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Author  |
Albaladejo, M.; Feijoo, A.; Nieves, J.; Oset, E.; Vidaña, I. |
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Title |
Femtoscopy correlation functions and mass distributions from production experiments |
Type |
Journal Article |
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Year |
2024 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
110 |
Issue |
11 |
Pages |
114052 - 21pp |
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Abstract |
We discuss the relation between the Koonin-Pratt femtoscopic correlation function (CF) and invariant mass distributions from production experiments. We show that the equivalence is total for a zero source-size and that a Gaussian finite-size source provides a form-factor for the virtual production of the particles. Motivated by this remarkable relationship, we study an alternative method to the Koonin-Pratt formula, which connects the evaluation of the CF directly with the production mechanisms. The differences arise mostly from the T-matrix quadratic terms and increase with the source size. We study the case of the (DD)-D-0*(+) and D+D*(0) correlation functions of interest to unravel the dynamics of the exotic T-cc (3875)(+), and find that these differences become quite sizable already for 1 fm sources. We nevertheless conclude that the lack of coherence in high-multiplicity-event reactions and in the creation of the fire-ball source that emits the hadrons certainly make much more realistic the formalism based on the Koonin-Pratt equation. We finally derive an improved Lednicky-Lyuboshits (LL) approach, which implements a Lorentz ultraviolet regulator that corrects the pathological behavior of the LL CF in the punctual source-size limit. |
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Address |
[Albaladejo, M.; Nieves, J.] Univ Valencia CSIC, Inst Fis Corpuscular, Inst Invest Paterna, Ctr Mixto, E-46071 Valencia, Spain, Email: Miguel.Albaladejo@ific.uv.es; |
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Publisher |
Amer Physical Soc |
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Language |
English |
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Original Title |
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Series Volume |
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Edition |
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ISSN |
2470-0010 |
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Notes |
WOS:001421795000013 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6537 |
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