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Comprehensive measurements of $t$-channel single top-quark production cross sections at $\sqrt{s} = 7$ TeV with the ATLAS detector

The ATLAS collaboration
Phys.Rev.D 90 (2014) 112006, 2014.

Abstract (data abstract)
- CERN-LHC. This article presents measurements of the $t$-channel single top-quark $(t)$ and top-antiquark $(\bar t)$ total production cross sections $\sigma(tq)$ and $\sigma(\bar tq)$, their ratio $R_{t}=\sigma(tq)/\sigma(\bar tq)$, and a measurement of the inclusive production cross section $\sigma(tq+\bar tq)$ in proton-proton collisions at $\sqrt{s}~=~7~\mathrm{TeV}$ at the LHC. Differential cross sections for the $tq$ and $\bar tq$ processes are measured as a function of the transverse momentum and the absolute value of the rapidity of $t$ and $\bar t$, respectively. The analyzed data set was recorded with the ATLAS detector and corresponds to an integrated luminosity of $4.59~\mathrm{fb}^{-1}$. Selected events contain one charged lepton, large missing transverse momentum, and two or three jets. The cross sections are measured by performing a binned maximum-likelihood fit to the output distributions of neural networks. The resulting measurements are $\sigma(tq)=46 \pm 1(\mathrm{stat})\pm 6(\mathrm{syst})~\mathrm{pb}$, $\sigma(\bar tq)=23 \pm 1(\mathrm{stat})\pm 3(\mathrm{syst})~\mathrm{pb}$, $R_{t}=2.04 \pm 0.13(\mathrm{stat})\pm 0.12(\mathrm{syst})$, and $\sigma(tq+\bar tq)=68 \pm 2(\mathrm{stat})\pm 8(\mathrm{syst})~\mathrm{pb}$, consistent with the Standard Model expectation. The uncertainty on the measured cross sections is dominated by systematic uncertainties, while the uncertainty on $R_{t}$ is mainly statistical. Using the ratio of $\sigma(tq+\bar tq)$ to its theoretical prediction, and assuming that the top-quark-related CKM matrix elements obey the relation $|V_{tb}|\gg |V_{ts}|$, $|V_{td}|$, we determine $|V_{tb}|=1.02 \pm 0.07$.

  • Table 1

    Table I on page 112006-7 of the paper

    10.17182/hepdata.64385.v2/t1

    Predicted and observed events yields for the 2-jet and 3-jet channels considered in this measurement. The multijet background is estimated...

  • Table 2

    Table III on page 112006-18 of the paper

    10.17182/hepdata.64385.v2/t2

    Detailed list of the contribution of each source of uncertainty to the total uncertainty on the measured values of $\sigma(tq)$,...

  • Table 3

    Page 112006-19 of the paper

    10.17182/hepdata.64385.v2/t3

    The cross sections for top-quark and top-antiquark production in the t-channel, together with the cross-section ratio.

  • Table 4

    Table IV on page 112006-20 of the paper

    10.17182/hepdata.64385.v2/t4

    Parametrization factors for the $m_{t}$ dependence [see Eq. (4) in the paper] of $\sigma(tq)$, $\sigma(\bar tq)$, and $\sigma(t q+\bar t...

  • Table 5

    Page 112006-20 of the paper

    10.17182/hepdata.64385.v2/t5

    The value of $|V_{tb}|^{2}$ is extracted by dividing the measured value of $\sigma(t q+\bar t q)$ by the prediction of...

  • Table 6

    Table V on page 112006-21 of the paper

    10.17182/hepdata.64385.v2/t6

    Event yields for the 2-jet-$\ell^{+}$ and 2-jet-$\ell^{-}$ HPR channels. The expectation for the signal and background yields correspond to the...

  • Table 7

    FIG. 14(a) on page 112006-22 of the paper

    10.17182/hepdata.64385.v2/t7

    Migration matrix relating the parton level $p_{\mathrm{T}}(t)$ shown on the $y$ axis and the reconstruction level $p_{\mathrm{T}}(\ell \nu b)$ shown...

  • Table 8

    FIG. 14(b) on page 112006-22 of the paper

    10.17182/hepdata.64385.v2/t8

    Migration matrix relating the parton level $p_{\mathrm{T}}(\bar t)$ shown on the $y$ axis and the reconstruction level $p_{\mathrm{T}}(\ell \nu b)$...

  • Table 9

    FIG. 14(c) on page 112006-22 of the paper

    10.17182/hepdata.64385.v2/t9

    Migration matrix relating the parton level $|y(t)|$ shown on the $y$ axis and the reconstruction level $|y(\ell \nu b)|$ shown...

  • Table 10

    FIG. 14(d) on page 112006-22 of the paper

    10.17182/hepdata.64385.v2/t10

    Migration matrix relating the parton level $|y(\bar t)|$ shown on the $y$ axis and the reconstruction level $|y(\ell \nu b)|$...

  • Table 11

    Table VI on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t11

    Differential t-channel top-quark production cross section as a function of $p_{\mathrm{T}}(t)$ with the uncertainties for each bin given in percent.

  • Table 12

    Table VI on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t12

    Differential t-channel top-quark production cross section as a function of $p_{\mathrm{T}}(\bar t)$ with the uncertainties for each bin given in...

  • Table 13

    Table VI on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t13

    Differential t-channel top-quark production cross section as a function of $|y(t)|$ with the uncertainties for each bin given in percent.

  • Table 14

    Table VI on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t14

    Differential t-channel top-quark production cross section as a function of $|y(\bar t)|$ with the uncertainties for each bin given in...

  • Table 15

    Table VII on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t15

    Normalized differential t-channel top-quark production cross section as a function of $p_{\mathrm{T}}(t)$ with the uncertainties for each bin given in...

  • Table 16

    Table VII on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t16

    Normalized differential t-channel top-quark production cross section as a function of $p_{\mathrm{T}}(\bar t)$ with the uncertainties for each bin given...

  • Table 17

    Table VII on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t17

    Normalized differential t-channel top-quark production cross section as a function of $|y(t)|$ with the uncertainties for each bin given in...

  • Table 18

    Table VII on page 112006-23 of the paper

    10.17182/hepdata.64385.v2/t18

    Normalized differential t-channel top-quark production cross section as a function of $|y(\bar t)|$ with the uncertainties for each bin given...

  • Table 19

    Table VIII on page 112006-25 of the paper

    10.17182/hepdata.64385.v2/t19

    Comparison between the measured differential cross sections and the predictions from the NLO calculation using the MSTW2008 PDF set. For...

  • Table 20

    Table IX on page 112006-26 of the paper

    10.17182/hepdata.64385.v2/t20

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{\mathrm{d}\sigma}{\mathrm{d}p_{\mathrm{T}}(t)}$ distribution...

  • Table 21

    Table X on page 112006-26 of the paper

    10.17182/hepdata.64385.v2/t21

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{\mathrm{d}\sigma}{\mathrm{d}p_{\mathrm{T}}(\bar t)}$...

  • Table 22

    Table XI on page 112006-27 of the paper

    10.17182/hepdata.64385.v2/t22

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{\mathrm{d}\sigma}{\mathrm{d}|y(t)|}$ distribution...

  • Table 23

    Table XII on page 112006-27 of the paper

    10.17182/hepdata.64385.v2/t23

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{\mathrm{d}\sigma}{\mathrm{d}|y(\bar t)|}$...

  • Table 24

    Table XIII on page 112006-28 of the paper

    10.17182/hepdata.64385.v2/t24

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{1}{\sigma}\dfrac{\mathrm{d}\sigma}{\mathrm{d}p_{\mathrm{T}}(t)}$ distribution...

  • Table 25

    Table XIV on page 112006-28 of the paper

    10.17182/hepdata.64385.v2/t25

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{1}{\sigma}\dfrac{\mathrm{d}\sigma}{\mathrm{d}p_{\mathrm{T}}(\bar t)}$...

  • Table 26

    Table XV on page 112006-29 of the paper

    10.17182/hepdata.64385.v2/t26

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{1}{\sigma}\dfrac{\mathrm{d}\sigma}{\mathrm{d}|y(t)|}$ distribution...

  • Table 27

    Table XVI on page 112006-29 of the paper

    10.17182/hepdata.64385.v2/t27

    Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{1}{\sigma}\dfrac{\mathrm{d}\sigma}{\mathrm{d}|y(\bar t)|}$...

  • Table 28

    FIG. 17(a) on page 112006-30 of the paper

    10.17182/hepdata.64385.v2/t28

    Statistical correlation matrices for the differential cross section as a function of $p_{\mathrm{T}}(t)$.

  • Table 29

    FIG. 17(b) on page 112006-30 of the paper

    10.17182/hepdata.64385.v2/t29

    Statistical correlation matrices for the differential cross section as a function of $p_{\mathrm{T}}(\bar t)$.

  • Table 30

    FIG. 17(c) on page 112006-30 of the paper

    10.17182/hepdata.64385.v2/t30

    Statistical correlation matrices for the differential cross section as a function of $|y(t)|$.

  • Table 31

    FIG. 17(d) on page 112006-30 of the paper

    10.17182/hepdata.64385.v2/t31

    Statistical correlation matrices for the differential cross section as a function of $|y(\bar t)|$.

  • Table 32

    FIG. 18(a) on page 112006-31 of the paper

    10.17182/hepdata.64385.v2/t32

    Statistical correlation matrices for the normalized differential cross section as a function of $p_{\mathrm{T}}(t)$.

  • Table 33

    FIG. 18(b) on page 112006-31 of the paper

    10.17182/hepdata.64385.v2/t33

    Statistical correlation matrices for the normalized differential cross section as a function of $p_{\mathrm{T}}(\bar t)$.

  • Table 34

    FIG. 18(c) on page 112006-31 of the paper

    10.17182/hepdata.64385.v2/t34

    Statistical correlation matrices for the normalized differential cross section as a function of $|y(t)|$.

  • Table 35

    FIG. 18(d) on page 112006-31 of the paper

    10.17182/hepdata.64385.v2/t35

    Statistical correlation matrices for the normalized differential cross section as a function of $|y(\bar t)|$.

Version 2 modifications: Detailed tables of uncertainties and statistical correlation matrices have been added.

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