Higgs boson decay into hadronic jets

Berger, Edmond L.; Chiang, Cheng‐Wei; Jiang, Jing; Tait, Tim M. P.; Wagner, Carlos E. M.

doi:10.1103/physrevd.66.095001

Cited by 28 publications

(21 citation statements)

References 102 publications

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“…The above result generalizes that for a single quark state [14]. For a pion, I J L = I J R = 2, and the lowest infrared power is −1, obtained when p J L,R = 1, Fig.…”

supporting

confidence: 85%

“…has been considered in [12,13,14] Let us use p J to denote the number of collinear quarks or gluons with-physical-polarization lines entering the hard part from jet J; use l j to represent the number of collinear gluons of longitudinal polarization through a similar attachment; use E J to label the number of three-point vertices in the jet, and s J the number of soft gluons with scalar polarization and soft quarks attaching to the jet. Then the soft part has infrared power,…”

mentioning

confidence: 99%

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Factorization of large-x quark distributions in a hadron

Yuan

2005

Physics Letters B

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We present a factorization formula for valence quark distributions in a hadron in x → 1 limit. For the example of pion, we arrive at the form of factorization by analyzing momentum flow in the leading and high-order Feynman diagrams. The result confirms the well-known 1−x scaling rule to all orders in perturbation theory, providing the non-perturbative matrix elements for the infrareddivergence factors. We comment on re-summation of perturbative single and double logarithms in 1 − x.

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“…The above result generalizes that for a single quark state [14]. For a pion, I J L = I J R = 2, and the lowest infrared power is −1, obtained when p J L,R = 1, Fig.…”

supporting

confidence: 85%

mentioning

confidence: 99%

Factorization of large-x quark distributions in a hadron

Yuan

2005

Physics Letters B

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“…[9], its n f part was derived before in Refs. [58,59]. Our new results (3.1) and (3.2) specify the n 2 f coefficient of A 4 .…”

Section: Results In N-spacementioning

confidence: 55%

Large-n contributions to the four-loop splitting functions in QCD

et al. 2017

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We have computed the fourth-order n 2 f contributions to all three non-singlet quark-quark splitting functions and their four n 3 f flavour-singlet counterparts for the evolution of the parton distributions of hadrons in perturbative QCD with n f effectively massless quark flavours. The analytic form of these functions is presented in both Mellin N-space and momentum-fraction x-space; the large-x and small-x limits are discussed. Our results agree with all available predictions derived from lower-order information. The large-x limit of the quark-quark cases provides the complete n 2 f part of the four-loop cusp anomalous dimension which agrees with two recent partial computations.

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“…For massless jets there has been a lot of work done on the program of resumming logs in event-shape variables [31,[31][32][33][34][35][36][37][38][39][40][41][42][43][44]. In this paper we do not use the traditional approach to resummation, but rather an approach that sums the same large logs based on the renormalization of operators in effective field theories, including HQET and SCET [3,7].…”

Section: Introductionmentioning

confidence: 99%

Top jets in the peak region: Factorization analysis with next-to-leading-log resummation

et al. 2008

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We consider top quarks produced at large energy in e e ÿ collisions, and address the question of what top mass can be measured from reconstruction. The production process is characterized by well-separated scales: the center-of-mass energy Q, the top mass m, the top decay width ÿ t , and also QCD ; scales which can be disentangled with effective theory methods. In particular we show how the mass measurement depends on the way in which soft radiation is treated, and that this can shift the mass peak by an amount of order Q QCD =m. We sum large logs for Q m ÿ t > QCD and demonstrate that the renormalization group ties together the jet and soft interactions below the scale m. Necessary conditions for the invariant mass spectrum to be protected from large logs are formulated. Results for the cross section are presented at next-to-leading order with next-to-leading-log (NLL) resummation, for invariant masses in the peak region and the tail region. Using our results we also predict the thrust distribution for massive quark jets at NLL order for large thrust. We demonstrate that soft radiation can be precisely controlled using data on massless jet production, and that in principle, a short-distance mass parameter can be measured using jets with precision better than QCD .

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Higgs boson decay into hadronic jets

Abstract: The remarkable agreement of electroweak data with standard model (SM)

Cited by 28 publications

References 102 publications

Factorization of large-x quark distributions in a hadron

Factorization of large-x quark distributions in a hadron

Large-n contributions to the four-loop splitting functions in QCD

Top jets in the peak region: Factorization analysis with next-to-leading-log resummation

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