[Theory-seminars] Cake seminar Wednesday L104 14:00

[Alexei Prokudin]

Dear all,

we will have a cake seminar on Wednesday at 14:00 in L104

Speaker: Carlos Granados

Title:  Hard breakup of the deuteron into two $\Delta$ -Isobars

Abstract:  Photodisintegration of the deuteron into two $\Delta$-isobars 
at large center of mass angles is studied within the  hard rescattering 
model (HRM). According to the HRM, the reaction proceeds in three main 
steps: the photon knocks the quark from one of the nucleons in the 
deuteron; the struck quark rescatters off a quark from the other nucleon 
sharing the high energy of the photon; then the energetic quarks 
recombine into two outgoing baryons emerging at large transverse 
momenta. Within the HRM, the cross section is expressed through the 
amplitude of $pn\rightarrow \Delta\Delta$ scattering which is evaluated 
based on the quark-interchange model of hard hadronic scattering. The 
resulting cross section of the deuteron breakup to 
$\Delta^{++}\Delta^{-}$ is noticeably larger than that of the breakup to 
the $ \Delta^{+}\Delta^{0}$ channel. Also, the angular distributions for 
these two channels are markedly different. These can be compared with 
the predictions based on the assumption that two hard $\Delta$-isobars 
are the result of the disintegration of initial $\Delta\Delta$ 
components of the deuteron wave function. In such cases, the angular 
distributions and cross sections of the breakup in both $ 
\Delta^{++}\Delta^{-}$ and $\Delta^{+}\Delta^{0}$ channels are expected 
to be similar.

Cake sponsor: Christian


A complete list of upcoming theory seminars and talks from previous
seminars is available from:
http://wwwold.jlab.org/div_dept/theory/seminars/

Alexei, Alvaro and Satoshi
JLab Theory Seminar Organizers