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Stray Fields and the Electron's Electric Dipole Moment
Stray Fields and the Electron's Electric Dipole Moment
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151025
- ISBN
- 9798382718439
- DDC
- 539
- 저자명
- Wright, T. H.
- 서명/저자
- Stray Fields and the Electrons Electric Dipole Moment
- 발행사항
- [Sl] : University of Colorado at Boulder, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 233 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Cornell, Eric.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2024.
- 초록/해제
- 요약The universe is full of matter, and we cannot explain how it got there. According to our most accurate theory of particle physics, the Standard Model, the big bang created equal parts matter and antimatter. In the billions of years since, matter and antimatter should have collided and annihilated, leaving (almost) nothing behind. This obviously is not what happened; we live inside of an entire universe made of matter. Despite this serious shortcoming, the Standard Model is outrageously successful in predicting how particles will behave in experiments here on Earth. To salvage the Standard Model, new theories tack on as-of-yet undiscovered particles and interactions that violate the symmetry between matter and antimatter. A side effect of breaking this symmetry is that electrons should have a non-zero electric dipole moment (EDM). In this thesis, I present the world's most precise measurement of the electron EDM to date using electrons confined inside hafnium fluoride molecular ions (HfF+). We trap HfF+ in corotating electric and magnetic fields and measure the electron EDM signal by performing Ramsey spectroscopy with coherence times up to 3 seconds. Our result is consistent with an electron EDM of zero and improves on the previous best upper limit by a factor of ∼ 2.4, further constraining proposed theories of particle physics. I also worked towards a future measurement, hopefully 10x more precise, of the electron EDM using thorium fluoride molecular ions. I discuss the systematic errors we uncovered in our HfF+ measurement that require our future experiment to be magnetically shielded.
- 일반주제명
- Molecular physics
- 일반주제명
- Atomic physics
- 일반주제명
- Physics
- 일반주제명
- Particle physics
- 키워드
- Electron EDM
- 키워드
- Symmetry
- 기타저자
- University of Colorado at Boulder Physics
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151025
■006m o d
■007cr#unu||||||||
■020 ▼a9798382718439
■035 ▼a(MiAaPQ)AAI30996763
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a539
■1001 ▼aWright, T. H.▼0(orcid)0000-0002-9330-8631
■24510▼aStray Fields and the Electron's Electric Dipole Moment
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a233 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Cornell, Eric.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2024.
■520 ▼aThe universe is full of matter, and we cannot explain how it got there. According to our most accurate theory of particle physics, the Standard Model, the big bang created equal parts matter and antimatter. In the billions of years since, matter and antimatter should have collided and annihilated, leaving (almost) nothing behind. This obviously is not what happened; we live inside of an entire universe made of matter. Despite this serious shortcoming, the Standard Model is outrageously successful in predicting how particles will behave in experiments here on Earth. To salvage the Standard Model, new theories tack on as-of-yet undiscovered particles and interactions that violate the symmetry between matter and antimatter. A side effect of breaking this symmetry is that electrons should have a non-zero electric dipole moment (EDM). In this thesis, I present the world's most precise measurement of the electron EDM to date using electrons confined inside hafnium fluoride molecular ions (HfF+). We trap HfF+ in corotating electric and magnetic fields and measure the electron EDM signal by performing Ramsey spectroscopy with coherence times up to 3 seconds. Our result is consistent with an electron EDM of zero and improves on the previous best upper limit by a factor of ∼ 2.4, further constraining proposed theories of particle physics. I also worked towards a future measurement, hopefully 10x more precise, of the electron EDM using thorium fluoride molecular ions. I discuss the systematic errors we uncovered in our HfF+ measurement that require our future experiment to be magnetically shielded.
■590 ▼aSchool code: 0051.
■650 4▼aMolecular physics
■650 4▼aAtomic physics
■650 4▼aPhysics
■650 4▼aParticle physics
■653 ▼aElectron EDM
■653 ▼aSymmetry
■653 ▼aElectric dipole moment
■653 ▼aRamsey spectroscopy
■653 ▼aSystematic errors
■690 ▼a0609
■690 ▼a0748
■690 ▼a0798
■690 ▼a0605
■71020▼aUniversity of Colorado at Boulder▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160468▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
