# Physics Division

## Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics
related subjects. Usually these are held in the Building 6008
large Conference Room, at 3:00 pm on the chosen day, but times
and locations may vary. For more information, contact our seminar
chairman,

Alfredo Galindo-Uribarri

Tel (Office): (865) 574-6124 (FAX): (865) 574-1268

#### Thu., April 16, 2015, at 3:00 PM - 4:00 PM (refreshments served at 2:40 PM)

### The Nuclear Contact

*Nir Barnea, The Hebrew University of Jerusalem, Israel*

Bldg. 6008 Large Conference Room

In a series of papers Tan have shown that for zero range interaction many important
properties of the system are related to a new state variable, the contact, that describes the probability of finding a correlated particle pair. In this talk, we shall define the general nuclear contact matrices, taking into consideration all partial waves and finite-range interactions, extending Tan's work to nuclear physics. The properties of these matrices will be discussed and the following relations will be presented:

(a) The high-energy photoabsorption cross-section, in the quasi-deuteron regime, is related to the nuclear contacts.

(b) Relations between the contacts and one-nucleon and two-nucleon momentum distributions.

(c) A new asymptotic connection between these distributions.

Using experimental and numerical data we evaluate the value of leading nuclear contacts.

Contact: Alfredo Galindo-Uribarri, (865) 574-6124