searching for low mass dark matter particles with a
play

Searching for low-mass dark matter particles with a massive Ge - PowerPoint PPT Presentation

Slides at: bradkav.net/talks.html 1 Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground arXiv:1901.03588, Phys. Rev. D 99, 082003 (2019) Bradley J. Kavanagh GRAPPA, University of Amsterdam working


  1. Slides at: bradkav.net/talks.html 1 Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground arXiv:1901.03588, Phys. Rev. D 99, 082003 (2019) Bradley J. Kavanagh GRAPPA, University of Amsterdam working with the EDELWEISS Collaboration LHC Results Forum - 3rd June 2019 b.j.kavanagh@uva.nl @BradleyKavanagh

  2. Slides at: bradkav.net/talks.html 2 Looking for tiny and tough WIMPs with EDELWEISS-surf arXiv:1901.03588, Phys. Rev. D 99, 082003 (2019) Bradley J. Kavanagh GRAPPA, University of Amsterdam working with the EDELWEISS Collaboration LHC Results Forum - 3rd June 2019 b.j.kavanagh@uva.nl @BradleyKavanagh

  3. EDELWEISS (EDW) Collaboration 3 + Me… [April 2016] Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

  4. <latexit sha1_base64="r8WxWtIX3NnRNyKGounQBojM3is=">ACJHicbVDLSgMxFM34rONr1KWbYFc1DLTCgpui50WcE+oKklk6ZtaDIzJlCGfoxbvwVNy584MKN32KmraCtBwKHc84l9x4/4kxp1/20FhaXldWM2v2+sbm1razs1tVYSwJrZCQh7LuY0U5C2hFM81pPZIUC5/Tmt+/Sv3agErFwuBODyPaFLgbsA4jWBup5VyIFiI9Bo9QV5uUgB5EOSw7kmRXNPqCJkD34y4B7n5wURyhHWk7WzbtjwHniTUkWTFuOW+oHZJY0EATjpVqeG6kmwmWmhFORzaKFY0w6eMubRgaYEFVMxkfOYKHRmnDTijNCzQcq78nEiyUGgrfJNP1ayXiv95jVh3zpsJC6JY04BMPurEHOoQpo3BNpOUaD40BPJzK6Q9LDERJtebVOCN3vyPKkW8l4xX7g9zZYup3VkwD4AMfA2egBG5AGVQAQ/gCbyAV+vRerberY9JdMGazuyBP7C+vgFU8qK9</latexit> <latexit sha1_base64="2nJGzoVtZOM+N/8kUwoO4SuzA=">AB63icbVBNS8NAEJ3Ur1q/qh69LBbBU0lqQY9FLx4r2A9oQ9lsN83S3U3Y3Qgl9C948aCIV/+QN/+NmzYHbX0w8Hhvhpl5QcKZNq7ZQ2Nre2d8q7lb39g8Oj6vFJV8epIrRDYh6rfoA15UzSjmG036iKBYBp71gepf7vSeqNIvlo5kl1Bd4IlnICDa5NCQRG1Vrbt1dAK0TryA1KNAeVb+G45ikgkpDONZ64LmJ8TOsDCOczivDVNMEkyme0IGlEguq/Wx6xdWGWMwljZkgYt1N8TGRZaz0RgOwU2kV71cvE/b5Ca8MbPmExSQyVZLgpTjkyM8sfRmClKDJ9Zgoli9lZEIqwMTaeig3BW315nXQbde+q3nho1lq3RxlOINzuAQPrqEF9CGDhCI4Ble4c0Rzovz7nwsW0tOMXMKf+B8/gABCI42</latexit> Searching for Dark Matter 4 Look for Dark Matter in the form of new W eakly I nteracting M assive P articles ( WIMPs ) Light (scintillation) Detector Target nucleus χ Charge m χ � 1 GeV Heat (ionisation) v χ ∼ 10 − 3 c (phonons) • Low energy nuclear recoils —> need low energy threshold O(keV) • Rare event search —> need large target mass • Large backgrounds —> need shielding and underground labs Galactic ‘wind’ of DM particles Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

  5. Direct Detection Landscape 5 Spin-independent DM-nucleon interactions Spin-dependent DM- neutron interactions �� - �� �� � � � � ��������� - ��� �� - �� �� - � � �������� �� � � - � � � � � � � � ������� �� - �� �� � � � � ���� - �� � � � � � ������ � � - ���� ������ - ������� σ �� � [ �� � ] � ���� ������ - ������� σ �� [ �� � ] �� - �� �� - � � ���� ������ - ������� σ �� � [ �� ] � � � � ���� ������ - ������� σ �� [ �� ] � � � � � � �� - �� �� � � ������ - ��� � EDELWEISS-III � � � � � � � � � � � � ������ - ��� �� ��� - � � �� - �� �� - � � ������ - ��� � � � � - � � � � � � � � � ����� � � �� - �� �� - � � � � � � � � ���� - ���� � - � � � � � � � � �� - �� � �� - � �� - �� �� - � ��� � � � � � � �� - �� �� - �� � �� - �� �� - � �� - �� �� - �� �� - �� �� - � ���� ������ ����� ������� ������� �� ���� ������ ����� ������� ������� �� ����� ����� ���������� �� ������� ��� ����� ����� ���������� �� ������� ��� �������� ��������� ������������ ���������� �������� ��������� ������������ ���������� ������� ��������� �� ��������� ������� ��������� �� ��������� �� - �� �� - �� � �� ��� ���� � �� ��� ���� ���� ������ ���� [ ��� / � � ] ���� ������ ���� [ ��� / � � ] Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

  6. Direct Detection Landscape 6 “Leave no stone unturned!” [Bertone & Tait - 1810.01668] Spin-independent DM-nucleon interactions Spin-dependent DM- neutron interactions �� - �� �� � � � � ��������� - ��� �� - �� �� - � � �������� �� � � - � � � � � � � � ������� �� - �� �� � � � � ���� - �� � � � � � ������ � � - ���� ������ - ������� σ �� � [ �� � ] � ���� ������ - ������� σ �� [ �� � ] �� - �� �� - � � ���� ������ - ������� σ �� � [ �� ] � � � � ���� ������ - ������� σ �� [ �� ] � � � � � � �� - �� �� � � ������ - ��� � EDELWEISS-III � � � � � � � � � � � � ������ - ��� �� ��� - � � �� - �� �� - � � ������ - ��� � � � � - � � � � � � � � � ����� � � �� - �� �� - � � � � � � � � ���� - ���� � - � � � � � � � � �� - �� � �� - � �� - �� �� - � ��� � � � � � � �� - �� �� - �� � �� - �� �� - � �� - �� �� - �� �� - �� �� - � ���� ������ ����� ������� ������� �� ���� ������ ����� ������� ������� �� ����� ����� ���������� �� ������� ��� ����� ����� ���������� �� ������� ��� �������� ��������� ������������ ���������� �������� ��������� ������������ ���������� ������� ��������� �� ��������� ������� ��������� �� ��������� �� - �� �� - �� � �� ��� ���� � �� ��� ���� ���� ������ ���� [ ��� / � � ] ���� ������ ���� [ ��� / � � ] Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

  7. EDELWEISS-III 7 ~ 20 kg Cryogenic Germanium mass (24 x ~800g FID800 modules) Operated in underground lab in Modane, France (1700 m rock —> 5 μ /m 2 /day) (continuous operation since Summer 2014) 50 cm Polyethylene + 20cm Lead shielding Measure heat and ionisation to discriminate electron and nuclear recoils Energy threshold of 2.5 keV —> sensitivity down to WIMP masses of 4 GeV 496 kg-day exposure reported so far [ EDW: 1603.05120, 1607.03367, 1706.01070] Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

  8. EDELWEISS-surf 8 Technological development for DM searches and coherent neutrino-nucleus scattering RED20: Single 33.4g Ge detector with neutron- transmutation-doped Ge (Ge-NTD) phonon sensor Direct measurement of total deposited energy - no quenching, but also no event discrimination Data taking in a surface lab in Lyon (IPNL) for 6 days with minimal shielding Small ~0.03 kg-day exposure [ EDW: 1703.08957,1803.03463] Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

  9. Why I love EDELWEISS-surf 9 Very low energy threshold: 60 eV Minimal shielding Ge, σ SI = 10 − 30 cm 2 10 11 m χ = 0 . 5 GeV m χ = 1 GeV 10 10 χ d R/ d E R [events/keV/kg/day] m χ = 2 GeV 10 9 10 8 Atmosphere 10 7 Earth Shielding 10 6 10 − 2 10 − 1 10 0 Detector Recoil energy, E R [keV] Tiny WIMPs Tough WIMPs Bradley J Kavanagh (GRAPPA) Tiny, tough WIMPs with EDELWEISS-surf LHC Results Forum - 3rd June 2019

Download Presentation
Download Policy: The content available on the website is offered to you 'AS IS' for your personal information and use only. It cannot be commercialized, licensed, or distributed on other websites without prior consent from the author. To download a presentation, simply click this link. If you encounter any difficulties during the download process, it's possible that the publisher has removed the file from their server.

Recommend


More recommend