Theoretical analysis of $\Lambda$(1405) photoproduction - INSPIRE

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Theoretical analysis of $\Lambda$ (1405) photoproduction

Satoshi X. Nakamura
(
- Osaka U.
)
,
Daisuke Jido
(
- Tokyo Metropolitan U.
)

Dec 24, 2013

5 pages

Part of Proceedings, 15th International Conference on Hadron Spectroscopy (Hadron 2013) : Nara, Japan, November 4-8, 2013, 141

Published in:

PoS Hadron2013 (2013) 141

Contribution to:

- Hadron 2013
, 141

Published: 2014

e-Print:

1312.6768 [nucl-th]

DOI:

10.22323/1.205.0141

View in:

ADS Abstract Service

reference search3 citations

Citations per year

Abstract: (arXiv)

We develop a model that describes the gamma p -> K^+ pi Sigma reaction in the Lambda(1405) region. The model consists of gauge invariant photo-production mechanisms, and the chiral unitary model that gives the rescattering amplitudes where Lambda(1405) is contained. The model also contains phenomenological parameters, associated with short-range dynamics, to be used in fitting data. We successfully fit recent CLAS data for the pi-Sigma invariant mass distributions (line-shape) in the gamma p -> K^+ pi Sigma reaction for all the charge states. We find that the higher mass pole for Lambda(1405) of the chiral unitary model plays an important role in the reaction. We also find the non-resonant background contribution is not negligible, and its sizable effect shifts the Lambda(1405) peak position by several MeV. This work sets a starting point for a fuller analysis in which line-shape as well as K^+ angular distribution data are simultaneously analyzed for extracting Lambda(1405) pole(s).

Note:

5 pages, 6 figures, Contribution to the proceedings of XV International Conference on Hadron Spectroscopy (Hadron 2013), November 4-8 2013, Nara, Japan

Lambda(1405): photoproduction
invariance: gauge
mass: pole
unitarity
chiral
angular distribution
mass spectrum
short-range
background
CLAS

References(9)

Figures(6)

[1]

Measurement of the Σπ photoproduction line shapes near the Λ(1405)

CLAS

Collaboration

•

K. Moriya
(
- Carnegie Mellon U.
)

et al.

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•
e-Print:
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•
DOI:
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[2]

Differential Photoproduction Cross Sections of the $\Sigma^0(1385)$ , $\Lambda(1405)$ , and $\Lambda(1520)$

CLAS

Collaboration

•

K. Moriya
(
- Carnegie Mellon U.
)

et al.

- Phys.Rev.C 88 (2013) 045201,
- Phys.Rev.C 88 (2013) 4, 049902 (addendum)
•
e-Print:
- 1305.6776
•
DOI:
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[3]

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•
e-Print:
- 1104.4474
•
DOI:
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[4]

Chiral dynamics of the two Lambda(1405) states

D. Jido
(
)
,
J.A. Oller
(
- Murcia U.
)
,
E. Oset
(
- Valencia U. and
- Valencia U., IFIC
)
,
A. Ramos
(
- Barcelona U., ECM
)
,
U.G. Meissner
(
- Bonn U., HISKP
)

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•
e-Print:
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•
DOI:
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[5]

Effective anti-K N interaction based on chiral SU(3) dynamics

Tetsuo Hyodo
(
- Munich, Tech. U. and
- Kyoto U., Yukawa Inst., Kyoto
)
,
Wolfram Weise
(
- Munich, Tech. U.
)

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•
e-Print:
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•
DOI:
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[6]

Prog. Theor. Exp. Phys. (to be published)

S.X. Nakamura
,
D. Jido

[6]

Lambda (1405) photoproduction based on chiral unitary model

S.X. Nakamura
(
- Kyoto U., Yukawa Inst., Kyoto and
- Osaka U.
)
,
D. Jido
(
- Tokyo Metropolitan U.
)

- PTEP 2014 (2014) 023D01
•
e-Print:
- 1310.5768
•
DOI:
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[7]

Low lying S = -1 excited baryons and chiral symmetry

E. Oset
(
- Valencia U. and
- Valencia U., IFIC
)
,
A. Ramos
(
- Barcelona U., ECM
)
,
C. Bennhold
(
- George Washington U.
)

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•
e-Print:
- nucl-th/0109006
•
DOI:
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[8]

Chiral dynamics of p wave in K- p and coupled states

D. Jido
(
- Barcelona U., ECM
)
,
E. Oset
(
- Valencia U. and
- Valencia U., IFIC
)
,
A. Ramos
(
- Barcelona U., ECM
)

- Phys.Rev.C 66 (2002) 055203
•
e-Print:
- nucl-th/0208010
•
DOI:
- 10.1103/PhysRevC.66.055203