A measurement of the photon structure function F2(gamma) at Q**2 = 6.8-GeV**2.

The AMY collaboration Kojima, T. ; Nozaki, T. ; Abe, K. ; et al.
Phys.Lett.B 400 (1997) 395-400, 1997.
Inspire Record 441558 DOI 10.17182/hepdata.28320

The photon structure function F 2 γ has been measured at an average Q 2 value of 6.8 GeV 2 using data collected by the AMY detector at the TRISTAN e + e − collider. The measured F 2 γ is compared with several QCD-based parton density models.

1 data table

No description provided.


Measurement of D*+- production in two-photon processes at TRISTAN.

The AMY collaboration Takashimizu, N. ; Sasaki, T. ; Miyata, H. ; et al.
Phys.Lett.B 384 (1996) 96009331 481-486, 1996.
Inspire Record 419685 DOI 10.17182/hepdata.38328

The inclusive cross section for the production of charmed D<sup loc="post">∗±</sup> mesons in two-photon processes is measured with the AMY detector at the TRISTAN e<sup loc="post">+</sup>e<sup loc="post">−</sup> collider. D<sup loc="post">∗±</sup> mesons are identified from the distribution of charged-particle transverse momenta relative to the jet axis. A data sample corresponding to an integrated luminosity of 176 pb<sup loc="post">−1</sup> at a center-of-mass energy of 58 GeV is used to determine a cross section σ(e<sup loc="post">+</sup>e<sup loc="post">−</sup> → e<sup loc="post">+</sup>e<sup loc="post">−</sup>D<sup loc="post">∗±</sup>X) = 270 ± 49(stat) ± 38(syst) pb. The results are compared with theoretical expectations based on the Vector Meson Dominance, direct quark-parton model, and resolved photon processes.

2 data tables

No description provided.

Reduced acceptance region to compare with the TOPAZ results.


A High Q**2 measurement of the photon structure function F2(gamma)

The AMY collaboration Sahu, S.K. ; Ebara, S. ; Nozaki, T. ; et al.
Phys.Lett.B 346 (1995) 208-216, 1995.
Inspire Record 392701 DOI 10.17182/hepdata.38361

The photon structure function F 2 γ has been measured at average Q 2 values of 73 and 390 GeV 2 using data collected by the AMY detector at the TRISTAN e + e − collider. F 2 γ is observed to be increasing as ln Q 2 . The x -dependence of F 2 γ , where x is the momentum fraction carried by the parton inside the photon, is also measured. The measurements are compared with several parton density models.

3 data tables

No description provided.

No description provided.

Errors contain both statistics and systematics.


Measurement of the inclusive jet cross-section in photon-photon interactions at TRISTAN

The AMY collaboration Kim, B.J. ; Nozaki, T. ; Bodek, A. ; et al.
Phys.Lett.B 325 (1994) 248-256, 1994.
Inspire Record 361660 DOI 10.17182/hepdata.38388

We present cross section measurements for inclusive jet production in almost-real photon-photon interactions at TRISTAN using the AMY detector. The results are compared with leading-order QCD calculations for different parameterizations of the parton density in the photon.

3 data tables

No description provided.

No description provided.

No description provided.


A Measurement of the photon structure function F2

The AMY collaboration Sasaki, T. ; Yamagishi, Y. ; Tanaka, R. ; et al.
Phys.Lett.B 252 (1990) 491-498, 1990.
Inspire Record 299056 DOI 10.17182/hepdata.29524

The photon structure function F 2 has been measured at average Q 2 values of 73,160 and 390 ( GeV c ) 2 . We compare the x dependence of the Q 2 = 73 ( GeV c ) 2 data with theoretical expectations based on QCD. In addition we present results on the Q 2 evolution of the structure function for the intermediate x range (0.3⩽ x ⩽0.8). The results are consistent with QCD.

4 data tables

X dependence at Q**2 = 73 GeV**2 for light quark data.

X dependence at Q**2 = 73 GeV**2 for total data.

Photon structure function F2 for total data.

More…