# A new measurement of the ${}^{2}H(p,\gamma)^{3}He$ cross section in the BBN energy range at LUNA.

Ferraro F. per la Collaborazione LUNA

Comunicazione
I - Fisica nucleare e subnucleare
Aula Palazzo dell'Emiciclo - Sala Ipogea - Martedì 24 h 17:30 - 19:30
Given the baryon density, Big Bang Nucleosynthesis (BBN) provides the abundances of primordial elements. Because of the paucity of data on the ${}^{2}H(p,\gamma)^{3}He$ cross section at the relevant energies, the abundance of deuterium deduced from Cosmic Microwave Background observations is more accurate with respect to the BBN prediction. The LUNA collaboration used two different setups (high efficiency and high resolution) to measure the ${}^{2}H(p,\gamma)^{3}He$ cross section at BBN energies (30--300 keV), pushing down the accuracy to reduce the uncertainty of the BBN prediction and better constrain the Standard Cosmological Model.