Mixed electroweak-QCD corrections to e+e-μ+μ-H at CEPC with finite-width effect

  • The associated production of Higgs boson with a muon pair, e+e-μ+μ-H, is one of the golden channels to pin down the properties of the Higgs boson in the prospective Higgs factories exemplified by CEPC. The projected accuracy of the corresponding cross section measurement is about per cent level at CEPC. In this work, we investigate both O(α) weak correction and the O(ααs) mixed electroweak-QCD corrections for this channel, appropriately taking into account the effect of finite Z0 width. The μ+μ- invariant mass spectrum is also predicted. The mixed electroweak-QCD correction turns out to reach 1.5% of the Born-order result, and thereby must be included in future confrontation with the data. We also observe that, after including higher-order corrections, the simplified prediction for the integrated cross section employing the narrow-width-approximation may deviate from our full result by a few per cents.
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Wen Chen, Feng Feng, Yu Jia and Wen-Long Sang. Mixed electroweak-QCD corrections to e+e-μ+μ-H at CEPC with finite-width effect[J]. Chinese Physics C, 2019, 43(1): 013108. doi: 10.1088/1674-1137/43/1/013108
Wen Chen, Feng Feng, Yu Jia and Wen-Long Sang. Mixed electroweak-QCD corrections to e+e-μ+μ-H at CEPC with finite-width effect[J]. Chinese Physics C, 2019, 43(1): 013108.  doi: 10.1088/1674-1137/43/1/013108 shu
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Received: 2018-04-11
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    The work of W. C. and Y. J. is Supported in part by the National Natural Science Foundation of China (11475188, 1187051300, 11261130311) (CRC110 by DGF and NSFC). The work of F. F. is Supported by the National Natural Science Foundation of China (11505285, 11875318) and by the Fundamental Research Funds for the Central Universities. W.-L. S. is Supported by the National Natural Science Foundation of China (11605144)

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Mixed electroweak-QCD corrections to e+e-μ+μ-H at CEPC with finite-width effect

  • 1. Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China;
  • 2. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;
  • 3. Department of Physics, University of Alberta, Canada;
  • 4. China University of Mining and Technology, Beijing 100083, China;
  • 5. School of Physical Science and Technology, Southwest University, Chongqing 400700, China
Fund Project:  The work of W. C. and Y. J. is Supported in part by the National Natural Science Foundation of China (11475188, 1187051300, 11261130311) (CRC110 by DGF and NSFC). The work of F. F. is Supported by the National Natural Science Foundation of China (11505285, 11875318) and by the Fundamental Research Funds for the Central Universities. W.-L. S. is Supported by the National Natural Science Foundation of China (11605144)

Abstract: The associated production of Higgs boson with a muon pair, e+e-μ+μ-H, is one of the golden channels to pin down the properties of the Higgs boson in the prospective Higgs factories exemplified by CEPC. The projected accuracy of the corresponding cross section measurement is about per cent level at CEPC. In this work, we investigate both O(α) weak correction and the O(ααs) mixed electroweak-QCD corrections for this channel, appropriately taking into account the effect of finite Z0 width. The μ+μ- invariant mass spectrum is also predicted. The mixed electroweak-QCD correction turns out to reach 1.5% of the Born-order result, and thereby must be included in future confrontation with the data. We also observe that, after including higher-order corrections, the simplified prediction for the integrated cross section employing the narrow-width-approximation may deviate from our full result by a few per cents.

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