th / 0 60 90 30 v 1 1 3 Se p 20 06 Slow proton production in semi - inclusive DIS off nuclei : the role of final state interaction
نویسنده
چکیده
Semi inclusive Deep Inelastic Scattering (SIDIS) of leptons off nuclei can provide relevant information on: (i) possible modification of the nucleon structure function in medium (EMC-like effects), (ii) the relevance of exotic configurations at short NN distances; (iii) the mechanism of quark hadronization (see e.g. [ 1]). A process which attracted much interest from both the theoretical [ 2, 3] and experimental [ 4] points of view is the production of slow protons, i.e. the process A(l,l’p)X. In plane wave impulse approximation (PWIA), after the hard collision of γ with a quark of a bound nucleon, two main mechanisms of production of slow protons have been considered; they are depicted in Figs. 1a and 1b and represent, respectively, the target fragmentation mechanism and the spectator mechanism. The latter occurs because of nucleon-nucleon (NN) correlations, namely γ is absorbed by a nucleon of a correlated pair and the second nucleon (the spectator nucleon) is emitted by recoil and detected in coincidence with the scattered lepton [ 1]. The spectator mechanism has been intensively investigated (see e.g. [ 2, 3]), but most calculations either completely disregard the effects of the final state interaction, or considered them within simple models. In this contribution the first results of the calculation of the cross section for the spectator mechanism within a realistic approach for the treatment of the FSI are presented. A full account of our approach will be given elsewhere [ 5].
منابع مشابه
th / 0 60 70 03 v 2 1 4 Se p 20 06 Final State Interaction Effects in the e + e − → NN̄ Process near Threshold
متن کامل
uc l - th / 0 60 20 54 v 1 1 7 Fe b 20 06 ω attenuation in nuclei
We study inclusive ω photoproduction in nuclei and propose a measurement of the nuclear transparency ratio as a means to learn about the in-medium properties of the ω meson. To this end we are using the semi-classical coupled-channel BUU transport approach that allows for a consistent treatment of all nuclear effects. The conditions of our calculations are chosen such as to match the setup of e...
متن کاملSemi-inclusive deep inelastic lepton scattering off complex nuclei
It is shown that in semi-inclusive deep inelastic scattering (DIS) of electrons off a complex nucleus A, the detection, in coincidence with the scattered electron, of a nucleus (A− 1) in the ground state, as well as of a nucleon and a nucleus (A − 2), also in the ground state, may provide unique information on several long standing problems, such as : i) the nature and the relevance of the fina...
متن کامل20 2 v 1 1 9 Se p 20 06 Coherent Multiple Scattering Effect in DIS ⋆
We present a QCD calculation of the coherent multiple scattering effect on single hadron production in semi-inclusive lepton-nucleus deep inelastic scattering (DIS). We show that the destructive interference of coherent multiple scattering leads to suppression in hadron productions. The suppression is similar to the expectations of energy loss calculations. We compare our calculation with exper...
متن کامل- th / 0 60 90 79 v 1 2 9 Se p 20 06 1 FEW BODY RESERCH - SUMMARY
Few-body research history, achievements, current development and challenges are presented .
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 2006