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Scattering Amplitudes and the Double-Copy Landscape
Scattering Amplitudes and the Double-Copy Landscape
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103638
- ISBN
- 9798314873342
- DDC
- 530
- 저자명
- Chen, Shih-Kuan.
- 서명/저자
- Scattering Amplitudes and the Double-Copy Landscape
- 발행사항
- [Sl] : University of Michigan, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 94 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
- 주기사항
- Advisor: Elvang, Henriette.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2025.
- 초록/해제
- 요약The double copy is a well-known relation between gauge and gravitational theories at the level of scattering amplitudes, allowing color-ordered amplitudes from two gauge theories to be combined via a double-copy kernel to yield the amplitude of a third gravitational theory. This is a surprising result, as straightforwardly multiplying two amplitudes could violate the factorization property of scattering amplitudes. Consistency of double copy demands that the multiplicative rule incorporate an identity model, which is realized in field-theory double copy by the bi-adjoint scalar theory (BAS). In this work, we explore the generalization of the double copy in the context of effective field theories (EFTs). Previous studies demonstrated that for any legitimate generalized double copy, the identity model corresponds to a bi-adjoint scalar EFT (BAS EFT) whose amplitude must exhibit "minimal rank." We bootstrap these BAS EFT identity models by imposing the minimal rank condition and discover that, at 6 points, compatibility with factorization significantly restricts the solutions to a form resembling string theory. Specifically, we introduce a class of solutions termed "hybrid models," which satisfy the field-theory Kleiss-Kuijf (KK) and Bern-Carrasco-Johansson (BCJ) relations for one of the two color orderings. Remarkably, the other color ordering is then found to exhibit an emergent set of linear relations, as verified at 4 points to 36-derivative order and 5 points to 12-derivative order, precisely the string monodromy relations. Furthermore, we demonstrate that these hybrid models are nothing but a slight generalization of the Z-theories, if one treats the multiple zeta values (MZVs) in the low-energy expansion of the Z-theory amplitude as free parameters. We propose that general BAS EFT identity models can be written as a field-theory double copy of two hybrid models, and we provide numerical evidence at 4, 5, and 6 points. Our study suggests that the only consistent generalization of double copy must manifest string-theory-like structures, highlighting a close connection to MZVs and number theory.
- 일반주제명
- Physics
- 일반주제명
- High temperature physics
- 일반주제명
- Theoretical physics
- 키워드
- Hybrid models
- 기타저자
- University of Michigan Physics
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358063
■00520260202103638
■006m o d
■007cr#unu||||||||
■020 ▼a9798314873342
■035 ▼a(MiAaPQ)AAI32092491
■035 ▼a(MiAaPQ)umichrackham006148
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aChen, Shih-Kuan.
■24510▼aScattering Amplitudes and the Double-Copy Landscape
■260 ▼a[Sl]▼bUniversity of Michigan▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a94 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-11, Section: B.
■500 ▼aAdvisor: Elvang, Henriette.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2025.
■520 ▼aThe double copy is a well-known relation between gauge and gravitational theories at the level of scattering amplitudes, allowing color-ordered amplitudes from two gauge theories to be combined via a double-copy kernel to yield the amplitude of a third gravitational theory. This is a surprising result, as straightforwardly multiplying two amplitudes could violate the factorization property of scattering amplitudes. Consistency of double copy demands that the multiplicative rule incorporate an identity model, which is realized in field-theory double copy by the bi-adjoint scalar theory (BAS). In this work, we explore the generalization of the double copy in the context of effective field theories (EFTs). Previous studies demonstrated that for any legitimate generalized double copy, the identity model corresponds to a bi-adjoint scalar EFT (BAS EFT) whose amplitude must exhibit "minimal rank." We bootstrap these BAS EFT identity models by imposing the minimal rank condition and discover that, at 6 points, compatibility with factorization significantly restricts the solutions to a form resembling string theory. Specifically, we introduce a class of solutions termed "hybrid models," which satisfy the field-theory Kleiss-Kuijf (KK) and Bern-Carrasco-Johansson (BCJ) relations for one of the two color orderings. Remarkably, the other color ordering is then found to exhibit an emergent set of linear relations, as verified at 4 points to 36-derivative order and 5 points to 12-derivative order, precisely the string monodromy relations. Furthermore, we demonstrate that these hybrid models are nothing but a slight generalization of the Z-theories, if one treats the multiple zeta values (MZVs) in the low-energy expansion of the Z-theory amplitude as free parameters. We propose that general BAS EFT identity models can be written as a field-theory double copy of two hybrid models, and we provide numerical evidence at 4, 5, and 6 points. Our study suggests that the only consistent generalization of double copy must manifest string-theory-like structures, highlighting a close connection to MZVs and number theory.
■590 ▼aSchool code: 0127.
■650 4▼aPhysics
■650 4▼aHigh temperature physics
■650 4▼aTheoretical physics
■653 ▼aScattering amplitudes
■653 ▼aHigh-energy theoretical physics
■653 ▼aEffective field theories
■653 ▼aMultiple zeta values
■653 ▼aHybrid models
■690 ▼a0605
■690 ▼a0753
■690 ▼a0597
■71020▼aUniversity of Michigan▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g86-11B.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358063▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


