@article{efc50ec5c19a45d6b560a77b095dda4a,
title = "Study of the doubly charmed tetraquark Tcc+",
abstract = "Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D0D0π+ mass spectrum just below the D*+D0 mass threshold produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The state is consistent with the ground isoscalar Tcc+ tetraquark with a quark content of c c u ¯ d ¯ and spin-parity quantum numbers JP = 1+. Study of the DD mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell D*+ mesons is consistent with the observed D0π+ mass distribution. To analyse the mass of the resonance and its coupling to the D*D system, a dedicated model is developed under the assumption of an isoscalar axial-vector Tcc+ state decaying to the D*D channel. Using this model, resonance parameters including the pole position, scattering length, effective range and compositeness are determined to reveal important information about the nature of the Tcc+ state. In addition, an unexpected dependence of the production rate on track multiplicity is observed.",
author = "R. Aaij and Abdelmotteleb, \{A. S.W.\} and Beteta, \{C. Abell{\'a}n\} and Gallego, \{F. J.Abudinen\} and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and C. Agapopoulou and Aidala, \{C. A.\} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and Albero, \{A. Alfonso\} and Z. Aliouche and G. Alkhazov and Cartelle, \{P. Alvarez\} and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and Rodriguez, \{P. Baladron\} and V. Balagura and W. Baldini and Leite, \{J. Baptista\} and M. Barbetti and Barlow, \{R. J.\} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and Basels, \{J. M.\} and S. Bashir and G. Bassi and B. Batsukh and A. Battig and A. Bay and A. Beck and M. Becker and F. Bedeschi and I. Bediaga and A. Beiter and V. Belavin and S. Belin and V. Bellee and K. Belous and I. Belov and I. Belyaev and G. Bencivenni and E. Ben-Haim and A. Berezhnoy and R. Bernet and D. Berninghoff and Bernstein, \{H. C.\} and C. Bertella and A. Bertolin and C. Betancourt and F. Betti and Ia Bezshyiko and S. Bhasin and J. Bhom and L. Bian and Bieker, \{M. S.\} and S. Bifani and P. Billoir and M. Birch and Bishop, \{F. C.R.\} and A. Bitadze and A. Bizzeti and M. Bj{\o}rn and Blago, \{M. P.\} and T. Blake and F. Blanc and S. Blusk and D. Bobulska and Boelhauve, \{J. A.\} and Garcia, \{O. Boente\} and T. Boettcher and A. Boldyrev and A. Bondar and N. Bondar and S. Borghi and M. Borisyak and M. Borsato and Borsuk, \{J. T.\} and Bouchiba, \{S. A.\} and Bowcock, \{T. J.V.\} and A. Boyer and C. Bozzi and Bradley, \{M. J.\} and S. Braun and Rodriguez, \{A. Brea\} and J. Brodzicka and Gonzalo, \{A. Brossa\} and D. Brundu and A. Buonaura and L. Buonincontri and Burke, \{A. T.\} and C. Burr and A. 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Vilasis-Cardona and Figueras, \{E. Vilella\} and A. Villa and P. Vincent and Volle, \{F. C.\} and Bruch, \{D. Vom\} and A. Vorobyev and V. Vorobyev and N. Voropaev and K. Vos and R. Waldi and J. Walsh and C. Wang and J. Wang and J. Wang and J. Wang and J. Wang and M. Wang and R. Wang and Y. Wang and Z. Wang and Z. Wang and Z. Wang and Ward, \{J. A.\} and Watson, \{N. K.\} and Weber, \{S. G.\} and D. Websdale and C. Weisser and Westhenry, \{B. D.C.\} and White, \{D. J.\} and M. Whitehead and Wiederhold, \{A. R.\} and D. Wiedner and G. Wilkinson and M. Wilkinson and I. Williams and M. Williams and Williams, \{M. R.J.\} and Wilson, \{F. F.\} and W. Wislicki and M. Witek and L. Witola and Wotton, \{S. A.\} and Wotton, \{S. A.\} and H. Wu and K. Wyllie and Z. Xiang and D. Xiao and Y. Xie and A. Xu and J. Xu and L. Xu and M. Xu and Q. Xu and Z. Xu and Z. Xu and D. Yang and S. Yang and Y. Yang and Z. Yang and Z. Yang and Y. Yao and Yeomans, \{L. E.\} and H. Yin and J. Yu and X. Yuan and O. Yushchenko and E. Zaffaroni and M. Zavertyaev and M. Zdybal and O. Zenaiev and M. Zeng and D. Zhang and L. Zhang and S. Zhang and S. Zhang and Y. Zhang and Y. Zhang and A. Zharkova and A. Zhelezov and Y. Zheng and T. Zhou and X. Zhou and Y. Zhou and V. Zhovkovska and X. Zhu and X. Zhu and Z. Zhu and V. Zhukov and Zonneveld, \{J. B.\} and Q. Zou and S. Zucchelli and D. Zuliani and G. Zunica and \{LHCb Collaboration\}",
note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",
year = "2022",
doi = "10.1038/s41467-022-30206-w",
language = "English",
volume = "13",
pages = "1--19",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Research",
}