Observation of excess lambda (anti-lambda) production in two photon processes at TRISTAN

samples were obtained under such conditions as no-electron, anti-electron, and remnant-jet tags. The data were compared with theoretical calculations. The measured cross sections are two-times larger than the leading-order theoretical predictions, suggesting the necessity of next-to-leading-order Monte-Carlo generator.

Note:

10 pages, latex format (article), 3 figures, submitted for publication. Report-no: KEK-preprint-94-177

electron positron: colliding beams
colliding beams: electron positron
exchange: two-photon
two-photon: exchange
photon photon: inclusive reaction
Lambda: photoproduction
photoproduction: Lambda
Antilambda: photoproduction
photoproduction: Antilambda
mass spectrum: (p pi)

References(29)

Figures(0)

Measurement of the D*+- cross-section in a two photon process

TOPAZ

Collaboration

•

R. Enomoto
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 50 (1994) 1879-1883,
- In *Tsukuba 1993, Proceedings, Particle physics* 311-315, and Tsukuba KEK - KEK-Prepr.-93-107 (93/08,rec.Nov.) 5 p. Nagoya Univ. - DPNU-93-29 (93/08,rec.Nov.) 5 p. Purdue Univ. West Lafayette - PU-93-675 (93/08,rec.Nov.) 5 p. Tokyo Univ. - INS-1002 (93/08,rec.Nov.) 5 p
•
e-Print:
- hep-ex/9411002
•
DOI:
- 10.1103/PhysRevD.50.1879

Measurement of the D*+- cross-section using a soft pion analysis in two photon processes

TOPAZ

Collaboration

•

R. Enomoto
(
- KEK, Tsukuba
)

et al.

- Phys.Lett.B 328 (1994) 535-546
•
e-Print:
- hep-ex/9412001
•
DOI:
- 10.1016/0370-2693(94)91515-6

Measurement of open charm production in two photon processes with detection of electron inclusive events

VENUS

Collaboration

•

S. Uehara
(
- KEK, Tsukuba
)

et al.

- Z.Phys.C 63 (1994) 213-218
•
DOI:
- 10.1007/BF01411012

Two Photon Mechanism of Particle Production by High-Energy Colliding Beams

Stanley J. Brodsky
(
- SLAC
)
,
Toichiro Kinoshita
(
- Cornell U., LNS
)
,
Hidezumi Terazawa
(
- Cornell U., LNS
)

- Phys.Rev.D 4 (1971) 1532-1557
•
DOI:
- 10.1103/PhysRevD.4.1532

Production of Large Transverse Momentum Jets in Photon - Photon Collisions

- Phys.Rev.Lett. 41 (1978) 672-676
•
DOI:
- 10.1103/PhysRevLett.41.672

Production of Jets and Single Particles at Large Transverse Momentum in Photon-Photon Collisions

- Phys.Rev.D 19 (1979) 1418-1443
•
DOI:
- 10.1103/PhysRevD.19.1418

Quark Physics in Inelastic Virtual Compton Scattering

Hidezumi Terazawa
(
- INS, Tokyo
)

- J.Phys.Soc.Jap. 47 (1979) 355-360,
- J.Phys.Soc.Jap.47 (1979) 355-360 and Tokyo Univ - INS-330 (79,REC.FEB) 18p
•
DOI:
- 10.1143/JPSJ.47.355

Jet Production in $e^+ e^-$ Collisions to Order $\alpha^3$ and $\alpha^4$ and Including {QCD} Corrections

K. Kajantie
(
- Helsinki U.
)
,
Risto Raitio
(
- Helsinki U.
)

- Nucl.Phys.B 159 (1979) 528-546
•
DOI:
- 10.1016/0550-3213(79)90349-3

Parametrizations of the Photon Structure and Applications to Supersymmetric Particle Production at HERA

Manuel Drees
(
- Dortmund U.
)
,
K. Grassie
(
- Dortmund U.
)

- Z.Phys.C 28 (1985) 451
•
DOI:
- 10.1007/BF01413608

Heavy quark production in two photon collisions

Manuel Drees
(
- Wisconsin U., Madison
)
,
M. Kramer
(
- DESY and
- Mainz U., Inst. Phys.
)
,
J. Zunft
(
- DESY
)
,
P.M. Zerwas
(
- DESY
)

- Phys.Lett.B 306 (1993) 371-378
•
DOI:
- 10.1016/0370-2693(93)90093-W

Parametrization of parton distributions in the photon

- Phys.Lett.B 269 (1991) 458-464
•
DOI:
- 10.1016/0370-2693(91)90201-Z

Characteristics of proton production in jets from $e^+e^-$ annihilation at 29-GeV

TPC/Two Gamma

Collaboration

•

H. Aihara

et al.

- Phys.Rev.Lett. 53 (1984) 130
•
DOI:
- 10.1103/PhysRevLett.53.130

Baryon Production in Jet Fragmentation and $\Upsilon$ Decay

- Phys.Scripta 32 (1985) 574
•
DOI:
- 10.1088/0031-8949/32/6/003

Performance of the TOPAZ forward calorimeter at the TRISTAN experiment

et al.

- Nucl.Instrum.Meth.A 316 (1992) 202-216
•
DOI:
- 10.1016/0168-9002(92)90902-G

The Topaz Inner Drift Chamber

et al.

- Nucl.Instrum.Meth.A 269 (1988) 513
•
DOI:
- 10.1016/0168-9002(88)90127-1

- Jap.J.Appl.Phys. 25 L440

TOPAZ BARREL ELECTROMAGNETIC CALORIMETER

et al.

- Nucl.Instrum.Meth.A 270 (1988) 11
•
DOI:
- 10.1016/0168-9002(88)90004-6

The Gas Sampling Electromagnetic Calorimeter Using Conductive Plastic Tubes

et al.

- Nucl.Instrum.Meth.A 256 (1987) 449
•
DOI:
- 10.1016/0168-9002(87)90288-9

- Nucl.Instrum.Meth.A 271 464

The Topaz Time Projection Chamber

et al.

- Nucl.Instrum.Meth.A 252 (1986) 423-430,
- Wire Chamber Conf.1986:0423
•
DOI:
- 10.1016/0168-9002(86)91217-9

TOPAZ TRIGGER SYSTEM

et al.

- Nucl.Instrum.Meth.A 269 (1988) 507
•
DOI:
- 10.1016/0168-9002(88)90126-X

Design and Performance of Topaz {TPC} Trigger

- IEEE Trans.Nucl.Sci. 35 (1988) 419-423,
- IEEE Trans. Nucl. Sci. 35 (1988) 419-423 and Tsukuba KEK - KEK-Prepr.-87-093 (87,rec.Nov.) 5 p
•
DOI:
- 10.1109/23.12756

Software trigger for Topaz detector at Tristan

- Nucl.Instrum.Meth.A 297 (1990) 148-152
•
DOI:
- 10.1016/0168-9002(90)91360-N

Measurement of the inclusive cross-section of jets in $\gamma \gamma$ interactions at TRISTAN

TOPAZ

Collaboration

•

H. Hayashii
(
- Nara Women's U.
)

et al.

- Phys.Lett.B 314 (1993) 149-158
•
DOI:
- 10.1016/0370-2693(93)91335-K

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics: Jetset Version 6.2

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Comput.Phys.Commun. 39 (1986) 347-407
•
DOI:
- 10.1016/0010-4655(86)90096-2

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