Prospects for Probing Axionlike Particles at a Future Hadron Collider through Top Quark Production
Axionlike particles (ALPs) emerge from spontaneously broken global symmetries in high energy extensions of the Standard Model (SM). This causes ALPs to be among the objectives of future experiments that intend to search for new physics beyond the SM. We discuss the reach of future pp collider FCC-hh...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-05-01
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| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/8/6/301 |
| Summary: | Axionlike particles (ALPs) emerge from spontaneously broken global symmetries in high energy extensions of the Standard Model (SM). This causes ALPs to be among the objectives of future experiments that intend to search for new physics beyond the SM. We discuss the reach of future pp collider FCC-hh in probing the ALP model parameters through top quark pair production associated with ALP (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>t</mi><mover accent="true"><mi>t</mi><mo>¯</mo></mover><mo>+</mo><mi>ALP</mi></mrow></semantics></math></inline-formula>) in a model-independent approach. The search is performed in the semi-leptonic decay mode of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>t</mi><mover accent="true"><mi>t</mi><mo>¯</mo></mover></mrow></semantics></math></inline-formula> and the analysis is performed using a parametric simulation of the detector response for a projected integrated luminosity of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>30</mn><mspace width="3.33333pt"></mspace><msup><mi>ab</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></semantics></math></inline-formula>. It is shown that <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>t</mi><mover accent="true"><mi>t</mi><mo>¯</mo></mover><mo>+</mo><mi>ALP</mi></mrow></semantics></math></inline-formula> production at the FCC-hh is a promising channel with significant sensitivity to probe the ALP coupling with gluons. The ALP coupling with gluons obtained from HL-LHC and other experiments is presented for comparison. |
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| ISSN: | 2218-1997 |