Separated structure functions for the exclusive electroproduction of K+ Lambda and K+ Sigma0 final states - INSPIRE

DataBETA

Separated structure functions for the exclusive electroproduction of K+ Lambda and K+ Sigma0 final states

CLAS

Collaboration

•

P. Ambrozewicz
(
- Florida Intl. U.
)

Nov, 2006

61 pages

Published in:

Phys.Rev.C 75 (2007) 045203

e-Print:

hep-ex/0611036 [hep-ex]

DOI:

10.1103/PhysRevC.75.045203

Report number:

JLAB-PHY-06-576

Experiments:

JLAB-CLAS

View in:

pdflinksdatasets

reference search82 citations

Citations per year

Abstract:

We report measurements of the exclusive electroproduction of

K^+\Lambda

and

K^+\Sigma^0

final states from a proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions

\sigma_T

,

\sigma_L

,

\sigma_{TT}

, and

\sigma_{LT}

were extracted from the

\Phi

- and

\epsilon

-dependent differential cross sections taken with electron beam energies of 2.567, 4.056, and 4.247 GeV. This analysis represents the first

\sigma_L/\sigma_T

separation with the CLAS detector, and the first measurement of the kaon electroproduction structure functions away from parallel kinematics. The data span a broad range of momentum transfers from

0.5\leq Q^2\leq 2.8

GeV

^2

and invariant energy from

1.6\leq W\leq 2.4

GeV, while spanning nearly the full center-of-mass angular range of the kaon. The separated structure functions reveal clear differences between the production dynamics for the

\Lambda

and

\Sigma^0

hyperons. These results provide an unprecedented data sample with which to constrain current and future models for the associated production of strangeness, which will allow for a better understanding of the underlying resonant and non-resonant contributions to hyperon production.

13.85.Fb
14.20.Jn
13.60.Rj
13.40.-f
CLAS
kaon electroproduction
structure functions
hyperons
electron p: exclusive reaction
K+: electroproduction

References(48)

Figures(0)

Baryon Decays in a Quark Model with Chromodynamics

Roman Koniuk
(
- Toronto U.
)
,
Nathan Isgur
(
- Toronto U.
)

- Phys.Rev.D 21 (1980) 1868,
- Phys.Rev.D 23 (1981) 818 (erratum)
•
DOI:
- 10.1103/PhysRevD.21.1868

Strange decays of nonstrange baryons

Simon Capstick
(
- Florida State U., SCRI
)
,
W. Roberts
(
- Old Dominion U. and
- Jefferson Lab
)

- Phys.Rev.D 58 (1998) 074011
•
e-Print:
- nucl-th/9804070
•
DOI:
- 10.1103/PhysRevD.58.074011

- Phys.Rev.D 58 1

Baryon resonances and strong QCD

E. Klempt
(
- Bonn U., ITKP
)

e-Print:
- nucl-ex/0203002
•
DOI:
- 10.1142/9789812704887_0017

Photoproduction and electroproduction of eta mesons

- Z.Phys.A 352 (1995) 327-343,
- Z. Phys. A352 (1995) 327-343, and Mainz U. - MKPH-T-95-02 (95,rec.Jul.) 37 p
•
e-Print:
- nucl-th/9506029
•
DOI:
- 10.1007/BF01289506

Coincidence measurements of single k+ electroproduction

et al.

- Phys.Rev.Lett. 28 (1972) 1086-1089
•
DOI:
- 10.1103/PhysRevLett.28.1086

Electroproduction of $K^+$ mesons in the forward direction. (talk)

et al.

- Phys.Rev.Lett. 32 (1974) 21-24
•
DOI:
- 10.1103/PhysRevLett.32.21

Production of hyperons by virtual photons

et al.

- Nucl.Phys.B 95 (1975) 77-97
•
DOI:
- 10.1016/0550-3213(75)90481-2

Electroproduction of $K^+$ mesons along the virtual photon direction

et al.

- Phys.Rev.D 15 (1977) 594
•
DOI:
- 10.1103/PhysRevD.15.594

Scalar-Transverse Separation of Electroproduced K+ Lambda and K+ Sigma0 Final States

C.J. Bebek
(
- Cornell U., LNS and
- Harvard U.
)
,
A. Browman
(
- Cornell U., LNS and
- Harvard U.
)
,
C.N. Brown
(
- Cornell U., LNS and
- Harvard U.
)
,
K.M. Hanson
(
- Cornell U., LNS and
- Harvard U.
)
,
R.V. Kline
(
- Cornell U., LNS and
- Harvard U.
)

et al.

- Phys.Rev.D 15 (1977) 3082
•
DOI:
- 10.1103/PhysRevD.15.3082

Electroproduction final states as omega ---> 1

F.E. Close
(
- CERN
)

- Nucl.Phys.B 73 (1974) 410-416
•
DOI:
- 10.1016/0550-3213(74)90339-3

On the Ratio Sigma0/Lambda in Electroproduction Off Protons

Otto Nachtmann
(
- Vienna U.
)

- Nucl.Phys.B 74 (1974) 422-428
•
DOI:
- 10.1016/0550-3213(74)90207-7

On the omega Dependence of Exclusive Hadronic Final States in Lepton-Hadron Scattering

J. Cleymans
(
- CERN
)
,
F.E. Close
(
- CERN
)

- Nucl.Phys.B 85 (1975) 429-441
•
DOI:
- 10.1016/0550-3213(75)90018-8

Electroproduction of $\pi^+ n$ , $\pi^- p$ and $K^+ \Lambda$ , $K^+ \Sigma^0$ Final States Above the Resonance Region

P. Brauel
(
- DESY and
- Hamburg U.
)
,
T. Canzler
(
- DESY and
- Hamburg U.
)
,
D. Cords
(
- DESY and
- Hamburg U.
)
,
R. Felst
(
- DESY and
- Hamburg U.
)
,
Guenter Grindhammer
(
- DESY and
- Hamburg U.
)

et al.

- Z.Phys.C 3 (1979) 101
•
DOI:
- 10.1007/BF01443698

Separation of the longitudinal and transverse cross-sections in the p(e, e-prime K+) Lambda and p(e, e-prime K+) Sigma0 reactions

E93018

Collaboration

•

R.M. Mohring
(
- Maryland U.
)

et al.

- Phys.Rev.C 67 (2003) 055205
•
e-Print:
- nucl-ex/0211005
•
DOI:
- 10.1103/PhysRevC.67.055205

Longitudinal and transverse cross-sections in the H-1(e,e' K+)Lambda reaction

G. Niculescu
(
- Hampton U.
)
,
R.M. Mohring
(
- Maryland U.
)
,
P. Gueye
(
- Hampton U.
)
,
D. Abbott
(
- Jefferson Lab
)
,
A. Ahmidouch
(
- Hampton U. and
- Kent State U.
)

et al.

- Phys.Rev.Lett. 81 (1998) 1805-1808
•
DOI:
- 10.1103/PhysRevLett.81.1805

First measurement of transferred polarization in the exclusive polarized-e p ---> e-prime K+ polarized-Lambda reaction

CLAS

Collaboration

•

D.S. Carman
(
- Ohio U.
)

et al.

- Phys.Rev.Lett. 90 (2003) 131804
•
e-Print:
- hep-ex/0212014
•
DOI:
- 10.1103/PhysRevLett.90.131804

Ratio of sigma(L) / sigma(T) for p(e,e-prime K+) Lambda extracted from polarization transfer

Brian A. Raue
(
- Florida Intl. U.
)
,
Daniel S. Carman
(
- Ohio U. and
- Jefferson Lab
)

- Phys.Rev.C 71 (2005) 065209
•
e-Print:
- nucl-ex/0402024
•
DOI:
- 10.1103/PhysRevC.71.065209

Measurement of gamma p --> K+ Lambda and gamma p --> K+ Sigma0 at photon energies up to 2-GeV

SAPHIR

Collaboration

•

M.Q. Tran
(
- Bonn U.
)

et al.

- Phys.Lett.B 445 (1998) 20-26
•
DOI:
- 10.1016/S0370-2693(98)01393-8

Measurement of gamma p ---> K+ Lambda and gamma p ---> K+ Sigma0 at photon energies up to 2.6-GeV

K.H. Glander
(
- Bonn U. and
- Bonn U., HISKP
)
,
J. Barth
(
- Bonn U. and
- Bonn U., HISKP
)
,
W. Braun
(
- Bonn U. and
- Bonn U., HISKP
)
,
J. Hannappel
(
- Bonn U. and
- Bonn U., HISKP
)
,
N. Jopen
(
- Bonn U. and
- Bonn U., HISKP
)

et al.

- Eur.Phys.J.A 19 (2004) 251-273
•
e-Print:
- nucl-ex/0308025
•
DOI:
- 10.1140/epja/i2003-10119-x

Hyperon photoproduction in the nucleon resonance region

CLAS

Collaboration

•

J.W.C. McNabb
(
- Carnegie Mellon U. and
- Penn State U.
)

et al.

- Phys.Rev.C 69 (2004) 042201
•
e-Print:
- nucl-ex/0305028
•
DOI:
- 10.1103/PhysRevC.69.042201

Differential cross sections for gamma + p ---> K+ + Y for Lambda and Sigma0 hyperons

CLAS

Collaboration

•

R. Bradford
(
- Carnegie Mellon U.
)

et al.

- Phys.Rev.C 73 (2006) 035202
•
e-Print:
- nucl-ex/0509033
•
DOI:
- 10.1103/PhysRevC.73.035202

The Polarized-gamma p ---> K+ Lambda and polarized-gamma p ---> K+ Sigma0 reactions at forward angles with photon energies from 1.5-GeV to 2.4-GeV

LEPS

Collaboration

•

M. Sumihama
(
- Osaka U., Res. Ctr. Nucl. Phys.
)

et al.

- Phys.Rev.C 73 (2006) 035214
•
e-Print:
- hep-ex/0512053
•
DOI:
- 10.1103/PhysRevC.73.035214

Beam polarization asymmetries for the p(gamma, K+) Lambda and p(gamma, K+) Sigma0 reactions at E(gamma) = 1.5 Gev - 2.4 GeV

LEPS

Collaboration

•

R.G.T. Zegers
(
- Osaka U., Res. Ctr. Nucl. Phys.
)

et al.

- Phys.Rev.Lett. 91 (2003) 092001
•
e-Print:
- nucl-ex/0302005
•
DOI:
- 10.1103/PhysRevLett.91.092001

Differential cross section and photon beam asymmetry for the polarized-gamma n ---> K+ Sigma- reaction at E(gamma) = 1.5GeV-2.4GeV

H. Kohri
(
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
D.S. Ahn
,
J.K. Ahn
,
H. Akimune
,
Y. Asano

et al.

- Phys.Rev.Lett. 97 (2006) 082003
•
e-Print:
- hep-ex/0602015
•
DOI:
- 10.1103/PhysRevLett.97.082003

1-25 of 48
1
2
25 / page