208.13189 [hep-ex]

DOI:

10.1103/PhysRevLett.130.091902 (publication)

PDG:

{{\mathit \Upsilon}{(10753)}}

\rightarrow

{{\mathit e}^{+}}{{\mathit e}^{-}}

Report number:

Belle II Preprint 2022-004; KEK Preprint 2022-24

Experiments:

KEK-BF-BELLE-II

View in:

ADS Abstract Service

pdf

reference search29 citations

Citations per year

Abstract: (APS)

We study the processes

e^{+} e^{-} \to ω χ_{b J} (1 P)

(

J = 0

, 1, or 2) using samples at center-of-mass energies

\sqrt{s} = 10.701

, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and

4.7 {fb}^{- 1}

of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the

ϒ (4 S)

resonance. We report the first observation of

ω χ_{b J} (1 P)

signals at

\sqrt{s} = 10.745 GeV

. By combining Belle II data with Belle results at

\sqrt{s} = 10.867 GeV

, we find energy dependencies of the Born cross sections for

e^{+} e^{-} \to ω χ_{b 1, b 2} (1 P)

to be consistent with the shape of the

ϒ (10753)

state. These data indicate that the internal structures of the

ϒ (10753)

and

ϒ (10860)

states may differ. Including data at

\sqrt{s} = 10.653 GeV

, we also search for the bottomonium equivalent of the

X (3872)

state decaying into

ω ϒ (1 S)

. No significant signal is observed for masses between 10.45 and

10.65 GeV / c^{2}

.

Note:

7 pages, 3 figures, accepted by PRL

electron positron: annihilation
electron positron: colliding beams
BELLE
Upsilon(9460): electroproduction
X(3872)
omega(783)
KEK-B
bottomonium: electroproduction
Upsilon(10570): electroproduction
mass spectrum: (Upsilon(9460) omega(783))

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Observation of e+e-→ωχbJ(1P) and Search for Xb→ωϒ(1S) at s near 10.75 GeV

Citations per year

Observation of $e^{+} e^{-} \to ω χ_{b J} (1 P)$ and Search for $X_{b} \to ω ϒ (1 S)$ at $\sqrt{s}$ near 10.75 GeV