arXiv subjects

Hong-An Peng

Publications and source records attributed to Hong-An Peng.

6 recordsLinked to original sources

arXiv1999

$J/ψ+ jet$ diffractive production in the direct photon process at HERA

We present a study of $J/ψ+ jet$ diffractive production in the direct photon process at HERA based on the factorization theorem for lepton-induced hard diffractive scattering and the factorization formalism of the nonrelativistic QCD (NRQCD) for quarkonia production. Using the diffractive gluon distribution function extracted from HERA data on diffractive deep inelastic scattering and diffractive dijet photon production, we show that this process can be studied at HERA with present integrated luminosity, and can give valuable insights in the color-octet mechanism for heavy quarkonia production.

hep-ph↗

arXiv1999

Diffractive $J/ψ$ production through color-octet mechanism in resolved photon processes at HERA

We use the color-octet mechanism combined with the two gluon exchange model for the diffractive $J/ψ$ production in resolved photon processes. In the leading logarithmic approximation in QCD, we find that the diffractive $J/ψ$ production cross section is related to the off-diagonal gluon density of the proton, the gluon density of the photon and to the nonperturbative color-octet $^3 S_{1}^{(8)}$ matrix element of $J/ψ$. The cross section is found to be very sensitive to the gluon density of the photon. As a result, this process may provide a wide window for testing the two-gluon exchange model, studying the nature of hard diffractive factorization breaking and may be particularly useful in studying the gluon distribution of the photon. And it may also be a golden place to test the color-octet mechanism proposed by solving the $ψ'(J/ψ)$ surplus problem at the Tevatron.

hep-ph↗

arXiv1998

Associated jpsi + gamma production through double Pomeron exchange: The nature of the Pomeron and hard diffractive factorization breaking

We present a study of associated jpsi + gamma production through double Pomeron exchange at energies reached at the Fermilab Tevatron and CERN LHC based on the Ingelman-Schlein model for hard diffractive scattering and the factorization formalism of nonrelativistic QCD for quarkonia production. We find that this process (p + pbar \to p + pbar + jpsi + gamma + X) can be used to probe the gluon content of the Pomeron and study the natrue of hard diffractive factorization breaking.

hep-ph↗

arXiv1998

Associated jpsi + gamma diffractive production: the nature of Pomeron and test of hard diffractive factorization

We present a study of diffractive associated jpsi + gamma production at the Fermilab Tevatron and LHC based on the Ingelman-Schlein model for hard diffractive scattering and the factorization formalism of NRQCD for quarkonia production. We find that this process (p + pbar to p + jpsi + gamma + X) can be used to probe the gluon content of the Pomeron and test the assumption of diffractive hard scattering factorization. Using the renormalized Pomeron flux factor D simeq 0.11 (0.052), the single diffractive jpsi + gamma production cross section at 4<P_T< 10 GeV, -1<eta<1 region is found to be of the order of 3.0 pb (8.5 pb), the ratio of single diffractive to inclusive production is 0.50% (0.15%) in central region at the Tevatron (LHC) for the gluon fraction in the Pomeron f_g = 0.7, independent of the values of color-octet matrix elements.

hep-ph↗

arXiv1998

Production of $0^{++} $glueball from double diffractive process in high energy $p+p(\bar p)$ collision

Motivated by the recent experimental data about candidates for glueball from different processes, we discuss in this paper the production of 0^{++} glueball from double diffractive scattering at momentum transfer |t|< 1GeV^2 in high energy p+p(\bar p) collision. We apply the phenomenology of Pomeron (IP) of Donnachie-Landshoff, the field theory model of IP of Landshoff-Nachtmann and the relevant calculating approachs. We assume while IP coupling with glueball, the 0^{++} glueball can be considered as a bound state of two non-perturbative massive gluons. We evaluate the dependence of cross section for 0^{++} glueball production on system energy $\sqrt{s}$ and show that it could be tested experimentally.

hep-ph↗

arXiv1997

What about the contribution from reggeons in hard process of strong interactions?

We discuss in this paper the possible contributions from R_ρ(ρ-reggeon associated with ρmeson) in DIS process on protons. Using results from phenomenological analysis of high energy π-N charge-exchanged scattering process, we get the expression of effective propagator of R_ρand the coupling constant β_ρbetween R_ρand light quarks. As a simple and concrete example, we use them to evaluate the contributions of R_ρto F_2(x,Q^2) from charge-exchanged photoproduction quark-pair process,γ^* + p-->n + q_u + \bar{q}_d (--> n + X), in HERA kinematical regions. For a comparison, we also evaluate contributions both from pomeron and partons in the same process. The ratio of contributions in F_2(x,Q^2) from R_ρversus IP is larger than 1%, therefore, the former may be tested experimentaly.

hep-ph↗