Photoproduction of <math><mrow><mi>γ</mi><mi>p</mi><mo>→</mo><msub><mi>f</mi><mn>0</mn></msub><mrow><mo>(</mo><mn>980</mn><mo>)</mo></mrow><mi>p</mi></mrow></math> in an effective Lagrangian approach

Wei, Neng-Chang; Wang, Ai-Chao; Huang, Fei

doi:10.1103/PhysRevC.110.025207

Photoproduction of $γ p \to f_{0} (980) p$ in an effective Lagrangian approach

Neng-Chang Wei
(
- Henan Normal U. and
- Beijing, GUCAS
)
,
Ai-Chao Wang
(
- China U. Petrol., Qingdao
)
,
Fei Huang
(
- Beijing, GUCAS
)

Aug 21, 2024

8 pages

Published in:

Phys.Rev.C 110 (2024) 2, 025207

Published: Aug 27, 2024

e-Print:

2408.11352 [hep-ph]

DOI:

10.1103/PhysRevC.110.025207 (publication)

View in:

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Abstract: (APS)

The most recent data on differential cross sections and photon beam asymmetries

Σ

from the LEPS2/BGOegg Collaboration for the

γ p \to f_{0} (980) p

reaction are analyzed within a tree-level effective Lagrangian approach. The

t

-channel

ρ

and

ω

exchanges, the

u

- and

s

-channel

N

exchanges, the interaction current, and the possible

s

-channel

N^{*}

exchanges are taken into account in constructing the reaction amplitudes to reproduce the data. The results show that the contributions from either the

N (2040) 3 / 2^{+}

or the

N (2100) 1 / 2^{+}

resonance exchange in the

s

channel are necessarily required to describe the LEPS2/BGOegg data and they dominate the differential cross sections of

γ p \to f_{0} (980) p

. Further analysis shows that the contributions from the

t

-channel

ρ

and

ω

exchanges and the interaction current are rather small to both differential cross sections and photo beam asymmetries, and the contributions from

u

-channel

N

exchange are considerable in the case of including

N (2040) 3 / 2^{+}

in the model while negligible in the case of including

N (2100) 1 / 2^{+}

in the model. Predictions of target asymmetries

T

for

γ p \to f_{0} (980) p

are given, which can be examined by future experiments.

Note:

8 pages,8 figures, to be published in Physical Review C

References(39)

Figures(11)

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Photoproduction of γp→f0(980)p in an effective Lagrangian approach

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Photoproduction of $γ p \to f_{0} (980) p$ in an effective Lagrangian approach