ar X iv : h ep - p h / 98 10 45 0 v 1 2 2 O ct 1 99 8 Virtual Photon Structure from Low Q 2 Jet Production
نویسندگان
چکیده
We review next-to-leading order calculations of oneand two-jet production in ep collisions at HERA for photon virtualities in the range 1 < Q < 100 GeV. Soft and collinear singularities are extracted using the phase space slicing method. Numerical results are presented for HERA conditions with the Snowmass jet definition. The transition between photoproduction and deep-inelastic scattering is studied. We discuss the comparison with recent H1 data of the dijet rate and differential dijet cross sections with special attention to the region, in which two jets have equal transverse momenta.
منابع مشابه
ar X iv : h ep - p h / 98 10 52 7 v 1 2 9 O ct 1 99 8 HIGHER - TWIST CONTRIBUTIONS IN EXCLUSIVE PROCESSES
Using the renormalon technique, we estimate higher-twist contributions in deeply virtual Compton scattering and in hard exclusive π 0 leptoproduction.
متن کاملar X iv : h ep - p h / 98 07 40 2 v 1 1 7 Ju l 1 99 8 hep - ph / yymmnn IISc - CTS / 7 / 98 Resolved Photon Processes ∗
After giving a very brief introduction to the resolved photon processes , I will summarise the latest experimental information from HERA, on resolved photon contribution to large p T jet production as well as to direct photon production. I will point out the interesting role that resolved photon processes can play in increasing our understanding of the dynamics of the Quarkonium production. I w...
متن کاملar X iv : h ep - p h / 97 07 27 7 v 1 8 J ul 1 99 7 PRA – HEP / 97 – 10 VIRTUAL PHOTON STRUCTURE FROM JET PRODUCTION
Some aspects of extracting the information on the structure of virtual photons from jet production in ep and e + e − collisions are discussed. 1 Virtual particles-why, where and how? Measuring the dependence of the structure of the photon at short distance on its virtuality provides new information on strong interaction dynamics. The results of first attempts in this direction have recently bee...
متن کاملar X iv : h ep - e x / 99 09 02 3 v 1 1 4 Se p 19 99 Experimental Results on Two - Photon Physics from LEP
This review covers selected results from the LEP experiments on the structure of quasi-real and virtual photons. The topics discussed are the total hadronic cross-section for photon-photon scattering, hadron production, jet cross-sections, heavy quark production for photon-photon scattering, photon structure functions, and crosssections for the exchange of two virtual photons.
متن کاملar X iv : h ep - p h / 98 10 43 3 v 1 2 1 O ct 1 99 8 SPIN AND ORBITAL ANGULAR MOMENTUM IN THE CHIRAL QUARK MODEL
Quark spin and orbital angular momentum in the nucleon are calculated in symmetry-breaking chiral quark model. The results are compared with data and other models. Synopsis: Recent measurements show (1) strong flavor asymmetry of the antiquark sea 1 : ¯ d > ¯ u, (2) nonzero strange quark content 2 : < ¯ ss > = 0, (3) sum of quark spins is small 3 : < s z > q+¯ q = 0.1 − 0.2, and (4) antiquark s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998