2019/03/31 by Ashutosh Kumar Alok, Amol Dighe, Shireen Gangal +1 · 3 citations
Physics and Astronomy · #Algebra over a field #Modern physics #Neutrino Physics Research #Observable #Operator (biology) #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep06(2019)089
published as JHEP06(2019)089 · 20 pages, 2 figures; Added an appendix with updated fit results by taking into account the LHCb results between March 2019 and March 2021 (including R_K update in Moriond 2021)
openalex created_date 2019/04/01 · openalex publication_date 2019/06/01 · arxiv created 2021/03/24 · arxiv updated 2021/03/25 · openalex updated_date 2026/08/05
A bstract The anomalies in the measurements of observables involving b → sμμ decays, namely R K , R K * , P 5 ′ , and B s ϕ , may be addressed by adding lepton-universality-violating new physics contributions to the effective operators O9,O10,O9′ ,O10′ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> </mml:msub> <mml:mo>,</mml:mo> <mml:msub> <mml:mi>O</mml:mi> <mml:mn>10</mml:mn> </mml:msub> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mo>′</mml:mo> </mml:msubsup> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>10</mml:mn> <mml:mo>′</mml:mo> </mml:msubsup> </mml:math> . We analyze all the scenarios where the new physics contributes to a pair of these operators at a time. We perform a global fit to all relevant data in the b → s sector to estimate the corresponding new Wilson coefficients, O9NP,O10NP,O9′ ,O10′ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mrow> <mml:mi>N</mml:mi> <mml:mi>P</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>10</mml:mn> <mml:mrow> <mml:mi>N</mml:mi> <mml:mi>P</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mo>′</mml:mo> </mml:msubsup> <mml:mo>,</mml:mo> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>10</mml:mn> <mml:mo>′</mml:mo> </mml:msubsup> </mml:math> . In the light of the new data on R K , and R K * , presented in Moriond 2019, we find that the scenarios with new physics contributions to the (O9NP,O9′) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mrow> <mml:mi>N</mml:mi> <mml:mi>P</mml:mi> </mml:mrow> </mml:msubsup> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mo>′</mml:mo> </mml:msubsup> </mml:mfenced> </mml:math> or (O9NP,O10′) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mrow> <mml:mi>N</mml:mi> <mml:mi>P</mml:mi> </mml:mrow> </mml:msubsup> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>10</mml:mn> <mml:mo>′</mml:mo> </mml:msubsup> </mml:mfenced> </mml:math> pair remain the most favored ones. On the other hand, though the competing scenario (O9NP,O10NP) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> <mml:mrow> <mml:mi>N</mml:mi> <mml:mi>P</mml:mi> </mml:mrow> </mml:msubsup> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>10</mml:mn> <mml:mrow> <mml:mi>N</mml:mi> <mml:mi>P</mml:mi> </mml:mrow> </mml:msubsup> </mml:mfenced> </mml:math> remains attractive, its advantage above the SM reduces significantly due to the tension that emerges between the R K and R K * measurements with the new data. The movement of the R K measurement towards unity would also result in the re-emergence of the one-parameter scenario C 9 NP = − C 9 ′ .