Neutrino Properties Group----Institute of Modern Physics

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Neutrino Properties Group

Brief Introduction

Research Fields

Achievements

Photos

Contact

Brief Introduction

Neutrino physics is a hot topic of the particle physics research. The oscillation of neutrino suggests that it has non-zero mass, which contradicts the standard model prediction and is the only implication of new physics beyond standard model. The origin of neutrino mass and its absolute mass scale as well as its mass hierarchy are the keys for our search of new physics beyond standard model. If neutrinos are Majorana fermions, one could introduce the seesaw mechanism to explain its tiny mass, and subsequently explain the matter-antimatter asymmetry in our universe via the violation of baryon number and CP parity induced by lepton number violation. This asymmetry is critical for the existence of our current world, which is made of matter, as well as our civilization.

Neutrinoless double beta decay is the perfect experiment to prove above ansatz of lepton number violation.

The Neutrino group of QMRC will develop the NνDEx experiment at China Jinping Underground Laboratory (CJPL), as well as related high precision theoretical calculations, to search for neutrinoless double beta decay and distinguish its mechanism. Our final goal is to find new physics beyond the standard model, and to answer questions such as the nature of neutrino and the matter-antimatter asymmetry of early universe.

Research Fields

Experiment:

We will develop an experiment: No neutrino Double-beta Experiment (NνDEx) to be located in CJPL. The NνDEx project plans to take advantage of the recent development of the topmetal silicon sensors and construct a high pressure 82SeF6 gas gainless TPC, in order to achieve high sensitivity to neutrinoless double beta decay, by having high decay Q-value, high energy resolution, and the ability to distinguish signal and background via their different geometric characteristics.

Theory:

With state-of-art nuclear structure theory, we calculate various observables of double beta decay, such as half-lives, electron spectra and their angular distribution.

We also actively engage in studies such as neutrino oscillations and new physics beyond standard model.

Achievements

Photos

Contact

Dr. FANG DongLiang

Email: dlfang@impcas.ac.cn

Mailing Address: 509 Nanchang Road, Lanzhou, 730000, China