Dijet Imbalance Measurements in Au + Au and \u3cem\u3epp\u3c/em\u3e Collisions at √\u3cem\u3e\u3csup\u3es\u3c/sup\u3e\u3csub\u3eNN\u3c/sub\u3e\u3c/em\u3e = 200 GeV at STAR
- Adamczyk, L.
- Adkins, James K.
- Agakishiev, G.
- Aggarwal, M. M.
- Ahammed, Z.
- Alekseev, I.
- Anderson, D. M.
- Aoyama, R.
- Aparin, A.
- Arkhipkin, D.
- Aschenauer, E. C.
- Ashraf, M. U.
- Attri, A.
- Averichev, G. S.
- Bai, X.
- Bairathi, V.
- Bellwied, R.
- Bhasin, A.
- Bhati, A. K.
- Bhattarai, P.
- Bielcik, J.
- Bielcikova, J.
- Bland, L. C.
- Bordyuzhin, I. G.
- Bouchet, J.
- Brandenburg, J. D.
- Brandin, A. V.
- Brown, D.
- Bunzarov, I.
- Butterworth, J.
- Fatemi, Renee H.
- Ramachandran, Suvarna
Publication date
August 2017
DOI Publisher
American Physical Society (APS) Language
EnglishAbstract
We report the first dijet transverse momentum asymmetry measurements from Au + Au and pp collisions at RHIC. The two highest-energy back-to-back jets reconstructed from fragments with transverse momenta above 2 GeV/c display a significantly higher momentum imbalance in heavy-ion collisions than in the pp reference. When reexamined with correlated soft particles included, we observe that these dijets then exhibit a unique new feature—momentum balance is restored to that observed in pp for a jet resolution parameter of R = 0.4, while rebalancing is not attained with a smaller value of R = 0.2
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