Amplitude analysis and branching fraction measurement of $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ decays

Author:

,Aaij R.,Abdelmotteleb A. S. W.,Abellan Beteta C.,Abudinén F.,Ackernley T.,Adams J. A.,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.,Bao H.,Baptista de Souza Leite J.,Barbetti M.,Barbosa I. R.,Barlow R. J.,Barnyakov M.,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.,Belin S.,Bellee V.,Belous K.,Belov I.,Belyaev I.,Benane G.,Bencivenni G.,Ben-Haim E.,Berezhnoy A.,Bernet R.,Bernet Andres S.,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.,Butkevich A.,Butter J. S.,Buytaert J.,Byczynski W.,Cadeddu S.,Cai H.,Calabrese R.,Calderon Ramirez S.,Calefice L.,Cali S.,Calvi M.,Calvo Gomez M.,Cambon Bouzas J.,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.,Cervenkov D.,Cesare S.,Chadwick A. J.,Chahrour I.,Charles M.,Charpentier Ph.,Chavez Barajas C. A.,Chefdeville M.,Chen C.,Chen S.,Chen Z.,Chernov A.,Chernyshenko S.,Chobanova V.,Cholak S.,Chrzaszcz M.,Chubykin A.,Chulikov V.,Ciambrone P.,Cid Vidal X.,Ciezarek G.,Cifra P.,Clarke P. E. L.,Clemencic M.,Cliff H. V.,Closier J.,Cocha Toapaxi C.,Coco V.,Cogan J.,Cogneras E.,Cojocariu L.,Collins P.,Colombo T.,Comerma-Montells A.,Congedo L.,Contu A.,Cooke N.,Corredoira I.,Correia A.,Corti G.,Cottee Meldrum J. J.,Couturier B.,Craik D. C.,Cruz Torres M.,Curras Rivera E.,Currie R.,Da Silva C. L.,Dadabaev S.,Dai L.,Dai X.,Dall’Occo E.,Dalseno J.,D’Ambrosio C.,Daniel J.,Danilina A.,d’Argent P.,Davidson A.,Davies J. E.,Davis A.,De Aguiar Francisco O.,De Angelis C.,de Boer J.,De Bruyn K.,De Capua S.,De Cian M.,De Freitas Carneiro Da Graca U.,De Lucia E.,De Miranda J. M.,De Paula L.,De Serio M.,De Simone P.,De Vellis F.,de Vries J. A.,Debernardis F.,Decamp D.,Dedu V.,Del Buono L.,Delaney B.,Dembinski H.-P.,Deng J.,Denysenko V.,Deschamps O.,Dettori F.,Dey B.,Di Nezza P.,Diachkov I.,Didenko S.,Ding S.,Dittmann L.,Dobishuk V.,Docheva A. D.,Dong C.,Donohoe A. M.,Dordei F.,dos Reis A. C.,Dowling A. D.,Duan W.,Duda P.,Dudek M. W.,Dufour L.,Duk V.,Durante P.,Duras M. M.,Durham J. M.,Durmus O. D.,Dziurda A.,Dzyuba A.,Easo S.,Eckstein E.,Egede U.,Egorychev A.,Egorychev V.,Eisenhardt S.,Ejopu E.,Ek-In S.,Eklund L.,Elashri M.,Ellbracht J.,Ely S.,Ene A.,Epple E.,Eschle J.,Esen S.,Evans T.,Fabiano F.,Falcao L. N.,Fan Y.,Fang B.,Fantini L.,Faria M.,Farmer K.,Fazzini D.,Felkowski L.,Feng M.,Feo M.,Fernandez Gomez M.,Fernez A. 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Abstract

Abstract The decays of the B+ meson to the final state $$ {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ D D s + π + are studied in proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb1. The ratio of branching fractions of the $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ B + D D s + π + and $$ {B}^0\to {D}^{\ast -}{D}_s^{+} $$ B 0 D D s + decays is measured to be 0.173 ± 0.006 ± 0.010, where the first uncertainty is statistical and the second is systematic. Using partially reconstructed $$ {D}_s^{\ast +}\to {D}_s^{+}\gamma $$ D s + D s + γ and $$ {D}_s^{+}{\pi}^0 $$ D s + π 0 decays, the ratio of branching fractions between the $$ {B}^{+}\to {D}^{\ast -}{D}_s^{\ast +}{\pi}^{+} $$ B + D D s + π + and $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ B + D D s + π + decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ B + D D s + π + decay is performed for the first time, revealing dominant contributions from known excited charm resonances decaying to the D*π+ final state. No significant evidence of exotic contributions in the $$ {D}_s^{+}{\pi}^{+} $$ D s + π + or $$ {D}^{\ast -}{D}_s^{+} $$ D D s + channels is found. The fit fraction of the scalar state $$ {T}_{c\overline{s}0}^{\ast }{(2900)}^{++} $$ T c s ¯ 0 2900 + + observed in the $$ {B}^{+}\to {D}^{-}{D}_s^{+}{\pi}^{+} $$ B + D D s + π + decay is determined to be less than 2.3% at a 90% confidence level.

Publisher

Springer Science and Business Media LLC

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