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A search for bottom-type, vector-like quark pair production in a fully hadronic final state in proton-proton collisions at $\sqrt{s} =$ 13 TeV

The CMS collaboration
Phys.Rev.D 102 (2020) 112004, 2020.

Abstract (data abstract)
A search is described for the production of a pair of bottom-type vector-like quarks (VLQs), each decaying into a \PQb quark and either a Higgs or a \PZ boson. The analysis is based on data from proton-proton collisions at a 13\TeV center-of-mass energy recorded by the CMS experiment, corresponding to a total integrated luminosity of 137\fbinv. Since the predominant decay modes of the Higgs and \PZ bosons are to a pair of quarks, the analysis focuses on final states consisting of jets resulting from the six quarks produced in the events. Because the two jets produced in the decay of a highly boosted Higgs or \PZ boson might merge to form a single jet, three independent analyses are performed, categorized by the number of observed jets. No signal in excess of the expected background is observed, allowing lower limits to be set on the VLQ mass. The limits at 95\% confidence level are 1573\GeV in the case where the VLQ decays exclusively to a b quark and a Higgs boson, 1394\GeV for when it decays exclusively to a b quark and a \PZ boson, and 1449\GeV for when it decays equally in these two modes.

  • Table 1

    Table 1, Page 6

    10.17182/hepdata.99690.v1/t1

    Measured values of the trigger efficiencies for events with $\HT > 1350\GeV$. The uncertainties are statistical only.

  • Figure 2 4-Jet bHbH

    Figure 2, Page 8 (Upper left)

    10.17182/hepdata.99690.v1/t2

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 4-Jet bHbZ

    Figure 2, Page 8 (Middle left)

    10.17182/hepdata.99690.v1/t3

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 4-Jet bZbZ

    Figure 2, Page 8 (Lower left)

    10.17182/hepdata.99690.v1/t4

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 5-Jet bHbH

    Figure 2, Page 8 (Upper center)

    10.17182/hepdata.99690.v1/t5

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 5-Jet bHbZ

    Figure 2, Page 8 (Middle center)

    10.17182/hepdata.99690.v1/t6

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 5-Jet bZbZ

    Figure 2, Page 8 (Lower center)

    10.17182/hepdata.99690.v1/t7

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 6-Jet bHbH

    Figure 2, Page 8 (Upper right)

    10.17182/hepdata.99690.v1/t8

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 6-Jet bHbZ

    Figure 2, Page 8 (Middle right)

    10.17182/hepdata.99690.v1/t9

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 2 6-Jet bZbZ

    Figure 2, Page 8 (Lower right)

    10.17182/hepdata.99690.v1/t10

    Reconstructed VLQ mass distributions for simulated signal events with a generated VLQ mass $m_{B} = 1200\GeV$. A moderate requirement of...

  • Figure 3 4-Jet

    Figure 3, Page 9 (left)

    10.17182/hepdata.99690.v1/t11

    Distribution of $\chi^{2}$/ndf for the best jet combination for simulated 1200\GeV VLQ events (red histogram) and data (black points), for...

  • Figure 3 5-Jet

    Figure 3, Page 9 (center)

    10.17182/hepdata.99690.v1/t12

    Distribution of $\chi^{2}$/ndf for the best jet combination for simulated 1200\GeV VLQ events (red histogram) and data (black points), for...

  • Figure 3 6-Jet

    Figure 3, Page 9 (right)

    10.17182/hepdata.99690.v1/t13

    Distribution of $\chi^{2}$/ndf for the best jet combination for simulated 1200\GeV VLQ events (red histogram) and data (black points), for...

  • Figure 4 4-Jet

    Figure 4, Page 10 (left)

    10.17182/hepdata.99690.v1/t14

    Distributions of the average reconstructed mass of VLQ candidates for the jet combination with the least $\chi^{2}$ in 4-jet (left),...

  • Figure 4 5-Jet

    Figure 4, Page 10 (center)

    10.17182/hepdata.99690.v1/t15

    Distributions of the average reconstructed mass of VLQ candidates for the jet combination with the least $\chi^{2}$ in 4-jet (left),...

  • Figure 4 6-Jet

    Figure 4, Page 10 (right)

    10.17182/hepdata.99690.v1/t16

    Distributions of the average reconstructed mass of VLQ candidates for the jet combination with the least $\chi^{2}$ in 4-jet (left),...

  • Figure 5 4-Jet bHbH

    Figure 5, Page 11 (Upper left)

    10.17182/hepdata.99690.v1/t17

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 4-Jet bHbZ

    Figure 5, Page 11 (Middle left)

    10.17182/hepdata.99690.v1/t18

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 4-Jet bZbZ

    Figure 5, Page 11 (Lower left)

    10.17182/hepdata.99690.v1/t19

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 5-Jet bHbH

    Figure 5, Page 11 (Upper center)

    10.17182/hepdata.99690.v1/t20

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 5-Jet bHbZ

    Figure 5, Page 11 (Middle center)

    10.17182/hepdata.99690.v1/t21

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 5-Jet bZbZ

    Figure 5, Page 11 (Lower center)

    10.17182/hepdata.99690.v1/t22

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 6-Jet bHbH

    Figure 5, Page 11 (Upper right)

    10.17182/hepdata.99690.v1/t23

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 6-Jet bHbZ

    Figure 5, Page 11 (Middle right)

    10.17182/hepdata.99690.v1/t24

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 5 6-Jet bZbZ

    Figure 5, Page 11 (Lower right)

    10.17182/hepdata.99690.v1/t25

    Dependence of the BJTF on the average reconstructed VLQ mass in the control region, 12 < $\chi^{2}$/ndf < 48 for...

  • Figure 6 4-Jet bHbH

    Figure 6, Page 12 (Upper left)

    10.17182/hepdata.99690.v1/t26

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 4-Jet bHbZ

    Figure 6, Page 12 (Middle left)

    10.17182/hepdata.99690.v1/t27

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 4-Jet bZbZ

    Figure 6, Page 12 (Lower left)

    10.17182/hepdata.99690.v1/t28

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 5-Jet bHbH

    Figure 6, Page 12 (Upper center)

    10.17182/hepdata.99690.v1/t29

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 5-Jet bHbZ

    Figure 6, Page 12 (Middle center)

    10.17182/hepdata.99690.v1/t30

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 5-Jet bZbZ

    Figure 6, Page 12 (Lower center)

    10.17182/hepdata.99690.v1/t31

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 6-Jet bHbH

    Figure 6, Page 12 (Upper right)

    10.17182/hepdata.99690.v1/t32

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 6-Jet bHbZ

    Figure 6, Page 12 (Middle right)

    10.17182/hepdata.99690.v1/t33

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 6 6-Jet bZbZ

    Figure 6, Page 12 (Lower right)

    10.17182/hepdata.99690.v1/t34

    Dependence of the BJTF on $\chi^{2}$/ndf in the low-mass VLQ region, for 4-jet (left column), 5-jet, (center column) and 6-jet...

  • Figure 7 4-Jet bHbH

    Figure 7, Page 13 (Upper left)

    10.17182/hepdata.99690.v1/t35

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 4-Jet bHbZ

    Figure 7, Page 13 (Middle left)

    10.17182/hepdata.99690.v1/t36

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 4-Jet bZbZ

    Figure 7, Page 13 (Lower left)

    10.17182/hepdata.99690.v1/t37

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 5-Jet bHbH

    Figure 7, Page 13 (Upper center)

    10.17182/hepdata.99690.v1/t38

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 5-Jet bHbZ

    Figure 7, Page 13 (Middle center)

    10.17182/hepdata.99690.v1/t39

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 5-Jet bZbZ

    Figure 7, Page 13 (Lower center)

    10.17182/hepdata.99690.v1/t40

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 6-Jet bHbH

    Figure 7, Page 13 (Upper right)

    10.17182/hepdata.99690.v1/t41

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 6-Jet bHbZ

    Figure 7, Page 13 (Middle right)

    10.17182/hepdata.99690.v1/t42

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 7 6-Jet bZbZ

    Figure 7, Page 13 (Lower right)

    10.17182/hepdata.99690.v1/t43

    The reduction factor in data events, for 4-jet (left column), 5-jet (center column), and 6-jet (right column) multiplicities, and for...

  • Figure 8 4-Jet bHbH

    Figure 8, Page 13 (Upper left)

    10.17182/hepdata.99690.v1/t44

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 4-Jet bHbZ

    Figure 8, Page 13 (Middle left)

    10.17182/hepdata.99690.v1/t45

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 4-Jet bZbZ

    Figure 8, Page 13 (Lower left)

    10.17182/hepdata.99690.v1/t46

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 5-Jet bHbH

    Figure 8, Page 13 (Upper center)

    10.17182/hepdata.99690.v1/t47

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 5-Jet bHbZ

    Figure 8, Page 13 (Middle center)

    10.17182/hepdata.99690.v1/t48

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 5-Jet bZbZ

    Figure 8, Page 13 (Lower center)

    10.17182/hepdata.99690.v1/t49

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 6-Jet bHbH

    Figure 8, Page 13 (Upper right)

    10.17182/hepdata.99690.v1/t50

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 6-Jet bHbZ

    Figure 8, Page 13 (Middle right)

    10.17182/hepdata.99690.v1/t51

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 8 6-Jet bZbZ

    Figure 8, Page 13 (Lower right)

    10.17182/hepdata.99690.v1/t52

    The reduction factor in $m_B$ = 1200 GeV VLQ signal events, for 4-jet (left column), 5-jet (center column), and 6-jet...

  • Figure 9 4-Jet bHbH

    Figure 9, Page 18 (Upper left)

    10.17182/hepdata.99690.v1/t53

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 4-Jet bHbZ

    Figure 9, Page 18 (Middle left)

    10.17182/hepdata.99690.v1/t54

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 4-Jet bZbZ

    Figure 9, Page 18 (Lower left)

    10.17182/hepdata.99690.v1/t55

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 5-Jet bHbH

    Figure 9, Page 18 (Upper center)

    10.17182/hepdata.99690.v1/t56

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 5-Jet bHbZ

    Figure 9, Page 18 (Middle center)

    10.17182/hepdata.99690.v1/t57

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 5-Jet bZbZ

    Figure 9, Page 18 (Lower center)

    10.17182/hepdata.99690.v1/t58

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 6-Jet bHbH

    Figure 9, Page 18 (Upper right)

    10.17182/hepdata.99690.v1/t59

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 6-Jet bHbZ

    Figure 9, Page 18 (Middle right)

    10.17182/hepdata.99690.v1/t60

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 9 6-Jet bZbZ

    Figure 9, Page 18 (Lower right)

    10.17182/hepdata.99690.v1/t61

    Data (black points), expected background (solid blue histogram), and expected background plus a VLQ signal for different VLQ masses (colored...

  • Figure 10

    Figure 10, Page 19

    10.17182/hepdata.99690.v1/t62

    Expected limits on the VLQ mass at 95% CL as a function of the branching fractions $\mathcal{B}$( B -> bH...

  • Figure 11

    Figure 11, Page 19

    10.17182/hepdata.99690.v1/t63

    Observed limits on the VLQ mass at 95% CL as a function of the branching fractions $\mathcal{B}$( B -> bH...

  • Figure 12 (Upper Left)

    Figure 12, Page 20 (Upper Left)

    10.17182/hepdata.99690.v1/t64

    The 95% confidence limit on the cross section for VLQ pair production as a function of VLQ mass for three...

  • Figure 12 (Upper Right)

    Figure 12, Page 20 (Upper Right)

    10.17182/hepdata.99690.v1/t65

    The 95% confidence limit on the cross section for VLQ pair production as a function of VLQ mass for three...

  • Figure 12 (Lower)

    Figure 12, Page 20 (Lower)

    10.17182/hepdata.99690.v1/t66

    The 95% confidence limit on the cross section for VLQ pair production as a function of VLQ mass for three...

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