@article{3167211,
    title = "Measurement of jet quenching with semi-inclusive hadron-jet
distributions in central Pb-Pb collisions at root s(NN)=2.76 TeV",
    author = "Adam, J. and Adamova, D. and Aggarwal, M. M. and Rinella, G. Aglieri and and Agnello, M. and Agrawal, N. and Ahammed, Z. and Ahn, S. U. and Aimo, I. and and Aiola, S. and Ajaz, M. and Akindinov, A. and Alam, S. N. and and Aleksandrov, D. and Alessandro, B. and Alexandre, D. and Alfaro Molina, and R. and Alici, A. and Alkin, A. and Almaraz, J. R. M. and Alme, J. and and Alt, T. and Altinpinar, S. and Altsybeev, I. and Garcia Prado, C. Alves and and Andrei, C. and Andronic, A. and Anguelov, V. and Anielski, J. and and Anticic, T. and Antinori, F. and Antonioli, P. and Aphecetche, L. and and Appelshaeuser, H. and Arcelli, S. and Armesto, N. and Arnaldi, R. and and Arsene, I. C. and Arslandok, M. and Audurier, B. and Augustinus, A. and and Averbeck, R. and Azmi, M. D. and Bach, M. and Badala, A. and Baek, Y. W. and and Bagnasco, S. and Bailhache, R. and Bala, R. and Baldisseri, A. and and Pedrosa, F. Baltasar Dos Santos and Baral, R. C. and Barbano, A. 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G. and Yang, H. and Yang, P. and and Yano, S. and Yin, Z. and Yokoyama, H. and Yoo, I. -K. and Yurchenko, and V. and Yushmanov, I. and Zaborowska, A. and Zaccolo, V. and Zaman, A. and and Zampolli, C. and Zanoli, H. J. C. and Zaporozhets, S. and Zardoshti, and N. and Zarochentsev, A. and Zavada, P. and Zaviyalov, N. and Zbroszczyk, and H. and Zgura, I. S. and Zhalov, M. and Zhang, H. and Zhang, X. and and Zhang, Y. and Zhao, C. and Zhigareva, N. and Zhou, D. and Zhou, Y. and and Zhou, Z. and Zhu, H. and Zhu, J. and Zhu, X. and Zichichi, A. and and Zimmermann, A. and Zimmermann, M. B. and Zinovjev, G. and Zyzak, M. and and ALICE Collaboration",
    journal = "Journal of High Energy Physics",
    year = "2015",
    number = "9",
    pages = "1-42",
    publisher = "Springer-Verlag",
    issn = "1126-6708, 1029-8479",
    doi = "10.1007/JHEP09(2015)170",
    keywords = "Quark gluon plasma; Jet physics; Heavy Ions",
    abstract = "We report the measurement of a new observable of jet quenching in
central Pb-Pb collisions at root s(NN) = 2.76 TeV, based on the
semi-inclusive rate of charged jets recoiling from a high transverse
momentum (high-p T) charged hadron trigger. Jets are measured using
collinear-safe jet reconstruction with infrared cutoff for jet
constituents of 0.15 GeV, for jet resolution parameters R = 0.2, 0.4 and
0.5. Underlying event background is corrected at the event-ensemble
level, without imposing bias on the jet population. Recoil jet spectra
are reported in the range 20 < p(T,jet)(ch) < 100 GeV. Reference
distributions for pp collisions at root s = 2.76TeV are calculated using
Monte Carlo and NLO pQCD methods, which are validated by comparing with
measurements in pp collisions at root s = 7TeV. The recoil jet yield in
central Pb-Pb collisions is found to be suppressed relative to that in
pp collisions. No significant medium-induced broadening of the intra-jet
energy profile is observed within 0.5 radians relative to the recoil jet
axis. The angular distribution of the recoil jet yield relative to the
trigger axis is found to be similar in central Pb-Pb and pp collisions,
with no significant medium-induced acoplanarity observed. Large-angle
jet deflection, which may provide a direct probe of the nature of the
quasi-particles in hot QCD matter, is explored."
}