visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-09-22 15:30 
일시 Sep. 22, 2016(Thu), 3:30 PM 
장소 #1323(E6-2, 1st fl.) 
연사 Dr. Haiyang Yan (Institute of Nuclear Physics and Chemistry) 


Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model

 

Dr. Haiyang Yan (Institute of Nuclear Physics and Chemistry)
Sep. 22, 2016(Thu), 3:30 PM,  #1323(E6-2, 1st fl.)


Polarized spins are good probes to detect spin dependent new interactions beyond the standard model. In recent years, various models of new physics beyond the standard model have been studies in which new massive particles such as axion, familon,and majoron, etc. were theoretically introduced. Many of these exotic new interactions are spin dependent. Spin polarized neutron beam, atom beam or noble gases are good probes to detect these new interactions. We used spin rotation of polarized neutrons in liquid Helium to search for spin-velocity dependent new interactions. The new upper bound we obtained is more than 7 orders of magnitude more stringent than the existing laboratory constraints for interaction ranges below 1 m. We Searched for New Spin and Velocity-Dependent Interactions by spin relaxation of polarized 3He Gas. Using the best available measured T2 of polarized 3He gas atoms as the polarized source and the Earth as an unpolarized source, we obtain constraints on two new interactions. We present a new experimental upper bound on possible vector-axial-vector (VVA) type interactions for ranges between 1 and 108m.

번호 날짜 장소 제목
524 2017-07-10 16:00  Jul. 10th (Mon), 4pm  “Intertwined Orders in a Heavy-fermion metal” file
523 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
522 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
521 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
520 2022-03-29 10:00  E6 #1501/zoom, E6 #2502/zoom  Non-reciprocal phase transitions file
519 2022-03-31 10:00  E6 #1501/zoom  Weiss fields for Quantum Spin Dynamics file
518 2023-09-18 11:00  E6-2, #1322  Magic polarisation trapping of polar molecules for tunable dipolar interactions file
517 2023-04-04 16:00  Room 2501, KAIST Natural Sciences Lecture Hall(E6)  Chiral Magnetism: A Geometric Perspective
516 2023-11-15 16:00  E6-6, #119  Quantum hydrodynamic theory for plasmonics: from molecule-coupling to nonlinear optics
515 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
514 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
513 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
512 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
511 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
510 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
509 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
508 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
507 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
506 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
505 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4