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Enhanced Higgs pair production from higgsino decay at the HL-LHC
/ Dai, Jianpeng (Beijing, Inst. Theor. Phys. ; Beijing, GUCAS) ; Liu, Tao (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Wang, Daohan (Beijing, Inst. Theor. Phys. ; Beijing, GUCAS) ; Yang, Jin Min (Beijing, Inst. Theor. Phys. ; Beijing, GUCAS)
The scenario of multi-sector SUSY breaking predicts pseudo-goldstinos which are not absorbed by the gravitino and their mass can be as low as ${{\cal O} (0.1)}$ GeV. Since the interactions of pseudo-goldstinos are not so weak as gravitino, a produced higgsino can decay to a pseudo-goldstino plus a Higgs boson insider the detector at the LHC, and thus the higgsino pair production can lead to the signal of Higgs pair plus missing energy. [...]
arXiv:2202.03258.-
2022-10 - 23 p.
- Published in : Nucl. Phys. B 983 (2022) 115912
Fulltext: PDF;
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Nature of $X(6900)$ and its production mechanism at LHCb
/ Gong, Chang (Beijing, Inst. High Energy Phys. ; TPCSF, Beijing) ; Du, Meng-Chuan (Beijing, Inst. High Energy Phys. ; TPCSF, Beijing ; Beijing, GUCAS) ; Zhao, Qiang (TPCSF, Beijing ; Beijing, GUCAS ; SICQEA, Changsha) ; Zhong, Xian-Hui (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Zhou, Bin (Beijing, Inst. High Energy Phys. ; TPCSF, Beijing)
We show that the Pomeron exchanges play a unique role in vector charmonium scatterings. Such a mechanism can provide a natural explanation for the nontrivial structures in the di-$J/\psi$ spectrum observed by the LHCb Collaboration. [...]
arXiv:2011.11374.-
2022-01-10 - 6 p.
- Published in : Phys. Lett. B 824 (2022) 136794
Fulltext: 2011.11374 - PDF; 1-s2.0-S0370269321007346-main - PDF;
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Jet-Origin Identification and Its Application at an Electron-Positron Higgs Factory
/ Liang, Hao (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Zhu, Yongfeng (Peking U., SKLNPT) ; Wang, Yuexin (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS ; CCAST World Lab, Beijing) ; Che, Yuzhi (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Zhou, Chen (Peking U., SKLNPT) ; Qu, Huilin (CERN) ; Ruan, Manqi (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS)
To enhance the scientific discovery power of high-energy collider experiments, we propose and realize the concept of jet origin identification that categorizes jets into 5 quark species $(b,c,s,u,d)$, 5 anti-quarks $(\bar{b},\bar{c},\bar{s},\bar{u},\bar{d})$, and the gluon. Using state-of-the-art algorithms and simulated $\nu\bar{\nu}H, H\rightarrow jj$ events at 240 GeV center-of-mass energy at the electron-positron Higgs factory, the jet origin identification simultaneously reaches jet flavor tagging efficiencies ranging from 67% to 92% for bottom, charm, and strange quarks, and jet charge flip rates of 7% to 24% for all quark species. [...]
arXiv:2310.03440.-
2024-05-31 - 8 p.
- Published in : Phys. Rev. Lett. 132 (2024) 221802
Fulltext: 2310.03440 - PDF; Publication - PDF;
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Nuclear charge radii of germanium isotopes around $N$ = 40
/ Wang, S.J. (Peking U., SKLNPT) ; Kanellakopoulos, A. (Leuven U.) ; Yang, X.F. (Peking U., SKLNPT ; Leuven U.) ; Bai, S.W. (Peking U., SKLNPT) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Cheal, B. (Manchester U.) ; Devlin, C.S. (Manchester U.) ; Garcia Ruiz, R.F. (MIT ; CERN) et al.
Collinear laser spectroscopy measurements were performed on $^{68-74}$Ge isotopes ($Z = 32$) at ISOLDE-CERN, by probing the $4s^2 4p^2 \, ^3\!P_1 \rightarrow 4s^2 4p 5s \, ^3\!P_1^o$ atomic transition (269~nm) of germanium. Nuclear charge radii are determined via the measured isotope shifts, revealing a larger local variation than the neighboring isotopic chains. [...]
arXiv:2404.06046.-
2024-07-11 - 6 p.
Fulltext: Publication - PDF; 2404.06046 - PDF;
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Layout and Performance of HPK Prototype LGAD Sensors for the High-Granularity Timing Detector
/ Yang, X. (CUST, SKLPDE) ; Alderweireldt, S. (CERN) ; Atanov, N. (BITP, Kiev ; Dubna, JINR) ; Ayoub, M.K. (Beijing, Inst. High Energy Phys.) ; Barreiro Guimarães da Costa, J. (Beijing, Inst. High Energy Phys.) ; Castillo García, L. (Barcelona, IFAE) ; Chen, H. (CUST, SKLPDE) ; Christie, S. (UC, Santa Cruz, Inst. Part. Phys.) ; Cindro, V. (Stefan Inst., Ljubljana) ; Cui, H. (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) et al.
The High-Granularity Timing Detector is a detector proposed for the ATLAS Phase II upgrade. The detector, based on the Low-Gain Avalanche Detector (LGAD) technology will cover the pseudo-rapidity region of $2.4<|\eta|<4.0$ with two end caps on each side and a total area of 6.4 $m^2$. [...]
arXiv:2003.14071.-
2020-11-11 - 17 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 980 (2020) 164379
Fulltext: PDF;
In : 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD), Hiroshima, Japan, 14 - 18 Dec 2019, pp.164379
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Fully heavy tetraquark states and their evidences in LHC observations
/ liu, Ming-Sheng (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Liu, Feng-Xiao (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Zhong, Xian-Hui (Hunan Normal U. ; Hunan, LDQSQC ; SICQEA, Changsha) ; Zhao, Qiang (Beijing, Inst. High Energy Phys. ; North China Electric Power U., Beijing ; Beijing, GUCAS ; SICQEA, Changsha)
Stimulated by the exciting progress on the observations of the fully-charmed tetraquarks at LHC, we carry out a combined analysis of the mass spectra and fall-apart decays of the $1S$-, $2S$-, and $1P$-wave $cc\bar{c}\bar{c}$ states in a nonrelativistic quark model (NRQM). It is found that the $X(6600)$ structure observed in the di-$J/\psi$ invariant mass spectrum can be explained by the $1S$-wave state $T_{(4c)0^{++}}(6550)$. [...]
arXiv:2006.11952.-
2024-04-01 - 14 p.
- Published in : Phys. Rev. D 109 (2024) 076017
Fulltext: 2006.11952 - PDF; Publication - PDF;
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One-to-one correspondence reconstruction at the electron-positron Higgs factory
/ Wang, Yuexin (Beijing, Inst. High Energy Phys.) ; Liang, Hao (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS ; Vanderbilt U.) ; Zhu, Yongfeng (Peking U., SKLNPT) ; Che, Yuzhi (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Xia, Xin (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Qu, Huilin (CERN) ; Zhou, Chen (Peking U., SKLNPT) ; Zhuang, Xuai (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Ruan, Manqi (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS)
We propose one-to-one correspondence reconstruction for electron-positron Higgs factories. [...]
arXiv:2411.06939.
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Beam test results of NDL Low Gain Avalanche Detectors (LGAD)
/ Xiao, S. (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Alderweireldt, S. (CERN) ; Ali, S. (Taiwan, Inst. Phys.) ; Allaire, C. (CERN) ; Agapopoulou, C. (Orsay, LAL) ; Atanov, N. (Dubna, JINR) ; Ayoub, M.K. (Beijing, Inst. High Energy Phys.) ; Barone, G. (Brookhaven) ; Benchekroun, D. (Casablanca U.) ; Buzatu, A. (Taiwan, Inst. Phys.) et al.
To meet the timing resolution requirement of up-coming High Luminosity LHC (HL-LHC), a new detector based on the Low-Gain Avalanche Detector(LGAD), High-Granularity Timing Detector (HGTD), is under intensive research in ATLAS. Two types of IHEP-NDL LGADs(BV60 and BV170) for this update is being developed by Institute of High Energy Physics (IHEP) of Chinese Academic of Sciences (CAS) cooperated with Novel Device Laboratory (NDL) of Beijing Normal University and they are now under detailed study. [...]
arXiv:2005.07323.-
2021-02-11 - 16 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 989 (2021) 164956
Fulltext: PDF;
In : 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD), Hiroshima, Japan, 14 - 18 Dec 2019, pp.164956
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