Speaker
Description
I discuss femtoscopic studies of hadron-hadron interactions mainly from a theoretical point of view. Femtoscopy denotes studies using two-(or more- )particle momentum correlation functions, which are given by the convolution of the source function and the relative
wave function squared. Thus when the source function is known, one can obtain information on the wave function including the interaction effects from the correlation function. The latter approach, femtoscopy for hadron-hadron interactions, has been in strong
progress in recent years.
Femtoscopy is extremely useful for the hadron pairs whose scattering experiment is unavailable. For example, there was no experimental information about the N$\Omega$ interaction, but femtoscopy confirmed the validity of the potential obtained by lattice QCD for the
first time. For $K^-p$ and $\Lambda$p, scattering data exist but have been limited to high-momentum regions. Since the correlation function is sensitive to low energy scattering parameters such as the scattering range, the femtoscopy is powerful to obtain
s-wave hadron-hadron interactions.
In the talk, I first discuss the correlation functions of hadron pairs including strangeness. Femtoscopy has met great successes in hyperon-nucleon (YN) and kaon-nucleon (KN and $\bar{K}N$) interactions. Next, I discuss the relevance of the bound states. The source size dependence of the correlation function can be utilized to guess the existence of a bound state, and some of the bound states have been suggested by the correlation functions. Finally, some of the correlation functions seem to require updates of theoretically proposed hadron-hadron interactions.
| Topic | Heavy Ion Physics |
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