Observation of charmed mesons in photon-photon collisions

Bartel, W.; Becker, L.; Felst, R.; Haidt, D.; Knies, G.; Krehbiel, H.; Laurikainen, P.; Magnussen, N.; Meinke, R.; Naroska, B.; Olsson, J. E.; Schmidt, D.; Steffen, P.; Greenshaw, T.; Hagemann, J.; Heinzelmann, G.; Kado, H.; Kuhlen, M.; Petersen, A.; Ramcke, R.; Schneekloth, U.; Weber, G.; Ambrus, K.; Bethke, S.; Dieckmann, A.; Elsen, E.; Heintze, J.; Hellenbrand, K. H.; Komamiya, S.; Krogh, J. von; Rieseberg, H.; Schmitt, H. von der; Smolík, L.; Spitzer, Lyman; Wagner, A.; Zimmer, M.; Bowdery, C. K.; Finch, A. J.; Foster, F.; Hughes, G.; Nye, J. M.; Walker, I. W.; Allison, J.; Barlow, R. J.; Chrin, J.; Duerdoth, I. P.; Loebinger, F. K.; Macbeth, A. A.; Mills, H. E.; Murphy, P. G.; Stephens, K.; Warming, P.; Glasser, R. G.; Hill, P.; Skard, J. A.; Wagner, S. R.; Zorn, G. T.; Cartwright, S. L.; Clarke, D.; Marshall, R.; Middleton, R. P.; Kawagoe, K.; Mäshimo, T.; Takeshita, T.; Yamada, S.

doi:10.1016/0370-2693(87)90584-3

Cited by 33 publications

(7 citation statements)

References 19 publications

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“…This can be compared to the simple prediction a(e+e ---,e+e-D*+X) = ]a(e+e -~e+e-ce) = 43 pb. The ratio of the data to our QPM prediction does not support JADE's conclusion [ 3] of excess D* + production ~8.…”

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confidence: 42%

“…Exclusive two-photon production of the rio meson has been observed with measured rates ranging from agreement [ 1 ] with the QPM prediction to levels several times above it [2]. Inclusive production of the charmed D *+ meson using the D*+~D°n +, D°-~K-n+n ° decay mode has been reported [ 3 ] at a rate higher than the QPM prediction. In this letter we duction using the D*+-'D°n +, D°-,K-n + decay channel [4] ~1 The data were collected at 29 GeV center-of-mass energy with the TPC/Two-Gamma facility [ 5 ] at the SLAC e+e -storage ring PEP.…”

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confidence: 98%

“…This work was supported in part by the United States Department of Energy (under contracts DOE-W-7405- Eng-82, DE-AT03-89ER40492, DE-AS03-76ER70285, DE-AT03-88ER40384, DE-AT03-87ER40327, DE-AT03-79ER70023, DE-AC03-76SF00098, DE-AC02-85ER40194, and DE-AC03-76SF00515), the National Science Foundation (under grants PHY89-07526 and PHY88-19536), and the Foundation for ~7 We also studied the channel used by JADE [ 3 ], D *+ --,DOn +, D °--, K-n + n -n +. Due to a large combinatoric background, the analysis of the untagged sample could only be performed for energetic D* ÷ mesons ( 2ED.…”

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confidence: 99%

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Inclusive D∗± production in photon-photon collisions

et al. 1990

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confidence: 42%

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confidence: 98%

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confidence: 99%

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Inclusive D∗± production in photon-photon collisions

et al. 1990

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“…The reaction e + e − → e + e − D * ± X has been thoroughly studied experimentally. The existence of the D * ± has been inferred either from direct reconstruction [4,5,6] or from unfolding the distribution of soft pions [7,8] resulting from its decay. In addition, measurements have been made using soft leptons [9,10] and kaons [3] to tag the charm.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, measurements have been made using soft leptons [9,10] and kaons [3] to tag the charm. JADE [4] and TPC/Two-Gamma [5] have performed experimental studies of the reaction e + e − → e + e − D * ± X with one outgoing lepton tagged at low average value Q 2 of the momentum transfer squared of the tagged lepton (below 1 (GeV/c) 2 ). TOPAZ [7] has performed a study as well at somewhat larger Q 2 .…”

Section: Introductionmentioning

confidence: 99%

Heavy-quark production in eγ scattering

Laenen

Riemersma²

1996

Physics Letters B

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Open heavy flavour production at e + e − colliders in deeply inelastic eγ scattering has an interesting feature: the structure function F 2 (x, Q 2 ) for this process is calculable for x > 0.01, and is essentially proportional to the gluon density in the photon for smaller x values. We give estimates for event rates at LEP2 and a Next Linear Collider in x, Q 2 bins, and present differential distributions in the transverse momentum and rapidity of the heavy quark for the case of charm. We include all next-to-leading-order QCD corrections, and find theoretical uncertainties are well under control.

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