The production of jets in association with bosons, reconstructed via the and decay channels, is studied in and, for the first time, in Pb-Pb collisions. Both data samples were collected by the CMS experiment at the LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The Pb-Pb collisions were analyzed in the 0%–30% centrality range. The back-to-back azimuthal alignment was studied in both and Pb-Pb collisions for bosons with transverse momentum and a recoiling jet with . The imbalance , as well as the average number of jet partners per , , was studied in intervals of . The is found to be smaller in Pb-Pb than in collisions, which suggests that in Pb-Pb collisions a larger fraction of partons associated with the bosons fall below the threshold because they lose energy.
Sirunyan, A. M., et al. "Study of Jet Quenching with <math display='inline'><mrow><mi>Z</mi><mo>+</mo><mrow><mtext>jet</mtext></mrow></mrow></math> Correlations in Pb-Pb and <math display='inline'><mi>p</mi><mi>p</mi></math> Collisions at <math display='inline'><mrow><msub><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub><mo>=</mo><mn>5.02</mn><mtext></mtext><mtext></mtext><mi>TeV</mi></mrow></math>." Physical Review Letters, vol. 119, no. 8, Aug. 2017. https://doi.org/10.1103/PhysRevLett.119.082301
Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., König, A., ... Woods, N. (2017). Study of Jet Quenching with <math display='inline'><mrow><mi>Z</mi><mo>+</mo><mrow><mtext>jet</mtext></mrow></mrow></math> Correlations in Pb-Pb and <math display='inline'><mi>p</mi><mi>p</mi></math> Collisions at <math display='inline'><mrow><msub><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub><mo>=</mo><mn>5.02</mn><mtext></mtext><mtext></mtext><mi>TeV</mi></mrow></math>. Physical Review Letters, 119(8). https://doi.org/10.1103/PhysRevLett.119.082301
Sirunyan, A. M., Tumasyan, A., Adam, W., et al., "Study of Jet Quenching with <math display='inline'><mrow><mi>Z</mi><mo>+</mo><mrow><mtext>jet</mtext></mrow></mrow></math> Correlations in Pb-Pb and <math display='inline'><mi>p</mi><mi>p</mi></math> Collisions at <math display='inline'><mrow><msub><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub><mo>=</mo><mn>5.02</mn><mtext></mtext><mtext></mtext><mi>TeV</mi></mrow></math>," Physical Review Letters 119, no. 8 (2017), https://doi.org/10.1103/PhysRevLett.119.082301
@article{osti_1376272,
author = {Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Asilar, E. and Bergauer, T. and Brandstetter, J. and Brondolin, E. and Dragicevic, M. and Erö, J. and Flechl, M. and others},
title = {Study of Jet Quenching with <math display='inline'><mrow><mi>Z</mi><mo>+</mo><mrow><mtext>jet</mtext></mrow></mrow></math> Correlations in Pb-Pb and <math display='inline'><mi>p</mi><mi>p</mi></math> Collisions at <math display='inline'><mrow><msub><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub><mo>=</mo><mn>5.02</mn><mtext></mtext><mtext></mtext><mi>TeV</mi></mrow></math>},
annote = {The production of jets in association with Z bosons, reconstructed via the μ+μ– and e+e– decay channels, is studied in pp and, for the first time, in Pb-Pb collisions. Both data samples were collected by the CMS experiment at the LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The Pb-Pb collisions were analyzed in the 0%–30% centrality range. The back-to-back azimuthal alignment was studied in both pp and Pb-Pb collisions for Z bosons with transverse momentum pTZ>60 GeV/c and a recoiling jet with pTjet>30 GeV/c. The pT imbalance xjZ=pTjet/pTZ, as well as the average number of jet partners per Z, RjZ, was studied in intervals of pTZ. The RjZ is found to be smaller in Pb-Pb than in pp collisions, which suggests that in Pb-Pb collisions a larger fraction of partons associated with the Z bosons fall below the 30 GeV/c pTjet threshold because they lose energy.},
doi = {10.1103/PhysRevLett.119.082301},
url = {https://www.osti.gov/biblio/1376272},
journal = {Physical Review Letters},
issn = {ISSN PRLTAO},
number = {8},
volume = {119},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2017},
month = {08}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3https://doi.org/10.1016/S0168-9002(03)01368-8