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Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV
- Adam, J;
- Adamová, D;
- Aggarwal, MM;
- Rinella, G Aglieri;
- Agnello, M;
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- Varma, R;
- Vasileiou, M;
- Vasiliev, A;
- Vauthier, A;
- Doce, O Vázquez;
- Vechernin, V;
- Veen, AM;
- Velure, A;
- Vercellin, E;
- Limón, S Vergara;
- Vernet, R;
- Vértesi, R;
- Vickovic, L;
- Vigolo, S;
- Viinikainen, J;
- Vilakazi, Z;
- Baillie, O Villalobos;
- Tello, A Villatoro;
- Vinogradov, A;
- Vinogradov, L;
- Virgili, T;
- Vislavicius, V;
- Vodopyanov, A;
- Völkl, MA;
- Voloshin, K;
- Voloshin, SA;
- Volpe, G;
- von Haller, B;
- Vorobyev, I;
- Voscek, D;
- Vranic, D;
- Vrláková, J;
- Vulpescu, B;
- Wagner, B;
- Wagner, J;
- Wang, H;
- Wang, M;
- Watanabe, D;
- Watanabe, Y;
- Weber, M;
- Weber, SG;
- Weiser, DF;
- Wessels, JP;
- Westerhoff, U;
- Whitehead, AM;
- Wiechula, J;
- Wikne, J;
- Wilk, G;
- Wilkinson, J;
- Willems, GA;
- Williams, MCS;
- Windelband, B;
- Winn, M;
- Yalcin, S;
- Yang, P;
- Yano, S;
- Yin, Z;
- Yokoyama, H;
- Yoo, I-K;
- Yoon, JH;
- Yurchenko, V;
- Zaccolo, V;
- Zaman, A;
- Zampolli, C;
- Zanoli, HJC;
- Zaporozhets, S;
- Zardoshti, N;
- Zarochentsev, A;
- Závada, P;
- Zaviyalov, N;
- Zbroszczyk, H;
- Zgura, IS;
- Zhalov, M;
- Zhang, H;
- Zhang, X;
- Zhang, Y;
- Zhang, C;
- Zhang, Z;
- Zhao, C;
- Zhigareva, N;
- Zhou, D;
- Zhou, Y;
- Zhou, Z;
- Zhu, H;
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- Zimmermann, MB;
- Zinovjev, G;
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Published Web Location
https://doi.org/10.1016/j.physletb.2016.10.048Abstract
We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta 83 GeV/c, while with decreasing momenta an enhancement develops reaching about 5 at low pTassoc. On the near side, an enhancement of IAA between 1.2 at the highest to 1.8 at the lowest pTassoc is observed. The data are compared to parton-energy-loss predictions of the JEWEL and AMPT event generators, as well as to a perturbative QCD calculation with medium-modified fragmentation functions. All calculations qualitatively describe the away-side suppression at high pTassoc. Only AMPT captures the enhancement at low pTassoc, both on the near and away side. However, it also underpredicts IAA above 5 GeV/c, in particular on the near-side.
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