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Building Beyond the Standard Model: Tools from Cosmology to Particle Theory
Building Beyond the Standard Model: Tools from Cosmology to Particle Theory
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103604
- ISBN
- 9798280719279
- DDC
- 530.1
- 서명/저자
- Building Beyond the Standard Model: Tools from Cosmology to Particle Theory
- 발행사항
- [Sl] : Harvard University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 203 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Reece, Matthew.
- 학위논문주기
- Thesis (Ph.D.)--Harvard University, 2025.
- 초록/해제
- 요약The current landscape of high-energy theory and cosmology suffers from an abundance of theoretical models coupled with a lack of immediate new data to constrain them. This thesis addresses several open questions in early-universe cosmology and beyond-the-Standard-Model (BSM) particle physics, specifically focusing on inflation, dark matter, axions and axion strings, and baryogenesis. Rather than relying solely on forthcoming experimental results, I argue for refining the BSM model space through theoretical consistency checks and cross-examination against multiple existing datasets. For instance, inflationary models often encounter severe naturalness (or η) problems; applying effective field theory techniques and symmetry considerations helps exclude models that fail these theoretical standards. Similarly, axion models naturally predict distinctive topological defects, such as axion strings, allowing their observational signatures (or lack thereof) to impose valuable constraints. On the observational side, I emphasize that jointly analyzing the Hubble and large-scale structure (LSS) tensions can significantly constrain dark-sector theories. Additionally, I introduce a novel observational probe, analyzing the effect of early universe inhomogeneities generated prior to Big Bang Nucleosynthesis (BBN) on predicted deuterium abundances. This probe rules out baryogenesis scenarios that produce excessive inhomogeneities which are not fully erased by diffusion, and it can potentially constrain regions of parameter space in prominent high energy scale models such as electroweak baryogenesis (EWBG). Together, these theoretical and observational approaches offer robust methods for refining the BSM landscape and demonstrate the critical role particle theorists can play in interpreting cosmological data, even in the absence of new experimental results.
- 일반주제명
- Theoretical physics
- 일반주제명
- Particle physics
- 일반주제명
- Physics
- 키워드
- Axion inflation
- 키워드
- Axion strings
- 키워드
- Baryogenesis
- 키워드
- Dark radiation
- 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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■00520260202103604
■006m o d
■007cr#unu||||||||
■020 ▼a9798280719279
■035 ▼a(MiAaPQ)AAI32042632
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530.1
■1001 ▼aBagherian, Hengameh.▼0(orcid)0000-0001-6504-5187
■24510▼aBuilding Beyond the Standard Model: Tools from Cosmology to Particle Theory
■260 ▼a[Sl]▼bHarvard University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a203 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Reece, Matthew.
■5021 ▼aThesis (Ph.D.)--Harvard University, 2025.
■520 ▼aThe current landscape of high-energy theory and cosmology suffers from an abundance of theoretical models coupled with a lack of immediate new data to constrain them. This thesis addresses several open questions in early-universe cosmology and beyond-the-Standard-Model (BSM) particle physics, specifically focusing on inflation, dark matter, axions and axion strings, and baryogenesis. Rather than relying solely on forthcoming experimental results, I argue for refining the BSM model space through theoretical consistency checks and cross-examination against multiple existing datasets. For instance, inflationary models often encounter severe naturalness (or η) problems; applying effective field theory techniques and symmetry considerations helps exclude models that fail these theoretical standards. Similarly, axion models naturally predict distinctive topological defects, such as axion strings, allowing their observational signatures (or lack thereof) to impose valuable constraints. On the observational side, I emphasize that jointly analyzing the Hubble and large-scale structure (LSS) tensions can significantly constrain dark-sector theories. Additionally, I introduce a novel observational probe, analyzing the effect of early universe inhomogeneities generated prior to Big Bang Nucleosynthesis (BBN) on predicted deuterium abundances. This probe rules out baryogenesis scenarios that produce excessive inhomogeneities which are not fully erased by diffusion, and it can potentially constrain regions of parameter space in prominent high energy scale models such as electroweak baryogenesis (EWBG). Together, these theoretical and observational approaches offer robust methods for refining the BSM landscape and demonstrate the critical role particle theorists can play in interpreting cosmological data, even in the absence of new experimental results.
■590 ▼aSchool code: 0084.
■650 4▼aTheoretical physics
■650 4▼aParticle physics
■650 4▼aPhysics
■653 ▼aAxion inflation
■653 ▼aAxion strings
■653 ▼aBaryogenesis
■653 ▼aBeyond the standard model
■653 ▼aBig Bang Nucleosynthesis
■653 ▼aDark radiation
■690 ▼a0753
■690 ▼a0798
■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=T17357815▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
