New physics effects in $R(K^{(*)})$, $B_s\toμ^+μ^-$, and $B^+\to K^+ν{\barν}$
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| Format: | Preprint |
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2025
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| _version_ | 1866914021074010112 |
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| author | Lee, Jong-Phil |
| author_facet | Lee, Jong-Phil |
| contents | We analyze possible new physics (NP) effects on $b\to s$ transition processes, $R(K^{(*)})$, $B_s\toμ^+μ^-$, and $B^+\to K^+ν{\barν}$ decays. Though recent data for $R(K^{(*)})$ and ${\rm Br}(B_s\toμ^+μ^-)$ are compatible with the standard model (SM), there are still rooms for NP beyond the SM. Especially ${\rm Br}(B^+\to K^+ν{\barν})$ is measured to exceed the theoretical predictions. We parameterize the NP effects in a generic way with explicit NP scale $M_{\rm NP}$ and some possible powers of it. For reasonable ranges of NP fermionic couplings we find a window of $3.17~{\rm TeV} \le M_{\rm NP}\le 14.9~{\rm TeV}$ for new particles. When including ${\rm Br}(B^+\to K^+μ^+μ^-)$ and the angular observable $P_5'(B^+\to K^{*+}μ^+μ^-)$ we have a wider range of the window.
Implications of our analysis about specific NP models are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_06370 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | New physics effects in $R(K^{(*)})$, $B_s\toμ^+μ^-$, and $B^+\to K^+ν{\barν}$ Lee, Jong-Phil High Energy Physics - Phenomenology We analyze possible new physics (NP) effects on $b\to s$ transition processes, $R(K^{(*)})$, $B_s\toμ^+μ^-$, and $B^+\to K^+ν{\barν}$ decays. Though recent data for $R(K^{(*)})$ and ${\rm Br}(B_s\toμ^+μ^-)$ are compatible with the standard model (SM), there are still rooms for NP beyond the SM. Especially ${\rm Br}(B^+\to K^+ν{\barν})$ is measured to exceed the theoretical predictions. We parameterize the NP effects in a generic way with explicit NP scale $M_{\rm NP}$ and some possible powers of it. For reasonable ranges of NP fermionic couplings we find a window of $3.17~{\rm TeV} \le M_{\rm NP}\le 14.9~{\rm TeV}$ for new particles. When including ${\rm Br}(B^+\to K^+μ^+μ^-)$ and the angular observable $P_5'(B^+\to K^{*+}μ^+μ^-)$ we have a wider range of the window. Implications of our analysis about specific NP models are discussed. |
| title | New physics effects in $R(K^{(*)})$, $B_s\toμ^+μ^-$, and $B^+\to K^+ν{\barν}$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2502.06370 |