In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
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(Universidad de Valencia - IFIC)
Aula Edificio 22 (Laboratori Nazionali di Frascati)
Aula Edificio 22
Laboratori Nazionali di Frascati
Vicente Vento, Universidad de Valencia - IFIC
BABAR data on the pion transition form factor have caused concern about the theoretical description thus far employed.
We present here a formalism based on a low energy description, supported by constituent quark models, and a high energy description which match at a scale of $\sim 1 $ GeV. The high energy description incorporates a flat pion distribution amplitude at the matching scale $Q_0$, QCD evolution for $Q > Q_0$ and higher twist effects. The procedure produces an excellent description of the data.