Measurement of the <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 mathvariant="normal">Λ</mi><msup><mrow><mover accent="true"><mrow><mi mathvariant="normal">Σ</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mn>0</mn></mrow></msup><mo>+</mo><mi>c</mi><mo>.</mo><mi>c</mi><mo>.</mo></mrow></math> cross sections at <math display="inline"><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt></mrow></math> from 2.3094 to 3.0800 GeV - INSPIRE

DataBETA

Measurement of the $e^{+} e^{-} \to Λ {\bar{Σ}}^{0} + c . c .$ cross sections at $\sqrt{s}$ from 2.3094 to 3.0800 GeV

BESIII

Collaboration

Aug 7, 2023

11 pages

Published in:

Phys.Rev.D 109 (2024) 1, 012002

Published: Jan 1, 2024

e-Print:

2308.03361 [hep-ex]

DOI:

10.1103/PhysRevD.109.012002 (publication)

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

reference search4 citations

Citations per year

Abstract: (APS)

The Born cross sections and effective form factors of the process

e^{+} e^{-} \to Λ {\bar{Σ}}^{0} + c . c .

are measured at 14 center-of-mass energy points from 2.3094 to 3.0800 GeV, based on data corresponding to an integrated luminosity of

(478.5 \pm 4.8) {pb}^{- 1}

collected with the BESIII detector. A nonzero Born cross section is observed at the center-of-mass energy of 2.3094 GeV with a statistical significance of more than five standard deviations, and the cross sections at other energies are obtained with improved precision compared to earlier measurements from the BABAR Collaboration. The Born cross-section line shape is described better by a shape considering the strong-interaction effects than by a pQCD motivated functional form.

electron positron: annihilation
electron positron: colliding beams
Lambda: electroproduction
Sigma0: electroproduction
Lambda: associated production
Sigma0: associated production
quantum chromodynamics: perturbation theory
BES
Beijing Stor
Born approximation

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Figures(4)

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