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31 results on '"Xiao, Rui-Qing"'

1. UV Completion of Neutral Triple Gauge Couplings

Author

Ellis, John, He, Hong-Jian, Xiao, Rui-Qing, Zeng, Shi-Ping, and Zheng, Jiaming

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, High Energy Physics - Theory
Abstract

Neutral triple gauge couplings (nTGCs) are manifestation of new physics beyond the Standard Model (SM), as they are absent in the SM and are first generated by dimension-8 operators in the SM Effective Field Theory (SMEFT). We study the UV completion of nTGCs in a renormalizable model with vector-like heavy fermions. We compute the one-loop heavy fermion contributions to nTGC vertices by matching them to dimension-8 operators in the low energy limit. Such fermion loops contain either heavy fermions only or mixture of heavy fermions with light SM fermions. We find that their contributions can induce dimension-8 nTGC effective operators containing two SM Higgs-doublet fields, which are formulated with a complete set of 7 dimension-8 operators generating off-shell CP-even nTGCs. We present the results in terms of SMEFT coefficients and in terms of nTGC vertices (form factors) with two on-shell gauge bosons. In the heavy-light mixing case there appear terms that cannot be accommodated by conventional parametrizations of form factors due to extra logarithmic corrections. We further discuss the implications for probing such UV dynamics via nTGCs at the high energy colliders.

Published
2024

2. Probing Neutral Triple Gauge Couplings via $\boldsymbol{Z\gamma\,(\ell^+\ell^-\gamma)}$ Production at $\boldsymbol{e^+e^-}$ Colliders

Author

Liu, Danning, Xiao, Rui-Qing, Li, Shu, Ellis, John, He, Hong-Jian, and Yuan, Rui

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Neutral triple gauge couplings (nTGCs) are absent in the Standard Model (SM) and at the dimension-6 level in the Standard Model Effective Field Theory (SMEFT), arising first from dimension-8 operators. As such, they provide a unique window for probing new physics beyond the SM. These dimension-8 operators can be mapped to nTGC form factors whose structure is consistent with the spontaneously-broken electroweak gauge symmetry of the SM. In this work, we study the probes of nTGCs in the reaction $e^+e^-\to Z\gamma$ with $Z\to\ell^+\ell^-\,(\ell =e,\mu)$ at an $e^+e^-$ collider. We perform a detector-level simulation and analysis of this reaction at the Circular Electron Positron Collider (CEPC) with collision energy $\sqrt{s} = 240$ GeV and an integrated luminosity of 20 ab$^{-1}$. We present the sensitivity limits on probing the new physics scales of dimension-8 nTGC operators via measurements of the corresponding nTGC form factors., Comment: Frontiers of Physics (in Press), 22 pages, 10 Figs and 10 Tables

Published
2024

3. Probing Neutral Triple Gauge Couplings with $Z^* \gamma\, (\nu \bar \nu \gamma)$ Production at Hadron Colliders

Author

Ellis, John, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We study probes of neutral triple gauge couplings (nTGCs) via $Z^*\gamma$ production followed by off-shell decays $Z^*\to\nu\bar{\nu}$ at the LHC and future $pp$ colliders, including both CP-conserving (CPC) and CP-violating (CPV) couplings. We present the dimension-8 SMEFT operators contributing to nTGCs and derive the correct form factor formulation for the off-shell vertices $Z^*\gamma V^*$ ($V=Z,\gamma$) by matching them with the dimension-8 SMEFT operators. Our analysis includes new contributions enhanced by the large off-shell momentum of $Z^*$, beyond those of the conventional $Z\gamma V^*$ vertices with on-shell $Z\gamma$. We analyze the sensitivity reaches for probing the CPC/CPV nTGC form factors and the new physics scales of the dimension-8 nTGC operators at the LHC and future 100TeV $pp$ colliders. We compare our new predictions with the existing LHC measurements of CPC nTGCs in the $\nu\bar\nu\gamma$ channel and demonstrate the importance of our new method., Comment: 25 pages (including supplemental material), only minor refinements, to match the version of PRD(letter)

Published
2023
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4. The hMSSM with a Light Gaugino/Higgsino Sector: Implications for Collider and Astroparticle Physics

Author

Arcadi, Giorgio, Djouadi, Abdelhak, He, Hong-Jian, Kneur, Jean-Loic, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology
Abstract

The hMSSM is a special parameterization of the minimal supersymmetric extension of the Standard Model (MSSM) in which the mass of the lightest Higgs boson is automatically set to the LHC measured value, $M_h\!\!=\!\! 125$\,GeV, by adjusting the supersymmetric particle spectrum such that it provides the required amount of radiative corrections to the Higgs boson masses.\ The latter spectrum was in general assumed to be very heavy, as indicated by the present exclusion limits of the LHC, not to affect the phenomenology of the Higgs sector.\ In this work, we investigate the impact on the hMSSM by a light gaugino and higgsino sector, that is allowed by the present LHC data.\ In particular, we discuss the radiative corrections due to charginos and neutralinos to the Higgs boson masses and couplings and show that an hMSSM can still be realized in this context.\ We first describe how this scenario is implemented in the package SuSpect that generates the MSSM Higgs and supersymmetric spectra.\ We then analyze the possible impact of Higgs boson decays into these new states, as well as the reverse cascade channels with Higgs bosons in the final states, for the constraints on the MSSM Higgs sector at the LHC.\ We further explore the cosmological constraints on the hMSSM with a light gaugino--higgsino spectrum.\ We analyze the relic abundance of the lightest neutralino as a candidate of the dark matter in the Universe and the constraints on its mass and couplings by the present and future astroparticle physics experiments., Comment: 57 pages, 21 figures. Version to appear in JHEP

Published
2022
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5. Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders

Author

Ellis, John, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We study probes of neutral triple gauge couplings (nTGCs) at the LHC and the proposed 100TeV $pp$ colliders, and compare their sensitivity reaches with those of the proposed $e^+ e^-$ colliders. The nTGCs provide a unique window to the new physics beyond the Standard Model (SM) because they can arise from SM effective field theory (SMEFT) operators that respect the full electroweak gauge group $SU(2)_L\otimes U(1)_Y$ of the SM only at the level of dimension-8 or higher. We derive the neutral triple gauge vertices (nTGVs) generated by these dimension-8 operators in the broken phase and map them onto a newly generalized form factor formulation, which takes into account only the residual U(1)$_{\rm{em}}$ gauge symmetry. Using this mapping, we derive new relations between the form factors that guarantee a truly consistent form factor formulation of the nTGVs and remove large unphysical energy-dependent terms. We then analyze the sensitivity reaches of the LHC and future 100TeV hadron colliders for probing the nTGCs via both the dimension-8 nTGC operators and the corresponding nTGC form factors in the reactions $ pp(q\bar{q})\to Z\gamma$ with $Z\to\ell^+\ell^-,\nu\bar{\nu}$. We compare their sensitivities with the existing LHC measurements of nTGCs and with those of the high-energy $e^+e^-$ colliders. In general, we find that the prospective LHC sensitivities are comparable to those of an $e^+ e^-$ collider with center-of-mass energy $\leq 1$TeV, whereas an $e^+ e^-$ collider with center-of-mass energy $(3 - 5)$TeV would have greater sensitivities, and a 100TeV $pp$ collider could provide the most sensitive probes of the nTGCs., Comment: 57 pages, 22 Figs + Tables. PRD Version [selected as Editors' Suggestion], only minor refinements, references added

Published
2022
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6. Probing New Physics in Dimension-8 Neutral Gauge Couplings at $e^+e^-$ Colliders

Author

Ellis, John, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Neutral triple gauge couplings (nTGCs) are absent in the standard model effective theory up to dimension-6 operators, but could arise from dimension-8 effective operators. In this work, we study the pure gauge operators of dimension-8 that contribute to nTGCs and are independent of the dimension-8 operator involving the Higgs doublet. We show that the pure gauge operators generate both $Z\gamma Z^*$ and $Z\gamma\gamma^*$ vertices with rapid energy dependence $\propto E^5$, which can be probed sensitively via the reaction $e^+e^- \to Z\gamma$. We demonstrate that measuring the nTGCs via the reaction $e^+e^- \to Z\gamma$ followed by $Z \to q\bar{q}$ decays can probe the new physics scales of dimension-8 pure gauge operators up to the range $(1-5)$TeV at the CEPC, FCC-ee and ILC colliders with $\sqrt{s}=(0.25-1)$TeV, and up to the range $(10-16)$TeV at CLIC with $\sqrt{s}=(3-5)$TeV, assuming in each case an integrated luminosity of 5/ab. We compare these sensitivities with the corresponding probes of the dimension-8 nTGC operators involving Higgs doublets and the dimension-8 fermionic contact operators that contribute to the $e^+e^-Z\gamma$ vertex., Comment: 43pp, 9 Figs (32 plots) and 4 Tables. v4: refined Fig.9 by adding results of 5/ab integrated luminosity. v3: Only minor refinements to match online version in Science China, selected as "Editor's Focus" and "Cover Article"

Published
2020
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8. Probing the Scale of New Physics in the $ZZ\gamma$ Coupling at $e^+e^-$ Colliders

Author

Ellis, John, Ge, Shao-Feng, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

The $ZZ\gamma$ triple neutral gauge couplings are absent in the Standard Model (SM) at the tree level. They receive no contributions from dimension-6 effective operators, but can arise from effective operators of dimension-8. We study the scale of new physics associated with such dimension-8 operators that can be probed by measuring the reaction $e^+e^-\to Z\gamma$, followed by $Z \to \ell\bar{\ell},\nu\bar{\nu}$ decays, at future $e^+e^-$ colliders including the ILC, CEPC, FCC-ee and CLIC. We demonstrate how angular distributions of the final state mono-photon and leptons can play a key role in suppressing SM backgrounds. We further show that using electron/positron beam polarizations can significantly improve the signal sensitivities. We find that the dimension-8 new physics scale can be probed up to the multi-TeV region at such lepton colliders., Comment: Final Journal Version, 53 pages [12 Figs (30 plots), 7 Tables]. Extended version, all conclusions and results unchanged, clarifications & references added

Published
2019
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10. LHC Search of New Higgs Boson via Resonant Di-Higgs Production with Decays into 4W

Author

Ren, Jing, Xiao, Rui-Qing, Zhou, Maosen, Fang, Yaquan, He, Hong-Jian, and Yao, Weiming

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Searching for new Higgs particle beyond the observed light Higgs boson h(125GeV) will unambiguously point to new physics beyond the standard model. We study the resonant production of a CP-even heavy Higgs state $H^0$ in the di-Higgs channel via, $gg\to H^0\to h^0h^0\to WW^*WW^*$, at the LHC Run-2 and the high luminosity LHC (HL-LHC). We analyze two types of the $4W$ decay modes, one with the same-sign di-leptons ($4W\to\ell^\pm\nu\ell^\pm\nu 4q$) and the other with tri-leptons ($4W\to\ell^\pm\nu\ell^\mp\nu\ell^\pm\nu 2q$). We perform a full simulation for the signals and backgrounds, and estimate the discovery potential of the heavy Higgs state at the LHC Run-2 and the HL-LHC, in the context of generical two-Higgs-doublet models (2HDM). We determine the viable parameter space of the 2HDM as allowed by the theoretical constraints and the current experimental limits. We systematically analyze the allowed parameter space of the 2HDM which can be effectively probed by the heavy Higgs searches of the LHC, and further compare this with the viable parameter region under the current theoretical and experimental bounds., Comment: v3: JHEP published version, 34pp, 10 Figs(36 plots) and 9 Tables. Only minor typos fixed, references added. v2: JHEP version. All results and conclusions un-changed, discussions and references added. (This update is much delayed due to author's traveling and flu.)

Published
2017
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11. Testing Higgs Coupling Precision and New Physics Scales at Lepton Colliders

Author

Ge, Shao-Feng, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

The next-generation lepton colliders, such as CEPC, FCC-ee, and ILC will make precision measurement of the Higgs boson properties. We first extract the Higgs coupling precision from Higgs observables at CEPC to illustrate the potential of future lepton colliders. Depending on the related event rates, the precision can reach percentage level for most couplings. Then, we try to estimate the new physics scales that can be indirectly probed with Higgs and electroweak precision observables. The Higgs observables, together with the existing electroweak precision observables, can probe new physics up to 10TeV (40TeV for the gluon-related operator $\mathcal O_g$) at 95% C.L. Including the $Z/W$ mass measurements and $Z$-pole observables at CEPC further pushes the limit up to 35TeV. Although $Z$-pole running is originally for the purpose of machine calibration, it can be as important as the Higgs observables for probing the new physics scales indirectly. The indirect probe of new physics scales at lepton colliders can mainly cover the energy range to be explored by the following hadron colliders of pp (50-100TeV), such as SPPC and FCC-hh., Comment: 15pp. Presentation at IAS Program on HEP (Jan-2016). -- Our updated analyses and fits appeared in journal paper JHEP 1610 (2016) 007 [arXiv:1603.03385]

Published
2016
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12. LHC search of new Higgs boson via resonant di-Higgs production with decays into 4W

Author

Ren, Jing, Xiao, Rui-Qing, Zhou, Maosen, Fang, Yaquan, He, Hong-Jian, and Yao, Weiming

Subjects
Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

Searching for new Higgs particle beyond the observed light Higgs boson h0(125 GeV) will unambiguously point to new physics beyond the standard model. We study the resonant production of a CP-even heavy Higgs state H0 in the di-Higgs channel, gg → H0 → h0h0 → WW*WW*, at the LHC Run-2 and the high luminosity LHC (HL-LHC). We analyze two types of the 4W decay modes, one with the same-sign di-leptons (4W → ℓ±νℓ±ν4q) and the other with tri-leptons (4W → ℓ±νℓ∓νℓ±ν2q). We perform a full simulation for the signals and backgrounds, and estimate the discovery potential of the heavy Higgs state at the LHC Run-2 and the HL-LHC, in the context of generic two-Higgs-doublet models (2HDM). We determine the viable parameter space of the 2HDM as allowed by the theoretical constraints and the current experimental limits. We systematically analyze the allowed parameter space of the 2HDM which can be effectively probed by the heavy Higgs searches of the LHC, and further compare this with the viable parameter region under the current theoretical and experimental bounds.

Published
2018

14. Probing New Physics Scales from Higgs and Electroweak Observables at $e^+ e^-$ Higgs Factory

Author

Ge, Shao-Feng, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

New physics beyond the standard model (SM) can be model-independently formulated via dimension-6 effective operators, whose coefficients (cutoffs) characterize the scales of new physics. We study the probe of new physics scales from the electroweak precision observables (EWPO) and the Higgs observables (HO) at the future $e^+e^-$ Higgs factory (such as CEPC). To optimize constraints of new physics from all available observables, we establish a scheme-independent approach. With this formulation, we treat the SM electroweak parameters and the coefficients of dimension-6 operators on equal footing, which can be fitted simultaneously by the same $\chi^2$ function. As deviations from the SM are generally small, we can expand the new physics parameters up to linear order and perform an analytical $\chi^2$ fit to derive the potential reach of the new physics scales. We find that the HO from both Higgs produnction and decay rates can probe the new physics scales up to 10TeV (and to 44TeV for the case of gluon-involved operator $\mathcal{O}_g$), and the new physics scales of Yukawa-type operators can be probed by the precision Higgs coupling measurements up to (13-25)TeV. Further including the EWPO can push the limit up to 35TeV. From this prospect, we demonstrate that the EWPO measured in the early phase of a Higgs factory can be as important as the Higgs observables. These indirect probes of new physics scales at the Higgs factory can mainly cover the energy range to be directly explored by the next generation hadron colliders of pp(50-100TeV), such as the SPPC and FCC-hh., Comment: JHEP Final Version, 43 pages, 10 Tables, 6 Figs, using jheppub.sty format, only minor refinements

Published
2016
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18. The hMSSM with a Light Gaugino/Higgsino Sector:Implications for Collider and Astroparticle Physics

Author

Arcadi, Giorgio, Djouadi, Abdelhak, He, Hong-Jian, Kneur, Jean-Loic, Xiao, Rui-Qing, and HEP, INSPIRE

Subjects
interpretation of experiments: CERN LHC Coll, Higgs particle: decay, dark matter: relic density, minimal supersymmetric standard model, parametrization, chargino, supersymmetry: minimal, cascade, [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Higgs particle: mass, neutralino, radiative correction, sparticle: spectrum, Higgsino, numerical calculations
Abstract

The hMSSM is a special parameterization of the minimal supersymmetric extension of the Standard Model (MSSM) in which the mass of the lightest Higgs boson is automatically set to the LHC measured value, $M_h\!\!=\!\! 125$ GeV, by adjusting the supersymmetric particle spectrum such that it provides the required amount of radiative corrections to the Higgs boson masses. The latter spectrum was in general assumed to be very heavy, as indicated by the present exclusion limits of the LHC, not to affect the phenomenology of the Higgs sector. In this work, we investigate the impact on the hMSSM by a light gaugino and higgsino sector, that is allowed by the present LHC data. In particular, we discuss the radiative corrections due to charginos and neutralinos to the Higgs boson masses and couplings and show that an hMSSM can still be realized in this context. We first describe how this scenario is implemented in the package SuSpect that generates the MSSM Higgs and supersymmetric spectra. We then analyze the possible impact of Higgs boson decays into these new states, as well as the reverse cascade channels with Higgs bosons in the final states, for the constraints on the MSSM Higgs sector at the LHC. We further explore the cosmological constraints on the hMSSM with a light gaugino--higgsino spectrum. We analyze the relic abundance of the lightest neutralino as a candidate of the dark matter in the Universe and the constraints on its mass and couplings by the present and future astroparticle physics experiments.

Published
2022

20. Probing the scale of new physics in the ZZγ coupling at e+e− colliders The work of JE was supported in part by United Kingdom STFC Grant ST/P000258/1, in part by the Estonian Research Council via a Mobilitas Pluss grant, and in part by the TDLI distinguished visiting fellow programme. The work of HJH and RQX was supported in part by the National NSF of China (11675086, 11835005). HJH is also supported in part by the CAS Center for Excellence in Particle Physics (CCEPP), by the National Key R&D Program of China ( 2017YFA0402204), by the Shanghai Laboratory for Particle Physics and Cosmology (11DZ2260700), and by the Office of Science and Technology, Shanghai Municipal Government (16DZ2260200)

Author

Ellis, John, Ge, Shao-Feng, He, Hong-Jian, and Xiao, Rui-Qing

Subjects
Physics::Accelerator Physics, High Energy Physics::Experiment, Computer Science::Databases
Abstract

The triple neutral gauge couplings are absent in the Standard Model (SM) at the tree level. They receive no contributions from dimension-6 effective operators, but can arise from effective operators of dimension-8. We study the scale of new physics associated with such dimension-8 operators that can be probed by measuring the reaction followed by decays, at future colliders including the CEPC, FCC-ee, ILC and CLIC. We demonstrate how angular distributions of the final-state mono-photon and leptons can play a key rôle in suppressing SM backgrounds. We further demonstrate that using electron/positron beam polarizations can significantly improve the signal sensitivities. We find that the dimension-8 new physics scale can be probed up to the multi-TeV region at such lepton colliders.

Published
2020

22. Probing new physics in dimension-8 neutral gauge couplings at e+e− colliders.

Author

Ellis, John, He, Hong-Jian, and Xiao, Rui-Qing

Abstract

Neutral triple gauge couplings (nTGCs) are absent in the standard model effective theory up to dimension-6 operators, but could arise from dimension-8 effective operators. In this work, we study the pure gauge operators of dimension-8 that contribute to nTGCs and are independent of the dimension-8 operator involving the Higgs doublet. We show that the pure gauge operators generate both ZγZ* and Zγγ* vertices with rapid energy dependence ∝ E5, which can be probed sensitively via the reaction e+e− → Zγ. We demonstrate that measuring the nTGCs via the reaction e+e− → Zγ followed by Z → q q ¯ decays can probe the new physics scales of dimension-8 pure gauge operators up to the range (1-5) TeV at the CEPC, FCC-ee and ILC colliders with s = (0.25 − 1) TeV, and up to the range (10–16) TeV at CLIC with s = (3 − 5) TeV, assuming in each case an integrated luminosity of 5 ab−1. We compare these sensitivities with the corresponding probes of the dimension-8 nTGC operators involving Higgs doublets and the dimension-8 fermionic contact operators that contribute to the e+e−Zγ vertex. [ABSTRACT FROM AUTHOR]

Published
2021
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29. CEPC Conceptual Design Report: Volume 2 - Physics & Detector

Author

Guimarães Da Costa, João Barreiro, Gao, Yuanning, Jin, Shan, Qian, Jianming, Tully, Christopher G., Young, Charles, Wang, Lian-Tao, Ruan, Manqi, Zhu, Hongbo, Dong, Mingyi, Ouyang, Qun, Wu, Zhigang, Deng, Zhi, Li, Yulan, Qi, Huirong, Wang, Meng, Fu, Chengdong, Yao, Wei-Ming, Grancagnolo, Franco, Liu, Jianbei, Hu, Tao, Yang, Haijun, Bedeschi, Franco, Ferrari, Roberto, Zhao, Wei, Zhu, Zian, Giacomelli, Paolo, Li, Liang, Li, Fei, Liu, Zhenan, Zhu, Kejun, Hou, Suen, Bozovic Jelisavcic, Ivanka, Li, Gang, Fang, Yaquan, Li, Qiang, Boonekamp, Maarten, Liang, Zhijun, Piccinini, Fulvio, Shi, Xin, Abbrescia, Marcello, Ahmad, Muhammad, Ai, Xiaocong, Albergo, Sebastiano, Aleem, Muhammad Abid, Alexeev, Maxim, Aliev, Malik, Altmannshofer, Wolfgang, Alves, Fábio, An, Fenfen, An, Guangpeng, An, Haipeng, An, Qi, An, Rui, Andreazza, Attilio, Anduze, Marc, Antonello, Massimiliano, Garcia Pascual, Juan Antonio, Antusch, Stefan, Arhrib, Abdesslam, Arkani-Hamed, Nima, Arndt, Kirk, Azzi, Patrizia, Azzurri, Paolo, Palmer, Robert B., Bai, Bowen, Bai, Sha, Bai, Yang, Bai, Yu, Balagura, Vladislav, Balossino, Ilaria, Ban, Yong, Barger, Vernon, Barklow, Timothy, Bartalini, Paolo, Becattini, Francesco, Bellagamba, Lorenzo, Belloni, Alberto, Bencivenni, Giovanni, Berg, J. Scott, Bernius, Catrin, Bertani, Monica, Bertella, Claudia, Bertucci, Michele, Bi, Xiaojun, Bi, Yuanjie, Bian, Ligong, Bian, Tianjian, Bianchi, Fabrizio, Bigi, Ikaros I., Biglietti, Michela, Bignami, Andrea, Bilei, Gianmario, Borgonovi, Lisa, Bortoletto, Daniela, Bortone, Alberto, Boscherini, Davide, Bosotti, Angelo, Boudry, Vincent, Braibant, Sylvie, Bramante, Joseph, Branchini, Paolo, Brient, Jean-Claude, Caccia, Massimo, Cai, Chengfeng, Cai, Hao, Cai, Wenyong, Cai, Xiao, Cai, Yiming, Cai, Yuchen, Cai, Yunhai, Cai, Zhiqiang, Cano Bret, Marc, Cao, Bo, Cao, Dewen, Cao, Jianshe, Cao, Junjie, Cao, Qing-Hong, Carloni Calame, Carlo Michel, Casanova, Raimon, Cavasinni, Vincenzo, Chai, Junying, Chai, Weiping, Chang, Ningbo, Chang, Qin, Chang, Spencer, Chang, We-Fu, Chang, Xuejun, Chang, Yuan-Hann, Chekanov, Sergei, Chen, Bin, Chen, Chunhui, Chen, Fusan, Chen, Gang, Chen, Guoming, Chen, Huan, Chen, Huirun, Chen, Lei, Chen, Liejian, Chen, Mingjun, Chen, Mingshui, Chen, Nian, Chen, Ning, Chen, Shanhong, Chen, Shanzhen, Chen, Shao-Long, Chen, Shaomin, Chen, Shenjian, Chen, Shi, Chen, Wei, Chen, Wen, Chen, Xin, Chen, Xun, Chen, Xurong, Chen, Ye, Chen, Yu, Chen, Yuan, Chen, Yuanbai, Chen, Yukai, Chen, Zhenxing, Cheng, Hao, Cheng, Hsin-Chia, Cheng, Huajie, Cheng, Jian, Cheng, Shan, Cheng, Tongguang, Cheng, Weishuai, Cheong, Sanha, Chi, Yunlong, Chiarello, Gianluigi, Chiesa, Mauro, Chiu, Wen Han, Chou, Weiren, Chu, Chungming Paul, Chu, Ming-Chung, Chu, Xiaotong, Chu, Zhaolin, Chua, Chun-Khiang, Cibinetto, Gianluigi, Ciuchini, Marco, Cobal, Marina, Cochran, James, Coelho Lopes Sa, Rafael, Cossio, Fabio, Craig, Nathaniel, Cui, Han, Cui, Hanhua, Cui, Xiaohao, Cui, Zhaoyuan, Curtin, David, D Agnolo, Raffaele Tito, Dai, Jian-Ping, Dai, Jianping, Dai, Jin, Dai, Lei, Dai, Wei, Dai, Xuwen, Curtis, Stefania, Filippis, Nicola, Lucia, Erika, Mori, Francesca, Delgado, Antonio, Demarteau, Marcel, Deng, Changdong, Deng, Wei-Tian, Destefanis, Marco, Dev, P. S. Bhupal, Di Micco, Biagio, Ding, Ran, Ding, Xuefeng, Ding, Yadong, Da Rocha Rolo, Manuel Dionisio, Domenici, Danilo, Dong, Bingbing, Dong, Chongmin, Dong, Dong, Dong, Haiyi, Dong, Jianing, Dong, Jing, Dong, Lan, Dopke, Jens, Dordevic, Milos, Dos Santos Ramos, Tiago, Draper, Patrick, Drewes, Marco, Du, Mingxuan, Duan, Guang Hua, Eklund, Lars, Eno, Sarah, Erler, Jens, Essig, Rouven, Fan, Jiji, Fan, Shenghong, Fan, Wenjie, Fan, Xiangning, Fang, Shuangshi, Fano, Livio, Farilla, Addolarata, Farinelli, Riccardo, Faus-Golfe, Angeles, Fedderke, Michael A., Felici, Giulietto, Feng, Changqing, Feng, Cunfeng, Feng, Feng, Feng, Jianxin, Feng, Jun, Feng, Tai-Fu, Fischer, Oliver, Flores Castillo, Luis Roberto, Fontanesi, Elisa, Freitas, Ayres, Frotin, M., Frugiuele, Claudia, Fu, Jinyu, Fu, Qibin, Fu, Shinian, Fuchs, Elina, Fukuda, Shigeki, Gabrielli, Emidio, Gaido, Luciano, Gan, Pingping, Gao, Jie, Gao, Jun, Gao, Wu, Gao, Yanyan, Gao, Yu, Garzia, Isabella, Gaudio, Gabriella, Ge, Shao-Feng, Geng, Chao-Qiang, Geng, Huiping, Li-Sheng Geng, Gentile, Simonetta, Giraud, J., Giudice, Gian, Godbole, Rohini M., Gong, Dianjun, Gong, Guanghua, Gong, Hui, Gong, Li, Gong, Lingling, Gori, Stefania, Gou, Quanbu, Greco, Mario, Greco, Michela, Gribanov, Sergei S., Grinstein, Sebastian, Grondin, D., Gu, Jiayin, Gu, Limin, Gu, Pei-Hong, Guidi, Vincenzo, Guo, Fangyi, Guo, Jingyuan, Guo, Jun, Guo, Lei, Guo, Xin, Guo, Yuanyuan, Guo, Zhigang, Gupta, Ramesh, Han, Chengcheng, Han, Dejun, Han, Jinzhong, Han, Liangliang, Han, Ran, Han, Ruixiong, Han, Shuang, Han, Yanliang, Han, Yubo, Hang, Yanfeng, Hao, Jiankui, Hao, Xiqing, He, Dayong, He, Hong-Jian, He, Jibo, He, Jun, He, Min, He, Xiang, He, Xianke, He, Xiaogang, He, Yangle, He, Zhenqiang, Heinemeyer, Sven, Heng, Yuekun, Hong, Daojin, Hong, Jiangliu, Hong, Yang, Hor, Yuenkeung, Hostachy, J. -Y, Hou, Qingbo, Hou, Zhilong, Hsu, Shih-Chieh, Hu, Bitao, Hu, Jifeng, Hu, Jun, Hu, Shouyang, Hu, Shuyang, Hu, Yongcai, Hu, Yu, Hu, Zhen, Hu, Zhongjun, Huang, 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Yanting, Luo, Zhenhuan, Lyu, Kunfeng, Lyu, Xiaorui, Ma, Huizhou, Ma, Kai, Ma, Lianliang, Ma, Na, Ma, Qiang, Ma, Rui, Ma, Wen-Gan, Ma, Xiao, Ma, Xiaotian, Ma, Xinpeng, Ma, Yanling, Ma, Yanqing, Ma, Yongsheng, Ma, Yue, Ma, Zhongjian, Maggiora, Marco, Magniette, Frédéric, Malamud, Ernie, Mangano, Michelangelo, Mao, Lijun, Mao, Mingling, Mao, Yajun, Mao, Yanmin, Mao, Yanyan, Martin, Adam, Martinez Outschoorn, Verena Ingrid, Matsumoto, Shigeki, Mccullough, Matthew, Mcmahon, Steve, Meade, Patrick, Mele, Barbara, Mellado, Bruce, Men, Lingling, Meng, Cai, Meng, Fanbo, Mezzadri, Giulio, Mi, Zhenghui, Michelato, Paolo, Min, Tianjue, Ming, Lei, Mittal, Monika, Molson, James, Monaco, Laura, Montagna, Guido, Morello, Gianfranco, Moretti, Mauro, Mu, Zhihui, Nanni, Jérome, Neubert, Matthias, Nicrosini, Oreste, Nie, Changshan, Nikitin, Sergei, Ning, Feipeng, Ning, Guo-Zhu, Nishu, Nishu, Niu, Yazhou, Ojalvo, Isobel, Okunev, Ivan, Ospanov, Rustem, Pagani, Carlo, Paganis, Stathes, Panareo, Marco, 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Tsai, Yuhsin, Tsybychev, Dmitri, Tu, Yanjun, Tweedie, Brock, Unwin, James, Verducci, Monica, Vicini, Alessandro, Videau, Henri, Viehhauser, Georg, Vivarelli, Iacopo, Vossebeld, Joost, Vukasinovic, Natasa, Wan, Xia, Wang, Biao, Wang, Bin, Wang, Binlong, Wang, Bo, Wang, Chengtao, Wang, Chengwei, Wang, Chenliang, Wang, Dayong, Wang, Dou, Wang, Fei, Wang, Feng, Wang, Gang, Wang, Haijing, Wang, Haiyun, Wang, Hui, Wang, Jian, Wang, Jianchun, Wang, Jianli, Wang, Jianxiong, Wang, Jiawei, Wang, Jie, Wang, Jin, Wang, Jing, Wang, Jinwei, Wang, Ke, Wang, Kechen, Wang, Kunfu, Wang, Liangliang, Wang, Lijiao, Wang, Linlin, Wang, Longge, Wang, Lu, Wang, Meifen, Wang, Na, Wang, Pengcheng, Wang, Qun, Wang, Qunyao, Wang, Ran, Wang, Ren-Jie, Wang, Rongkun, Wang, Shaobo, Wang, Shaozhe, Wang, Shengchang, Wang, Shuzheng, Wang, Siguang, Wang, Tianhong, Wang, Tong, Wang, Wei, Wang, Weiping, Wang, Wenyu, Wang, Xi, Wang, Xiangjian, Wang, Xiangqi, Wang, Xiaolong, Wang, Xiaoning, Wang, Xiaoping, Wang, Xin, Wang, Xingze, Wang, Xiongfei, Wang, Yan, Wang, Yaqian, Wang, Yi, Wang, Yifang, Wang, Ying, Wang, Yiwei, Wang, Yong, Wang, Youkai, Wang, Yu, Wang, Yufeng, Wang, Yuhao, Wang, Zhaofeng, Wang, Zhigang, Wang, Zhipeng, Wang, Zhiyong, Wang, Zirui, Wang, Zixun, Wang, Zongyuan, Wei, Runing, Wei, Shujun, Wei, Wei, Wei, Xiaomin, Wei, Yuanyuan, Wei, Yuqian, Wen, Shuopin, Wen, Zhiwen, Willocq, Stephane, Witte, Holger, Wu, Jinfei, Wu, Juan, Wu, Kewei, Wu, Lei, Wu, Linghui, Wu, Mengqing, Wu, Peiwen, Wu, Tianya, Wu, Wenhuan, Wu, Xi, Wu, Xiao-Hong, Wu, Xing-Gang, Wu, Xu, Wu, Xueting, Wu, Ye, Wu, Yuwen, Wu, Zhi, Xia, Wenhao, Xiang, Dao, Xiang, Qian-Fei, Xianyu, Zhong-Zhi, Xiao, Bo-Wen, Xiao, Dengjie, Xiao, Ning, Xiao, Ouzheng, Xiao, Rui-Qing, Xiao, Yu, Xiao, Zhen-Jun, Xie, Ke-Pan, Xie, Xinhai, Xie, Yuehong, Xie, Yuguang, Xie, Zongtai, Xing, Qingzhi, Xing, Zhizhong, Xiu, Qinglei, Xu, Chang, Xu, Da, Xu, Fanrong, Xu, Guanglei, Xu, Guangzhi, Xu, Haocheng, Xu, Hongge, Xu, Hongliang, Xu, Hui, Xu, Ji, Xu, Nu, Xu, 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Zhao, Yu, Zhao, Yue, Zhao, Zhengguo, Zhao, Zhen-Xing, Zhao, Zhuo, Zheng, Bo, Zheng, Hongjuan, Zheng, Liang, Zheng, Ran, Zheng, Shuxin, Zheng, Taifan, Zheng, Xuxing, Zheng, Ya-Juan, Zheng, Yangheng, Zhi, Yu, Zhong, Bin, Zhong, Yiming, Zhou, Bing, Zhou, Hai-Qing, Zhou, Hang, Zhou, Jia, Zhou, Jianxin, Zhou, Jing, Zhou, Maosen, Zhou, Nan, Zhou, Ning, Zhou, Ningchuang, Zhou, Shiyu, Zhou, Shun, Zhou, Sihong, Zhou, Siyi, Zhou, Xiang, Zhou, Yang, Zhou, Yi, Zhou, Yu-Feng, Zhou, Zusheng, Zhu, Changhe, Zhu, Chengguang, Zhu, Chenzheng, Zhu, Dechong, Zhu, Hongyan, Zhu, Hua-Xing, Zhu, Jiamin, Zhu, Jiang, Zhu, Jingya, Zhu, Jingyu, Zhu, Junjie, Zhu, Kai, Zhu, Kun, Zhu, Li, Zhu, Ruilin, Zhu, Xianglei, Zhu, Xuezheng, Zhu, Yifan, Zhu, Yingshun, Zhu, Yongfeng, Zhuang, Xuai, Zong, Hongshi, Zou, Cong, Zou, Jiaheng, Zou, Ye, Zupan, Jure, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CEPC Study Group, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and HEP, INSPIRE

Subjects
detector: technology, Higgs particle: particle source, electron positron: storage ring, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], engineering, FOS: Physical sciences, threshold: production, electron positron: annihilation, B-factory, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], accelerator: technology, detector: design, Particle Physics - Phenomenology, new physics, hep-ex, Z0: decay, Higgs-factory, High Energy Physics::Phenomenology, Z0: particle source, hep-ph, electron positron: colliding beams, sensitivity, CEPC, High Energy Physics - Phenomenology, tau: particle source, 240 GeV-cms, vertex: primary, Higgs particle: electroproduction, charm: particle source, High Energy Physics::Experiment, proposed experiment, numerical calculations: Monte Carlo, Z0-factory, performance, Particle Physics - Experiment
Abstract

The Circular Electron Positron Collider (CEPC) is a large international scientific facility proposed by the Chinese particle physics community to explore the Higgs boson and provide critical tests of the underlying fundamental physics principles of the Standard Model that might reveal new physics. The CEPC, to be hosted in China in a circular underground tunnel of approximately 100 km in circumference, is designed to operate as a Higgs factory producing electron-positron collisions with a center-of-mass energy of 240 GeV. The collider will also operate at around 91.2 GeV, as a Z factory, and at the WW production threshold (around 160 GeV). The CEPC will produce close to one trillion Z bosons, 100 million W bosons and over one million Higgs bosons. The vast amount of bottom quarks, charm quarks and tau-leptons produced in the decays of the Z bosons also makes the CEPC an effective B-factory and tau-charm factory. The CEPC will have two interaction points where two large detectors will be located. This document is the second volume of the CEPC Conceptual Design Report (CDR). It presents the physics case for the CEPC, describes conceptual designs of possible detectors and their technological options, highlights the expected detector and physics performance, and discusses future plans for detector R&D and physics investigations. The final CEPC detectors will be proposed and built by international collaborations but they are likely to be composed of the detector technologies included in the conceptual designs described in this document. A separate volume, Volume I, recently released, describes the design of the CEPC accelerator complex, its associated civil engineering, and strategic alternative scenarios., 424 pages

31. HCV infection in voluntary donors and its influence on recruitment of donors in Chongqing area.

Author

Zhao SM, Jiang TL, Li RQ, Gao FX, Lu L, Zheng HQ, Hu J, Fan YH, Li B, Xiao RQ, and Yury K

Subjects
China epidemiology, Genotype, Hepacivirus isolation & purification, Hepatitis C transmission, Hepatitis C Antibodies blood, Humans, Incidence, Seroepidemiologic Studies, Blood Donors, Hepacivirus genetics, Hepatitis C epidemiology
Abstract

Blood donor recruitment models have changed from paid donors to employer-organized donors and to voluntary donors in China. Reports on the hepatitis C virus (HCV) infection among voluntary blood donors in China have been rarely found at present. The prevalence of anti-HCV and genotypes among the first-time voluntary blood donors was investigated in Chongqing area of China. A total of 13,620 serum samples were collected from the first-time voluntary blood donors in Chongqing, China. Anti-HCV antibody was tested by ELISA. The Core/E2 region of HCV RNA from HCV seropositive samples was amplified by RT-PCR for genotyping. The results indicated that the prevalence of anti-HCV averaged 0.49% (67/13,620), and the highest rate (0.86%) was obtained in the group aged 40 to 49. A higher prevalence was observed among the more educated donors, and metropolitan donors. The ratios of following genotypes 1b, 2a, 3a and 3b were 4 (18%), 5 (23%), 9 (41%) and 4 (18%) in all the 22 samples respectively. Genotype 3 (3a and 3b) was the predominant genotype. In conclusion, the prevalence of anti-HCV was low among the population of voluntary blood donors in Chonqing area. The genotyping results showed the possibility of presence of druggies among the voluntary blood donors. Therefore, more attention should be paid to exclude those high-risk persons from the volunteers.

Published
2008

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