REVIEW 8 cited by
Color-Octet Fragmentation and the psi' Surplus at the Tevatron
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
The production rate of prompt $\psi'$'s at large transverse momentum at the Tevatron is larger than theoretical expectations by about a factor of 30. As a solution to this puzzle, we suggest that the dominant $\psi'$ production mechanism is the fragmentation of a gluon into a $c \bar c$ pair in a pointlike color-octet S-wave state, which subsequently evolves nonperturbatively into a $\psi'$ plus light hadrons. The contribution to the fragmentation function from this process is enhanced by a short-distance factor of $1/\alpha_s^2$ relative to the conventional color-singlet contribution. This may compensate for the suppression by $v^4$, where $v$ is the relative momentum of the charm quark in the $\psi'$. If this is indeed the dominant production mechanism at large $p_T$, then the prompt $\psi'$'s that are observed at the Tevatron should almost always be associated with a jet of light hadrons.
Forward citations
Cited by 8 Pith papers
-
Factorizing quarkonium production matrix elements using effective field theory
Factorizes NRQCD production matrix elements for S- and P-wave quarkonia into wavefunctions and universal chromo-electric/magnetic gluon correlators via hybrid vNRQCD/pNRQCD and Hubbard-Stratonovich transformation at l...
-
Impact of relativistic corrections to high-pT prompt-psi(2S) production at hadron colliders
Relativistic O(v^2) corrections to color-singlet fragmentation functions, especially for gluons, bring leading-power NRQCD predictions for prompt psi(2S) at high pT into agreement with LHC data without color-octet mat...
-
The role of the soft scale for $J/\psi$ production in the transverse momentum dependent framework
The paper derives new TMD soft transition functions and shows they dominate J/psi production at small transverse momentum by a factor of 1/v over previously used shape functions.
-
Quarkonium Parton Shower in Herwig 7
Herwig 7 gains a quarkonium parton shower using NRQCD factorisation with spin-colour projections, including singlet, octet and diquark channels.
-
$\psi(2S)$ production in jets using NRQCD
Applying NRQCD fragmenting jet functions and gluon-fragmentation-improved Pythia to psi(2S) in jets, the authors find that the LHCb data favor the Bodwin et al. LDME set and expose large tensions with other extractions.
-
Sivers Asymmetry in Photoproduction of $J/\psi$ and Jet at the EIC
Photoproduction of J/psi+jet at the EIC shows a gluon-dominated Sivers asymmetry of up to 6-8% in the models studied, making it a promising probe of the gluon Sivers function.
-
All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
TQ4Q2.0 supplies the first complete, uncertainty-quantified set of NRQCD-based fragmentation functions for all-heavy tetraquarks, including nonconstituent channels and public grids for jet-associated production.
-
Automatic Semantic Alignment of Flow Pattern Representations for Exploration with Large Language Models
A framework aligns flow pattern representations with LLM embeddings, enabling natural language queries for explorative flow visualization without manual labeling.
Discussion (0). Continue with ORCID to comment.