Measurement of quark- and gluon-like jet fractions using jet charge in PbPb and pp collisions at 5.02 TeV

The CMS collaboration
JHEP 07 (2020) 115, 2020.

Abstract
The momentum-weighted sum of the electric charges of particles inside a jet, known as jet charge, is sensitive to the electric charge of the particle initiating the parton shower. This paper presents jet charge distributions in $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV lead-lead (PbPb) and proton-proton (pp) collisions recorded with the CMS detector at the LHC. These data correspond to integrated luminosities of 404 $\mu$b$^{-1}$ and 27.4 pb$^{-1}$ for PbPb and pp collisions, respectively. Leveraging the sensitivity of the jet charge to fundamental differences in the electric charges of quarks and gluons, the jet charge distributions from simulated events are used as templates to extract the quark- and gluon-like jet fractions from data. The modification of these jet fractions is examined by comparing pp and PbPb data as a function of the overlap of the colliding Pb nuclei (centrality). This measurement tests the color charge dependence of jet energy loss due to interactions with the quark-gluon plasma. No significant modification between different centrality classes and with respect to pp results is observed in the extracted fractions of quark- and gluon-like jet fractions.

  • Table 1

    Data from top panel of Fig. 1 and top of middle panel in Fig. 6.

    10.17182/hepdata.88294.v1/t1

    Unfolded jet charge measurements for the $p_{T}$-weighting factor $\kappa = 0.5$ and a minimum track $p_{T}$ of 1 GeV for...

  • Table 2a

    Data from Fig. 2

    10.17182/hepdata.88294.v1/t2

    The standard deviation of the jet charge distributions with different track $p_{T}$ thresholds and $\kappa$ value of 0.5 for pp...

  • Table 2b

    Data from Fig. 2

    10.17182/hepdata.88294.v1/t3

    The standard deviation of the jet charge distributions with different track $p_{T}$ thresholds and $\kappa$ value of 0.3 for pp...

  • Table 2c

    Data from Fig. 2

    10.17182/hepdata.88294.v1/t4

    The standard deviation of the jet charge distributions with different track $p_{T}$ thresholds and $\kappa$ value pf 0.7 for pp...

  • Table 3

    Data from Fig. 3

    10.17182/hepdata.88294.v1/t5

    Fitting results for the extraction of gluon-like jet fractions in pp and PbPb data shown for different track $p_{T}$ threshold...

  • Table 4a

    Data from Fig. 4

    10.17182/hepdata.88294.v1/t6

    Fitting results for the extraction of gluon-like jet fractions in pp and PbPb data shown for $p_{T}$-weighting factor $\kappa$ values...

  • Table 4b

    Data from Fig. 4

    10.17182/hepdata.88294.v1/t7

    Fitting results for the extraction of gluon-like jet fractions in pp and PbPb data shown for $p_{T}$-weighting factor $\kappa$ values...

  • Table 5

    Data from top panel of Fig. 5 and top of middle panel in Fig. 7.

    10.17182/hepdata.88294.v1/t8

    Unfolded jet charge measurements for the $p_{T}$-weighting factor $\kappa = 0.5$ and a minimum track $p_{T}$ of 2 GeV for...

  • Table 6

    Data from middle panel of Fig. 5

    10.17182/hepdata.88294.v1/t9

    Unfolded jet charge measurements for the $p_{T}$-weighting factor $\kappa = 0.5$ and a minimum track $p_{T}$ of 4 GeV for...

  • Table 7

    Data from bottom panel of Fig. 5

    10.17182/hepdata.88294.v1/t10

    Unfolded jet charge measurements for the $p_{T}$-weighting factor $\kappa = 0.5$ and a minimum track $p_{T}$ of 5 GeV for...

  • Table 8

    Data from top panel of Fig. 6

    10.17182/hepdata.88294.v1/t11

    Unfolded jet charge measurements for a minimum track $p_{T}$ threshold of 1 GeV and $p_{T}$-weighting factor $\kappa = 0.3$ for...

  • Table 9

    Data from bottom panel of Fig. 6

    10.17182/hepdata.88294.v1/t12

    Unfolded jet charge measurements for a minimum track $p_{T}$ threshold of 1 GeV and $p_{T}$-weighting factor $\kappa = 0.7$ for...

  • Table 10

    Data from top panel of Fig. 7

    10.17182/hepdata.88294.v1/t13

    Unfolded jet charge measurements for a minimum track $p_{T}$ threshold of 2 GeV and $p_{T}$-weighting factor $\kappa = 0.3$ for...

  • Table 11

    Data from bottom panel of Fig. 7

    10.17182/hepdata.88294.v1/t14

    Unfolded jet charge measurements for a minimum track $p_{T}$ threshold of 2 GeV and $p_{T}$-weighting factor $\kappa = 0.7$ for...

Loading Data...

Ask a Question


Your question will be emailed to those involved with the submission. Please mention the relevant table.


Please log in to HEPData to send a question.