Opportunistic CP violation
Opportunistic CP violation
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机会性CP违规
DOI:
10.1007/jhep06(2023)141
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发表时间:
2023
影响因子:
5.4
通讯作者:
Ruderman, Joshua T.
中科院分区:
文献类型:
--
作者:
Bonnefoy, Quentin;Gendy, Emanuele;Grojean, Christophe;Ruderman, Joshua T.
In the electroweak sector of the Standard Model, CP violation arises through a very particular interplay between the three quark generations, as described by the Cabibbo-Kobayashi-Maskawa (CKM) mechanism and the single Jarlskog invariant J 4. Once generalized to the Standard Model Effective Field Theory (SMEFT), this peculiar pattern gets modified by higher-dimensional operators, whose associated Wilson coefficients are usually split into CP-even and odd parts. However, CP violation at dimension four, ie, at the lowest order in the EFT expansion, blurs this distinction: any Wilson coefficient can interfere with J 4 and mediate CP violation. In this paper, we study such interferences at first order in the SMEFT expansion, 𝒪 (1/Λ 2), and we capture their associated parameter space via a set of 1551 linear CP-odd flavor invariants. This construction describes both new, genuinely CP-violating quantities as well as the interference between J 4 and CP-conserving ones. We call this latter possibility opportunistic CP violation. Relying on an appropriate extension of the matrix rank to Taylor expansions, which we dub Taylor rank, we define a procedure to organize the invariants in terms of their magnitude, so as to retain only the relevant ones at a given precision. We explore how this characterization changes when different assumptions are made on the flavor structure of the SMEFT coefficients. Interestingly, some of the CP-odd invariants turn out to be less suppressed than J 4, even when they capture opportunistic CPV, demonstrating that CP-violation in the SM, at dimension 4, is accidentally small.
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影响因子:
4.4
作者:
Jason Aebischer;C. Bobeth;A. Buras;J. Gerard;D. Straub
通讯作者:
D. Straub
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
M. Leurer;Y. Nir;N. Seiberg
通讯作者:
N. Seiberg
DOI:
10.1140/epjc/s10052-012-2126-7
发表时间:
2012
期刊:
The European Physical Journal C
影响因子:
--
作者:
G. Blankenburg;G. Isidori;J. Jones
通讯作者:
J. Jones
DOI:
10.1140/epjc/s10052-019-6715-6
发表时间:
2018
期刊:
The European Physical Journal C
影响因子:
--
作者:
Jason Aebischer;C. Bobeth;A. Buras;D. Straub
通讯作者:
D. Straub
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
J. Bernabeu;G. Branco;M. Gronau
通讯作者:
M. Gronau