在\(B^{+}\to D^{*±}D^{∓}K^{+}\)衰变中对新的粲偶素或类粲偶素态的观测。
Observation of New Charmonium or Charmoniumlike States in B^{+}→D^{*±}D^{∓}K^{+} Decays.
作者信息
Aaij R, Abdelmotteleb A S W, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye A A, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala C A, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey J L, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back J J, Baladron Rodriguez P, Balagura V, Baldini W, Baptista de Souza Leite J, Barbetti M, Barbosa I R, Barlow R J, Barsuk S, Barter W, Bartolini M, Bartz J, Baryshnikov F, Basels J M, Bassi G, Batsukh B, Battig A, Bay A, Beck A, Becker M, Bedeschi F, Bediaga I B, Beiter A, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertella C, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko Ia, Bhom J, Bieker M S, Biesuz N V, Billoir P, Biolchini A, Birch M, Bishop F C R, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank J E, Blusk S, Bocharnikov V, Boelhauve J A, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani C S, Bolzonella R, Bondar N, Borgato F, Borghi S, Borsato M, Borsuk J T, Bouchiba S A, Bowcock T J V, Boyer A, Bozzi C, Bradley M J, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonaura A, Buonincontri L, Burke A T, Burr C, Bursche A, Butkevich A, Butter J S, Buytaert J, Byczynski W, Cadeddu S, Cai H, Calabrese R, Calefice L, Cali S, Calvi M, Calvo Gomez M, Cambon Bouzas J I, Campana P, Campora Perez D H, Campoverde Quezada A F, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Castro Godinez J, Cattaneo M, Cavallero G, Cavallini V, Celani S, Cerasoli J, Cervenkov D, Cesare S, Chadwick A J, 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机构信息
Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
Department of Physics, University of Warwick, Coventry, United Kingdom.
出版信息
Phys Rev Lett. 2024 Sep 27;133(13):131902. doi: 10.1103/PhysRevLett.133.131902.
A study of resonant structures in B^{+}→D^{+}D^{-}K^{+} and B^{+}→D^{-}D^{+}K^{+} decays is performed, using proton-proton collision data at center-of-mass energies of sqrt[s]=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^{-1}. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D^{-}D^{+} and D^{+}D^{-} states linked by C parity. This procedure allows the C parities of resonances in the D^{±}D^{∓} mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into D^{±}D^{∓}: η_{c}(3945), h_{c}(4000), χ_{c1}(4010), and h_{c}(4300), with quantum numbers J^{PC} equal to 0^{-+}, 1^{+-}, 1^{++}, and 1^{+-}, respectively. At least three of these states have not been observed previously. In addition, the existence of the T_{c[over ¯]s[over ¯]0}^{}(2870)^{0} and T_{c[over ¯]s[over ¯]1}^{}(2900)^{0} resonances in the D^{-}K^{+} mass spectrum, already observed in the B^{+}→D^{+}D^{-}K^{+} decay, is confirmed in a different production channel.
利用大型强子对撞机底夸克实验（LHCb实验）记录的质心能量为(\sqrt{s}=7)、(8)和(13) TeV的质子-质子碰撞数据（对应积分亮度为(9,\text{fb}^{-1})），对(B^{+}\to D^{+}D^{-}K^{+})和(B^{+}\to D^{-}D^{+}K^{+})衰变中的共振结构进行了研究。对这两个通道进行了同时振幅拟合，其中共振衰变到由C宇称联系的(D^{-}D^{+})和(D^{+}D^{-})态有贡献。该过程允许确定(D^{±}D^{∓})质谱中共振的C宇称。观察到四个粲偶素或类粲偶素态衰变为(D^{±}D^{∓})：(\eta_{c}(3945))、(h_{c}(4000))、(\chi_{c1}(4010))和(h_{c}(4300))，其量子数(J^{PC})分别等于(0^{-+})、(1^{+-})、(1^{++})和(1^{+-})。这些态中至少有三个以前未被观察到。此外，在(B^{+}\to D^{+}D^{-}K^{+})衰变中已观察到的(D^{-}K^{+})质谱中的(T_{c\bar{s}0}^{}(2870)^{0})和(T_{c\bar{s}1}^{}(2900)^{0})共振，在不同的产生通道中得到了证实。
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