Analysis of the $\gamma n \rightarrow K^+ \Sigma^-$ (1385) photoproduction

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

doi:10.1103/PhysRevD.105.034017

Analysis of the $\gamma n \rightarrow K^+ \Sigma^-$ (1385) photoproduction

Jan 26, 2022

7 pages

Published in:

Phys.Rev.D 105 (2022) 3, 034017

Published: Feb 1, 2022

e-Print:

2201.10778 [hep-ph]

DOI:

10.1103/PhysRevD.105.034017 (publication)

View in:

ADS Abstract Service

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Abstract: (APS)

In our previous work [Phys. Rev. D 101, 074025 (2020)], the photoproduction

γ p \to K^{+} Σ^{0} (1385)

has been investigated within an effective Lagrangian approach. There, the reaction amplitudes were constructed by considering the

t

-channel

K

and

K^{*} (892)

exchanges,

s

-channel

N

contribution,

u

-channel

Λ

exchange, generalized contact term, and a minimum number of

s

-channel

N

and

Δ

resonance diagrams. It was found that the inclusion of one of the

N (1895) {1 / 2}^{-}

,

Δ (1900) {1 / 2}^{-}

, and

Δ (1930) {5 / 2}^{-}

resonances is essential to reproduce the available differential and total cross-section data for

γ p \to K^{+} Σ^{0} (1385)

. In the present work, we employ the same model to study the photoproduction

γ n \to K^{+} Σ^{-} (1385)

, with the purpose being to understand the reaction mechanism and, in particular, to figure out which one of the

N (1895) {1 / 2}^{-}

,

Δ (1900) {1 / 2}^{-}

, and

Δ (1930) {5 / 2}^{-}

resonances is really capable for a simultaneous description of the data for both

K^{+} Σ^{0} (1385)

and

K^{+} Σ^{-} (1385)

photoproduction reactions. The results show that the available data on differential and total cross sections and photobeam asymmetries for

γ n \to K^{+} Σ^{-} (1385)

can be reproduced only with the inclusion of the

Δ (1930) {5 / 2}^{-}

resonance rather than the other two. The generalized contact term and the

t

-channel

K

exchange are found to dominate the background contributions. The resonance

Δ (1930) {5 / 2}^{-}

provides the most important contributions in the whole energy region considered, and it is responsible for the bump structure exhibited in the total cross sections.

Note:

7 pages, 7 figures. Accepted for publication in PRD

Delta(1930)
photoproduction
total cross section
Delta(1900)
asymmetry
background
effective Lagrangian
structure

References(21)

Figures(10)

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Analysis of the γn→K+Σ−\gamma n \rightarrow K^+ \Sigma^-γn→K+Σ− (1385) photoproduction

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Analysis of the $\gamma n \rightarrow K^+ \Sigma^-$ (1385) photoproduction