New physics interpretations for nonstandard values of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>h</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>Z</mml:mi><mml:mi>γ</mml:mi></mml:mrow></mml:math>
Rafael Boto, Dipankar Das, Jorge C. Romão, Ipsita Saha, João P. Silva
Abstract
Current measurements of the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>h</a:mi><a:mo stretchy="false">→</a:mo><a:mi>Z</a:mi><a:mi>γ</a:mi></a:math> signal strength invite us to speculate about possible new physics interactions that exclusively affect <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:mrow><d:msub><d:mrow><d:mi>μ</d:mi></d:mrow><d:mrow><d:mi>Z</d:mi><d:mi>γ</d:mi></d:mrow></d:msub></d:mrow></d:math> without altering the other signal strengths. Additional consideration of tree unitarity enables us to correlate the nonstandard values of <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:msub><f:mi>μ</f:mi><f:mrow><f:mi>Z</f:mi><f:mi>γ</f:mi></f:mrow></f:msub></f:math> with an upper limit on the scale of new physics. We find that even when <h:math xmlns:h="http://www.w3.org/1998/Math/MathML" display="inline"><h:msub><h:mi>μ</h:mi><h:mrow><h:mi>Z</h:mi><h:mi>γ</h:mi></h:mrow></h:msub></h:math> deviates from the Standard Model value by only 20%, the scale of new physics should be well within the reach of the LHC. Published by the American Physical Society 2024