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The B anomalies and new physics in b → se+e−

Authors: Jacky Kumar; David London; Alakabha Datta;

The B anomalies and new physics in b → se+e−

Abstract

We investigate the implications of the latest LHCb measurement of $R_K$ for NP explanations of the $B$ anomalies. The previous data could be explained if the $b \to s ��^+ ��^-$ NP is in (I) $C_{9,{\rm NP}}^{����}$ or (II) $C_{9,{\rm NP}}^{����} = -C_{10,{\rm NP}}^{����}$, with scenario (I) providing a better explanation than scenario (II). This continues to hold with the new measurement of $R_K$. However, for both scenarios, this measurement leads to a slight tension of $O(1��)$ between separate fits to the $b \to s ��^+ ��^-$ and $R_{K^{(*)}}$ data. In this paper, we investigate whether this tension can be alleviated with the addition of NP in $b \to s e^+ e^-$. In particular, we examine the effect of adding such NP to scenarios (I) and (II). We find several scenarios in which this leads to improvements in the fits. $Z'$ and LQ models with contributions to both $b \to s ��^+ ��^-$ and $b \to s e^+ e^-$ can reproduce the data, but only within scenarios based on (II). If the tension persists in future measurements, it may be necessary to consider NP models with more than one particle contributing to $b \to s \ell^+ \ell^-$.

16 pages, 5 figures. (1) Replaced all qualitative comparisons of scenarios by quantitative comparisons using p-values. (2) Removed all LFU/LFUV descriptions of scenarios, leaving only: we show the addition of NP to $b \to s e^+ e^-$ (LFUV NP) can improve the description of data. This is in contrast to other analyses, that claim that additional LFU NP is required. Made other minor changes to text

Keywords

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Physics, QC1-999, FOS: Physical sciences

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
95
Top 1%
Top 10%
Top 1%
Green
gold