Home > Publications database > Back-to-back azimuthal correlations in $\mathrm {Z} +$jet events at high transverse momentum in the TMD parton branching method at next-to-leading order > print

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024 7 _ |a 10.1140/epjc/s10052-022-10715-0
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024 7 _ |a 1434-6052
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024 7 _ |a arXiv:2204.01528
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088 _ _ |a arXiv:2204.01528
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100 1 _ |a Yang, Heng
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245 _ _ |a Back-to-back azimuthal correlations in $\mathrm {Z} +$jet events at high transverse momentum in the TMD parton branching method at next-to-leading order
260 _ _ |a Heidelberg
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520 _ _ |a Azimuthal correlations in $\mathrm {Z} +$jet production at large transverse momenta are computed by matching Parton-Branching (PB) TMD parton distributions and showers with NLO calculations via MCatNLO. The predictions are compared with those for dijet production in the same kinematic range. The azimuthal correlations $\Delta \phi $ between the Z boson and the leading jet are steeper compared to those in dijet production at transverse momenta $\mathcal{O}(100)$ GeV , while they become similar for very high transverse momenta ${{\mathcal {O}}}(1000)$ GeV . The different patterns of $\mathrm {Z} +$jet and dijet azimuthal correlations can be used to search for potential factorization-breaking effects in the back-to-back region, which depend on the different color and spin structure of the final states and their interferences with the initial states. In order to investigate these effects experimentally, we propose to measure the ratio of the distributions in $\Delta \phi $ for $\mathrm {Z} +$jet- and multijet production at low and at high transverse momenta, and compare the results to predictions obtained assuming factorization. We examine the role of theoretical uncertainties by performing variations of the factorization scale, renormalization scale and matching scale. In particular, we present a comparative study of matching scale uncertainties in the cases of PB-TMD and collinear parton showers.
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650 _ 7 |a transverse momentum: high
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650 _ 7 |a dijet: production
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650 _ 7 |a measure: ratio
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650 _ 7 |a parton: showers
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650 _ 7 |a jet: production
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650 _ 7 |a scale: factorization
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650 _ 7 |a jet: multiple production
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650 _ 7 |a interference
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693 _ _ |a LHC
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700 1 _ |a Bermudez Martinez, Armando
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700 1 _ |a Estevez Banos, Luis Ignacio
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700 1 _ |a Hautmann, Francesco
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700 1 _ |a Jung, H.
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700 1 _ |a Mendizabal Morentin, Mikel
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700 1 _ |a Moral Figueroa, Keila
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700 1 _ |a Prestel, S.
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700 1 _ |a Taheri Monfared, Sara
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700 1 _ |a van Kampen, A. M.
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700 1 _ |a Wang, Qun
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700 1 _ |a Wichmann, Katarzyna
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773 _ _ |a 10.1140/epjc/s10052-022-10715-0
|g Vol. 82, no. 8, p. 755
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787 0 _ |a Yang, Heng et.al.
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|t Back-to-back azimuthal correlations in $\mathrm {Z} +$jet events at high transverse momentum in the TMD parton branching method at next-to-leading order
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