The nature of $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$

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Autori principali: Brambilla, Nora, Mohapatra, Abhishek, Scirpa, Tommaso, Vairo, Antonio
Natura: Preprint
Pubblicazione: 2024
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author Brambilla, Nora
Mohapatra, Abhishek
Scirpa, Tommaso
Vairo, Antonio
author_facet Brambilla, Nora
Mohapatra, Abhishek
Scirpa, Tommaso
Vairo, Antonio
contents Two decades ago the $χ_{c1}\left(3872\right)$ was discovered in the hadron spectrum with two heavy quarks. The discovery fueled a surge in experimental research, uncovering dozens of so called XYZ exotics states lying outside the conventional quark model, as well as theoretical investigations into new forms of matter, such as quark-gluon hybrids, tetraquarks, pentaquarks, with the potential of disclosing new information about the fundamental strong force. Among the XYZs, the $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$ stand out for their striking characteristics and unlashed many discussions about their nature. Here, we address this question using the Born--Oppenheimer Effective Field Theory (BOEFT) and show how QCD settles the issue of their composition. Not only we describe well the main features of the $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$ but obtain also predictions in the bottomonium sector. This opens the way to systematic applications of BOEFT to all XYZs.
format Preprint
id arxiv_https___arxiv_org_abs_2411_14306
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle The nature of $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$
Brambilla, Nora
Mohapatra, Abhishek
Scirpa, Tommaso
Vairo, Antonio
High Energy Physics - Phenomenology
High Energy Physics - Experiment
High Energy Physics - Lattice
Two decades ago the $χ_{c1}\left(3872\right)$ was discovered in the hadron spectrum with two heavy quarks. The discovery fueled a surge in experimental research, uncovering dozens of so called XYZ exotics states lying outside the conventional quark model, as well as theoretical investigations into new forms of matter, such as quark-gluon hybrids, tetraquarks, pentaquarks, with the potential of disclosing new information about the fundamental strong force. Among the XYZs, the $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$ stand out for their striking characteristics and unlashed many discussions about their nature. Here, we address this question using the Born--Oppenheimer Effective Field Theory (BOEFT) and show how QCD settles the issue of their composition. Not only we describe well the main features of the $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$ but obtain also predictions in the bottomonium sector. This opens the way to systematic applications of BOEFT to all XYZs.
title The nature of $χ_{c1}\left(3872\right)$ and $T_{cc}^+\left(3875\right)$
topic High Energy Physics - Phenomenology
High Energy Physics - Experiment
High Energy Physics - Lattice
url https://arxiv.org/abs/2411.14306