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Peering From the Parapet of Perturbative QFT
Peering From the Parapet of Perturbative QFT
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103531
- ISBN
- 9798280720626
- DDC
- 530.1
- 서명/저자
- Peering From the Parapet of Perturbative QFT
- 발행사항
- [Sl] : Harvard University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 294 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Schwartz, Matthew D.
- 학위논문주기
- Thesis (Ph.D.)--Harvard University, 2025.
- 초록/해제
- 요약Modern experiments such as the Large Hadron Collider probe new physics through precise measurements that over-constrain Standard Model parameters to sub-percent accuracy, alongside broad searches for beyond-Standard-Model signals. Central to these efforts is perturbation theory, which approximates quantum field theory computations as series expansions in small parameters. Although the complete result lies in the full series, only the first few terms are computationally accessible, raising the question: when can perturbative predictions be trusted, and what alternatives exist when they fail? In this dissertation, we demonstrate that effective field theories (EFTs) can restore convergence by resumming perturbative series to all orders in the coupling. We illustrate this approach with examples from backward scattering in gauge theories, and the extraction of the strong coupling constant using heavy jet mass distribution from electron-positron colliders. Furthermore, by leveraging precision experimental data, we refine power counting in bottom-up flavor EFTs, imposing strong constraints on UV models of the SM flavor hierarchy. Finally, we address the breakdown of perturbation theory--manifested in non-convergent asymptotic series--by interpreting diagrammatic renormalons as saddle points of the effective action, thereby developing a new probe into their existence via the path integral.
- 일반주제명
- Theoretical physics
- 일반주제명
- Particle physics
- 일반주제명
- Physics
- 일반주제명
- Quantum physics
- 키워드
- Renormalons
- 키워드
- Resummation
- 기타저자
- Harvard University Physics
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798280720626
■035 ▼a(MiAaPQ)AAI32039985
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530.1
■1001 ▼aBhattacharya, Arindam Sonali Amar.▼0(orcid)0000-0002-4457-8926
■24510▼aPeering From the Parapet of Perturbative QFT
■260 ▼a[Sl]▼bHarvard University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a294 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Schwartz, Matthew D.
■5021 ▼aThesis (Ph.D.)--Harvard University, 2025.
■520 ▼aModern experiments such as the Large Hadron Collider probe new physics through precise measurements that over-constrain Standard Model parameters to sub-percent accuracy, alongside broad searches for beyond-Standard-Model signals. Central to these efforts is perturbation theory, which approximates quantum field theory computations as series expansions in small parameters. Although the complete result lies in the full series, only the first few terms are computationally accessible, raising the question: when can perturbative predictions be trusted, and what alternatives exist when they fail? In this dissertation, we demonstrate that effective field theories (EFTs) can restore convergence by resumming perturbative series to all orders in the coupling. We illustrate this approach with examples from backward scattering in gauge theories, and the extraction of the strong coupling constant using heavy jet mass distribution from electron-positron colliders. Furthermore, by leveraging precision experimental data, we refine power counting in bottom-up flavor EFTs, imposing strong constraints on UV models of the SM flavor hierarchy. Finally, we address the breakdown of perturbation theory--manifested in non-convergent asymptotic series--by interpreting diagrammatic renormalons as saddle points of the effective action, thereby developing a new probe into their existence via the path integral.
■590 ▼aSchool code: 0084.
■650 4▼aTheoretical physics
■650 4▼aParticle physics
■650 4▼aPhysics
■650 4▼aQuantum physics
■653 ▼aEffective field theories
■653 ▼aRenormalons
■653 ▼aResummation
■653 ▼aSoft collinear effective theory
■690 ▼a0753
■690 ▼a0798
■690 ▼a0599
■690 ▼a0605
■71020▼aHarvard University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0084
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357576▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
