Cargando…
A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson?
A peak structure of $J/\psi$ pair production around $6.9~{\rm GeV}$ was observed and analyzed by the LHCb collaboration using the Run I and II data of LHC. How to understand this peak arouses enthusiastic discussions among both theorists and experimentalists of high energy physics, because this disc...
Autores principales: | , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2020
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2759265 |
_version_ | 1780970214902464512 |
---|---|
author | Zhu, Jian-Wen Guo, Xing-Dao Zhang, Ren-You Ma, Wen-Gan Li, Xue-Qian |
author_facet | Zhu, Jian-Wen Guo, Xing-Dao Zhang, Ren-You Ma, Wen-Gan Li, Xue-Qian |
author_sort | Zhu, Jian-Wen |
collection | CERN |
description | A peak structure of $J/\psi$ pair production around $6.9~{\rm GeV}$ was observed and analyzed by the LHCb collaboration using the Run I and II data of LHC. How to understand this peak arouses enthusiastic discussions among both theorists and experimentalists of high energy physics, because this discovery might hint something new. Overwhelming works on this topic tend to attribute the peak as a four-quark state: tetraquark or molecule. Instead, we suggest that this peak is corresponding to a fundamental Higgs-like boson with mass about $6.9~{\rm GeV}$ which is advocated by a BSM effective theory. We present a detailed analysis on both signal and SM background, including integrated cross sections and invariant mass distributions of the final-state $J/\psi$ pair. Our numerical results are well in coincidence with the experimental data, as postulating the resonance observed by LHCb to be a BSM $0^{++}$ scalar. Therefore, the peak at $M_{\text{di-}J/\psi} \sim 6.9~{\rm GeV}$ might be a hint of new physics beyond the SM whose scale is not as large as mostly expected by high energy physicists. More further works are urgently needed in both experimental and theoretical aspects to validate or negate this assumption. |
id | cern-2759265 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27592652021-09-07T02:32:59Zhttp://cds.cern.ch/record/2759265engZhu, Jian-WenGuo, Xing-DaoZhang, Ren-YouMa, Wen-GanLi, Xue-QianA possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson?hep-phParticle Physics - PhenomenologyA peak structure of $J/\psi$ pair production around $6.9~{\rm GeV}$ was observed and analyzed by the LHCb collaboration using the Run I and II data of LHC. How to understand this peak arouses enthusiastic discussions among both theorists and experimentalists of high energy physics, because this discovery might hint something new. Overwhelming works on this topic tend to attribute the peak as a four-quark state: tetraquark or molecule. Instead, we suggest that this peak is corresponding to a fundamental Higgs-like boson with mass about $6.9~{\rm GeV}$ which is advocated by a BSM effective theory. We present a detailed analysis on both signal and SM background, including integrated cross sections and invariant mass distributions of the final-state $J/\psi$ pair. Our numerical results are well in coincidence with the experimental data, as postulating the resonance observed by LHCb to be a BSM $0^{++}$ scalar. Therefore, the peak at $M_{\text{di-}J/\psi} \sim 6.9~{\rm GeV}$ might be a hint of new physics beyond the SM whose scale is not as large as mostly expected by high energy physicists. More further works are urgently needed in both experimental and theoretical aspects to validate or negate this assumption.arXiv:2011.07799oai:cds.cern.ch:27592652020-11-16 |
spellingShingle | hep-ph Particle Physics - Phenomenology Zhu, Jian-Wen Guo, Xing-Dao Zhang, Ren-You Ma, Wen-Gan Li, Xue-Qian A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson? |
title | A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson? |
title_full | A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson? |
title_fullStr | A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson? |
title_full_unstemmed | A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson? |
title_short | A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson? |
title_sort | possible interpretation for $x(6900)$ observed in four-muon final state by lhcb -- a light higgs-like boson? |
topic | hep-ph Particle Physics - Phenomenology |
url | http://cds.cern.ch/record/2759265 |
work_keys_str_mv | AT zhujianwen apossibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT guoxingdao apossibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT zhangrenyou apossibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT mawengan apossibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT lixueqian apossibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT zhujianwen possibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT guoxingdao possibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT zhangrenyou possibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT mawengan possibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson AT lixueqian possibleinterpretationforx6900observedinfourmuonfinalstatebylhcbalighthiggslikeboson |