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SUMMARY:Probing squared four-fermion operators of SMEFT with meson-mixing
DTSTART;VALUE=DATE-TIME:20210726T130000Z
DTEND;VALUE=DATE-TIME:20210726T131500Z
DTSTAMP;VALUE=DATE-TIME:20211022T025455Z
UID:indico-contribution-106111@indico.desy.de
DESCRIPTION:Speakers: Luiz Vale Silva ()\nThe Standard Model Effective Fie
ld Theory (SMEFT) is a universal way of probing New Physics (NP) manifesti
ng as new\, heavy particle interactions with the Standard Model degrees of
freedom\, that respect the SM gauged symmetries. Higher order terms in th
e NP interactions possibly lead to large effects\, mandatory for meaningfu
l phenomenological studies\, such as contributions to neutral meson-mixing
\, which typically pushes the scale of NP to energy scales much beyond the
reach of direct searches in colliders. I discuss for the first time the l
eading-order renormalization of double-insertions of dimension-6 four-ferm
ion operators that change quark flavor by one unit (i.e.\, $ | \\Delta F |
= 1 $\, $ F = $ strange-\, charm-\, or bottom-flavor) by dimension-8 oper
ators relevant for meson-mixing (i.e.\, $ | \\Delta F | = 2 $) in SMEFT\,
and consider the phenomenological implications of contributions proportion
al to relatively large Yukawas. Given the underlying interest of SMEFT to
encode full-fledged models at low-energies\, this work stresses the need o
f considering dimension-8 operators in phenomenological applications of di
mension-6 operators of SMEFT.\n\nhttps://indico.desy.de/event/28202/contri
butions/106111/
LOCATION:Zoom
URL:https://indico.desy.de/event/28202/contributions/106111/
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