Ismail, A.Z.M.
Structure Function
Max results
Sort by Reverse order

Showing 3 of 3 results

Measurement of F2(c anti-c) and F2(b anti-b) at low Q**2 and x using the H1 vertex detector at HERA.

The H1 collaboration Aktas, A. ; Andreev, V. ; Anthonis, T. ; et al.
Eur.Phys.J.C 45 (2006) 23-33, 2006.
Inspire Record 687625 DOI 10.17182/hepdata.46047

Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality 12 \le Q^2 \le 60 GeV^2 and of the Bjorken scaling variable 0.0002 \le x \le 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. This is the first measurement of F_2^{b\bar{b}} in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and withprevious measurements of F_2^{c\bar{c}}.

8 data tables
Table 1

Measured NC reduced cross section for charm quarks.

Table 2

Measuredstructure function F2 for charm quarks.

Table 3

Measured NC reduced cross section for BOTTOM quarks.

More…

Measurement of F2(c anti-c) and F2(b anti-b) at high Q**2 using the H1 vertex detector at HERA

The H1 collaboration Aktas, A. ; Andreev, V. ; Anthonis, T. ; et al.
Eur.Phys.J.C 40 (2005) 349-359, 2005.
Inspire Record 664364 DOI 10.17182/hepdata.45951

Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality Q^2 > 150 GeV^2 and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q^2 and Bjorken x, and values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics.

10 data tables
Table 1

Charm fraction and cross section.

Table 2

Bottom fraction and cross section.

Table 3

The measured reduced neutral current charm cross sections and structure functions obtained using the NLO QCD fit correct for FL.

More…

Measurement of the proton structure function F2 at low Q**2 in QED Compton scattering at HERA.

The H1 collaboration Aktas, A. ; Andreev, V. ; Anthonis, T. ; et al.
Phys.Lett.B 598 (2004) 159-171, 2004.
Inspire Record 652164 DOI 10.17182/hepdata.46027

The proton structure function F_2(x,Q^2) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q^2, down to 0.5 GeV^2, and Bjorken x up to \sim 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.