Institute for Nuclear and Particle Astrophysics (INPA) at LBNL

The INPA Seminar weekly talks are on Fridays, starting at 12:00 pm, unless informed otherwise. The seminar talk starts with a brief presentation of the weekly scientific news. Typically, the talks conclude by 1:00 pm. The seminars are held in the Sessler Conference Room,  located in Bldg. 50A- 5132.

The committee members are:

The seminar schedule for the Institute for Nuclear and Particle Astrophysics (INPA) is tentative and becomes final a few days before the Friday talk.

Please send all suggestions for future INPA talks and speakers to the INPA Committee.

To be added to the INPA News Mailing List, please contact Erica Hall.

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[EVENT CANCELED]:SPEAKER: Jonathan Echevers (UCB)-TITLE: The EXO program: Neutrinoless Double-Beta Decay Searches in Xe-136

March 17, 2023 @ 12:00 pm - 1:00 pm



This is an In-Person [HYBRID] Event

LOCATION: Sessler Conference Room – 50A – 5132

DATE: March 17, 2023

TIME: 12:00 PM

TITLE: The EXO program: Neutrinoless Double-Beta Decay Searches in Xe-136

ABSTRACT: Neutrinoless double beta (0vBB) decay is currently one of the most compelling searches in nuclear and particle physics. If found, it would imply the existence of Majorana fermions and lepton number violation, both new physics beyond the Standard Model. The EXO-200 experiment consisted of a time projection chamber (TPC) with 200 kg of enriched liquid xenon (LXe), optimized to search for 0vBB of Xe-136. Data acquisition took place from 2011 to the end of 2018, with a total exposure of 234.1kg yr. We found no statistically significant evidence for 0vBB, leading to a lower limit on the half-life of 3.5×10^25 yr at the 90% confidence level (CL). The ultra-low background necessary for this search also provides a unique opportunity to probe other exotic processes, such as Lorentz violation in double-beta decay, electron recoils from dark matter, Majoron emitting modes of double-beta decay, and others. The first part of this talk will focus on the EXO-200 experiment and recent results for exotic-physics searches using this detector. In the second half of this presentation I will discuss the next generation experiment, nEXO, a 5 tonne LXe TPC with a projected 0vBB half-life sensitivity of 1.35×10^28 yr at the 90% CL in 10 years of data-taking.


Join Zoom Meeting:

Meeting ID: 950 1669 6011
Passcode: 247722


March 17, 2023
12:00 pm - 1:00 pm

INPA guests from campus can now come to the lab early on Fridays. The INPA Common Room (50-5026) is reserved for our guests from 10:00 a.m. to 12:00 noon and from 1 p.m. to 5 p.m. Note that the seminars are now held in 50A-5132 to accommodate a more significant number of attendees.

CPTea Series (also known as INPA Tea Series)

The Physics Division CPTea Series invites you to an In-Person Tea Series 1st Friday of every month at 3:30 pm INPA Conference Room 50-5026.

Everyone is welcome to attend the open forum. Tea and light refreshments will be served.


INPA Common Room (50-5026)
3:30 pm

Access to the Lab

For a shuttle pass, please email Erica Hall. The pass is only valid for the day of the seminar.

Erica Hall