Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

Large - p T Photoproduction of D ∗ ± Mesons in ep Collisions

The cross section for the inclusive photoproduction of large-p T D * ± mesons is calculated at next-to-leading order, adopting different approaches to describe the fragmentation of charm quarks into D * ± mesons. We treat the charm quark according to the massless factorization scheme, where it is assumed to be one of the active flavours inside the proton and the photon. We present inclusive sin...

Multiplicity dependence of inclusive p(t) spectra from p-p collisions at root s=200 GeV

existence and approximate $l^{p}$ and continuous solution of nonlinear integral equations of the hammerstein and volterra types

بسیاری از پدیده ها در جهان ما اساساً غیرخطی هستند، و توسط معادلات غیرخطی ‎‏بیان شد‎‎‏ه اند. از آنجا که ظهور کامپیوترهای رقمی با عملکرد بالا، حل مسایل خطی را آسان تر می کند. با این حال، به طور کلی به دست آوردن جوابهای دقیق از مسایل غیرخطی دشوار است. روش عددی، به طور کلی محاسبه پیچیده مسایل غیرخطی را اداره می کند. با این حال، دادن نقاط به یک منحنی و به دست آوردن منحنی کامل که اغلب پرهزینه و ...

Prompt photon production in photoproduction, DIS and hadronic collisions

Recent results on prompt photon production in photoproduction, deeply inelastic scattering and hadronic collisions are reviewed and the importance of photons for LHC experiments is briefly discussed.

Large-p⊥ Heavy-Quark Production in Two-Photon Collisions

The next-to-leading-order (NLO) cross section for the production of heavy quarks at large transverse momenta (p⊥) in γγ collisions is calculated with perturbative fragmentation functions (PFF’s). This approach allows for a resummation of terms ∝ αs ln(p2⊥/m2) which arise in NLO from collinear emission of gluons by heavy quarks at large p⊥ or from almost collinear branching of photons or gluons ...