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3. First characterization of a novel grain calorimeter: the GRAiNITA prototype

Author

Barsuk, Sergey, Bezshyyko, Oleg, Boyarintseva, Ianina, Boyarintsev, Andrey, Breton, Dominique, Chanal, Hervé, Dubovik, Alexander M., Kotenko, Andrii, Hull, Giulia, Lefrançois, Jacques, Monteil, Stéphane, Schune, Marie-Hélène, Semkiv, Nazar, Tupitsyna, Irina, and Yeresko, Mykhailo

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

A novel type of calorimeter based on grains of inorganic scintillating crystal readout by wave length shifting fibers is proposed. The concept and main features as well as the prototype design are introduced and the first results obtained using cosmic rays are presented. The number of photo-electrons generated by cosmic rays muons in the prototype detector is estimated to be of the order of 10000 photo-electrons per GeV, validating the concept of this next-generation shashlik calorimeter., Comment: 11 pages, 7 figures

Published
2023
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4. Financial Education as a Social Studies Discipline: The Equivocality of the Critical Aspirations Found in Québec's Curriculum and Its Educational Materials

Author

Lefrançois, David, Éthier, Marc-André, Cambron-Prémont, Amélie, and Larocque, Stéphanie

Abstract

Purpose: In 2017, the Government of Québec made a high school financial education course compulsory. Anchored in the social studies, it tackles themes like consumer rights, savings, and employment. This paper strives to understand the types of citizenship education they promote. Design/methodology/approach: Our research is based on a content analysis of Québec's financial education curriculum and its textbooks. Findings: This paper reveals that Ministry approved educational materials focus on issues of personal finance and information retrieval tasks at the expense of a critical approach and tasks of a higher intellectual value. Québec's financial education materials therefore seems to foster personally responsible citizens. Research limitations/implications: To understand the use teachers and students make of financial education materials, we must now conduct individual and group interviews with teachers and students, but mostly authentic classroom observations.

Published
2023

7. Planar parallel phonon Hall effect and local symmetry breaking

Author

Barthélemy, Quentin, Lefrançois, Étienne, Chen, Lu, Vallipuram, Ashvini, Zoch, Katharina M., Krellner, Cornelius, Puphal, Pascal, and Taillefer, Louis

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

Y-kapellasite [Y3Cu9(OH)19Cl8] is a frustrated antiferromagnetic insulator which remains paramagnetic down to a remarkably low N\'eel temperature of about 2 K. Having studied this material in the paramagnetic regime, in which phonons are the only possible heat carriers, we report the observation of a planar parallel thermal Hall effect coming unambiguously from phonons. This is an advantage over the Kitaev quantum spin liquid candidates {\alpha}-RuCl3 and Na2Co2TeO6 where in principle other heat carriers can be involved [1-4]. As it happens, Y-kapellasite undergoes a structural transition attributed to the positional freezing of a hydrogen atom below about 33 K. Above this transition, the global crystal symmetry forbids the existence of a planar parallel signal - the same situation as in Na2Co2TeO6 and cuprates [3-5]. This points to the notion of a local symmetry breaking at the root of the phonon Hall effect. In this context, the advantage of Y-kapellasite over Na2Co2TeO6 (with high levels of Na disorder and stacking faults) and cuprates (with high levels of disorder coming from dopants and oxygen vacancies) is its clean structure, where the only degree of freedom available for local symmetry breaking is this hydrogen atom randomly distributed over six equivalent positions above 33 K. This provides a specific and concrete case for the general idea of local symmetry breaking leading to the phonon Hall effect in a wide range of insulators., Comment: 16 pages, 4 figures, 3 tables

Published
2023

8. Planar thermal Hall effect from phonons in a Kitaev candidate material

Author

Chen, Lu, Lefrançois, Étienne, Vallipuram, Ashvini, Barthélemy, Quentin, Ataei, Amirreza, Yao, Wailing, Li, Yuan, and Taillefer, Louis

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

Kitaev materials are a promising platform for the realization of quantum spin liquid states. The thermal Hall effect has emerged as a potential probe of exotic excitations within such states. In the Kitaev candidate material $\alpha$-RuCl$_{3}$, however, the thermal Hall conductivity $\kappa_{xy}$ has been attributed not only to exotic Majorana fermions or chiral magnons, but also to phonons. It has been shown theoretically that the former two types of heat carriers can generate a "planar" thermal Hall effect, whereby the magnetic field is parallel to the heat current, as observed experimentally, but it is unknown whether phonons also could. Here we show that a planar thermal Hall effect is present in another Kitaev candidate material, Na$_{2}$Co$_{2}$TeO$_{6}$. On the basis of a striking similarity between the temperature and field dependence of $\kappa_{xy}$ and that of the phonon-dominated thermal conductivity $\kappa_{xx}$, we argue that the planar thermal Hall effect in Na$_{2}$Co$_{2}$TeO$_{6}$ is generated by phonons. The phonon contributed planar $\kappa_{xy}$ also shows a strong sample dependence, which indicates an extrinsic origin of the mechanism. By conducting a complete study with different in-plane configurations of heat current $J$ and magnetic field $H$, $i.e.$ $H$ $\|$ $J$ and $H$ $\bot$ $J$, we observe a large difference in $\kappa_{xy}$ between these two configurations, which reveals that the direction of the heat current $J$ may play an important role in determining the planar thermal Hall effect. Our observation calls for a re-evaluation of the planar thermal Hall effect observed in $\alpha$-RuCl$_{3}$.

Published
2023
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9. Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator TmVO$_{4}$

Author

Vallipuram, Ashvini, Chen, Lu, Campillo, Emma, Mezidi, Manel, Grissonnanche, Gaël, Boulanger, Marie-Eve, Lefrançois, Étienne, Zic, Mark P., Li, Yuntian, Fisher, Ian R., Baglo, Jordan, and Taillefer, Louis

Subjects
Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons
Abstract

In a growing number of materials, phonons have been found to generate a thermal Hall effect, but the underlying mechanism remains unclear. Inspired by previous studies that revealed the importance of Tb$^{3+}$ ions in generating the thermal Hall effect in a family of pyrochlores, we investigated the role of Tm$^{3+}$ ions in TmVO$_{4}$, a paramagnetic insulator with a different crystal structure. We observe a negative thermal Hall conductivity in TmVO$_{4}$ with a magnitude such that the Hall angle, $|\kappa_{xy}$/$\kappa_{xx}|$, is approximately 1 x 10$^{-3}$ at $H$ = 15 T and $T$ = 20 K, typical for a phonon-generated thermal Hall effect. In contrast to the negligible $\kappa_{xy}$ found in the nonmagnetic pyrochlore analog (where the Tb$^{3+}$ ions are replaced with Y$^{3+}$), we observe a negative $\kappa_{xy}$ in YVO$_{4}$ with a Hall angle of magnitude comparable to that of TmVO$_{4}$. This shows that the Tm$^{3+}$ ions are not essential for the thermal Hall effect in this family of materials. Interestingly, at an intermediate Y concentration of $x$ = 0.3 in Tm$_{1-x}$Y$_{x}$VO$_{4}$, $\kappa_{xy}$ was found to have a positive sign, pointing to the importance of impurities in the thermal Hall effect of phonons., Comment: Figures modified and added, authors added, appendix added

Published
2023
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14. Practical epistemology of history teachers and its relationship to normative injunctions

Author

Charles-Antoine Bachand, Stéphanie Demers, Marc-André Éthier, and David Lefrançois

Subjects
History (General), D1-2009
Abstract

Over the past few decades, significant work has been done regarding the epistemic beliefs of history teachers. However, nuanced epistemic beliefs do not appear to manifest as regularly as may be expected in teaching practices (Wilke et al., 2022). While exploring the normative injunctions imposed in part by the hidden curriculum (Giroux & Penna, 1979), the “school form” (Barthes & Alpe, 2018), and the challenges that history teachers face, this article argues that explicit and implicit demands made on history teachers generate a form of practical epistemology, which goes beyond epistemological beliefs. While at times this appears at odds with their understanding of history as a discipline, it enables them to meet the diverse mandates and directives they encounter. We believe that the concept of practical epistemology (Gholami, 2017) provides avenues for reflection that deserve to be pursued. Lastly, regarding criterialist epistemology (Maggioni, VanSledright, & Alexander, 2009) and historical thinking (Seixas & Morton, 2013), we emphasize that they themselves could be subjected to a critical review by both students and teachers in their practice.

Published
2024
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15. Impurity-induced phonon thermal Hall effect in the antiferromagnetic phase of Sr2IrO4

Author

Ataei, Amirreza, Grissonnanche, Gael, Boulanger, Marie-Eve, Chen, Lu, Lefrancois, Etienne, Brouet, Veronique, and Taillefer, Louis

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

A thermal Hall effect is observed in an increasing number of insulators often attributed to phonons, but the underlying mechanism is in most cases unknown. A coupling of phonons to spins has been invoked and scattering of phonons by impurities or defects has been proposed, but there is no systematic evidence to support either scenario. Here we present a study on the effect of adding Rh impurities to the antiferromagnetic insulator Sr2IrO4, substituting for the spin-carrying Ir atoms. We find that adding small concentrations of Rh impurities increases the thermal Hall conductivity dramatically, but adding enough Rh to suppress the magnetic order eventually decreases the thermal Hall conductivity until it nearly vanishes. We conclude that the thermal Hall effect in this material is caused by the scattering of phonons by impurities embedded within a magnetic environment.

Published
2023
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16. Oscillations in the magnetothermal conductivity of $\boldsymbol{\alpha}$-RuCl$_3$: Evidence of transition anomalies

Author

Lefrançois, Étienne, Baglo, Jordan, Barthélemy, Quentin, Kim, Subin, Kim, Young-June, and Taillefer, Louis

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

The 2D layered insulator $\alpha$-RuCl$_3$ is a candidate material for a quantum spin-liquid state, which may be realized when a magnetic field suppresses the antiferromagnetic order present at low temperature. Oscillations in the field dependence of the thermal conductivity, observed for an in-plane magnetic field $B$ up to a critical field $B^{\star}$, have been attributed to exotic charge-neutral fermions, viewed as evidence of a quantum spin-liquid state between the critical field $B_{c}$ $\simeq 7$ T at which the antiferromagnetic phase ends and $B^{\star}$. Here we report measurements of the thermal conductivity of $\alpha$-RuCl$_3$ as a function of magnetic field up to 15 T applied in two distinct in-plane directions: parallel and perpendicular to the Ru-Ru bond. We find that the number of oscillations between $B_{c}$ and $B^{\star}$ is the same for the two field directions even though the field interval between $B_{c}$ and $B^{\star}$ is different. In other words, the period of the oscillations is controlled by the transition fields $B_{c}$ and $B^{\star}$. We conclude that these are not true oscillations -- coming from putative fermions in a spin-liquid state -- but anomalies associated with a sequence of magnetic transitions., Comment: 7 pages, 8 figures

Published
2023
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17. Exploring children’s despair in the face of climate change

Author

Catherine Malboeuf-Hurtubise, David Lefrançois, Marc-André Éthier, Jonathan Smith, Terra Léger-Goodes, and Catherine M. Herba

Subjects
Psychology, BF1-990, Social Sciences
Abstract

Interventions targeting children’s eco-anxiety have focused on fostering hope, however this is disconnected from children’s need to explore and express despair regarding the climate crisis. Adults can help by acknowledging and discussing these emotions with children.

Published
2024
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18. Heat conduction in herbertsmithite: field dependence at the onset of the quantum spin liquid regime

Author

Barthélemy, Q., Lefrançois, É., Baglo, J., Bourgeois-Hope, P., Chatterjee, D., Lefloïc, P., Velázquez, M., Balédent, V., Bernu, B., Doiron-Leyraud, N., Bert, F., Mendels, P., and Taillefer, L.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

We report thermal conductivity measurements on single crystals of herbertsmithite, over a wide range of temperatures (0.05-120 K) in magnetic fields up to 15 T. We also report measurements of the thermal Hall effect, found to be vanishingly small. At high temperatures, in the paramagnetic regime, the thermal conductivity has a negligible field dependence. Upon cooling and the development of correlations, the onset of a clear monotonic field dependence below about 20 K signals a new characteristic temperature scale that may reflect the subtle crossover towards the quantum spin liquid regime. Deconfined spinons, if present, are not detected and phonons, as the main carriers of heat, are strongly scattered by the intrinsic spin excitations and the magnetic defects. In view of the colossal fields required to affect the intrinsic spins, most of the field-induced evolution is attributed to the progressive polarization of some magnetic defects. By elaborating a phenomenological model, we extract the magnetization of these main scattering centers which does not resemble the Brillouin function for free spins 1/2, requiring to go beyond the paradigm of isolated paramagnetic spins. Besides, the onset of a nonmonotonic field dependence below about 2 K underlines the existence of another characteristic temperature scale, previously highlighted with other measurements, and sheds new light on the phase diagram of herbertsmithite down to the lowest temperatures., Comment: 14 pages, 7 figures

Published
2022
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20. Planar thermal Hall effect from phonons in a Kitaev candidate material

Author

Lu Chen, Étienne Lefrançois, Ashvini Vallipuram, Quentin Barthélemy, Amirreza Ataei, Weiliang Yao, Yuan Li, and Louis Taillefer

Subjects
Science
Abstract

Abstract The thermal Hall effect has emerged as a potential probe of exotic excitations in spin liquids. In the Kitaev magnet $${{\alpha }}$$ α -RuCl3, the thermal Hall conductivity $${{{\kappa }}}_{{{xy}}}$$ κ x y has been attributed to Majorana fermions, chiral magnons, or phonons. Theoretically, the former two types of heat carriers can generate a “planar” $${{{\kappa }}}_{{{xy}}}$$ κ x y , whereby the magnetic field is parallel to the heat current, but it is unknown whether phonons also could. Here we show that a planar $${{{\kappa }}}_{{{xy}}}$$ κ x y is present in another Kitaev candidate material, Na2Co2TeO6. Based on the striking similarity between $${{{\kappa }}}_{{{xy}}}$$ κ x y and the phonon-dominated thermal conductivity $${{{\kappa }}}_{{{xx}}}$$ κ x x , we attribute the effect to phonons. We observe a large difference in $${{{\kappa }}}_{{{xy}}}$$ κ x y between different configurations of heat current and magnetic field, which reveals that the direction of heat current matters in determining the planar $${{{\kappa }}}_{{{xy}}}$$ κ x y . Our observation calls for a re-evaluation of the planar $${{{\kappa }}}_{{{xy}}}$$ κ x y observed in $$\,{{\alpha }}$$ α -RuCl3.

Published
2024
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21. Content negotiation on the Web: State of the art

Author

Taghzouti, Yousouf, Zimmermann, Antoine, and Lefrançois, Maxime

Subjects
Computer Science - Information Retrieval
Abstract

The openness and accessibility of the Web has contributed greatly to its worldwide adoption. Uniform Resource Identifiers (URIs) are used for resource identification on the Web. A resource on the Web can be described in many ways, which makes it difficult for a user to find an adequate representation. This situation has motivated fruitful research on content negotiation to satisfy user requirements efficiently and effectively. We focus on the important topic of content negotiation, and our goal is to present the first comprehensive state of the art. Our contributions include (1) identifying the characteristics of content negotiation scenarios (styles, dimensions, and means of conveying constraints), (2) comparing and classifying existing contributions, (3) identifying use cases that the current state of content negotiation struggles to address, (4) suggesting research directions for future work. The results of the state of the art show that the problem of content negotiation is relevant and far from being solved.

Published
2022

22. Thermal Hall conductivity of electron-doped cuprates

Author

Boulanger, Marie-Eve, Grissonnanche, Gaël, Lefrançois, Étienne, Gourgout, Adrien, Xu, Ke-Jun, Shen, Zhi-Xun, Greene, Richard L., and Taillefer, Louis

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

Measurements of the thermal Hall conductivity in hole-doped cuprates have shown that phonons acquire chirality in a magnetic field, both in the pseudogap phase and in the Mott insulator state. The microscopic mechanism at play is still unclear. A number of theoretical proposals are being considered, including skew scattering of phonons by various defects, the coupling of phonons to spins, and a state of loop-current order with the appropriate symmetries, but more experimental information is required to constrain theoretical scenarios. Here we present our study of the thermal Hall conductivity $\kappa_{\rm {xy}}$ in the electron-doped cuprates Nd$_{2-x}$Ce$_x$CuO$_4$ and Pr$_{2-x}$Ce$_x$CuO$_4$, for dopings across the phase diagram, from $x$ = 0, in the insulating antiferromagnetic phase, up to $x$ = 0.17, in the metallic phase above optimal doping. We observe a large negative thermal Hall conductivity at all dopings, in both materials. Since heat conduction perpendicular to the CuO$_2$ planes is dominated by phonons, the large thermal Hall conductivity we observe in electron-doped cuprates for a heat current in that direction must also be due to phonons, as in hole-doped cuprates. Measurements with a heat current perpendicular to the CuO$_2$ planes confirm that phonons are responsible for this thermal Hall signal, as in hole-doped cuprates. However, the degree of chirality, measured as the ratio $|\kappa_{\rm {xy}}$ / $\kappa_{\rm {xx}} |$, where $\kappa_{\rm {xx}}$ is the longitudinal thermal conductivity, is much larger in the electron-doped cuprates. We discuss various factors that may be involved in the mechanism that confers chirality to phonons in cuprates, including short-range spin correlations., Comment: 10 pages, 9 figures

Published
2021
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23. Evidence of a Phonon Hall Effect in the Kitaev Spin Liquid Candidate $\alpha$-RuCl$_3$

Author

Lefrançois, É., Grissonnanche, G., Baglo, J., Lampen-Kelley, P., Yan, J., Balz, C., Mandrus, D., Nagler, S. E., Kim, S., Kim, Young-June, Doiron-Leyraud, N., and Taillefer, L.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

The material $\alpha$-RuCl$_3$ has been the subject of intense scrutiny as a potential Kitaev quantum spin liquid, predicted to display Majorana fermions as low energy excitations. In practice, $\alpha$-RuCl$_3$ undergoes a transition to a state with antiferromagnetic order below a temperature $T_{\rm N}$ $\approx$ 7 K, but this order can be suppressed by applying an external in-plane magnetic field of $H_\parallel$ = 7 T. Whether a quantum spin liquid phase exists just above that field is still an open question, but the reported observation of a quantized thermal Hall conductivity at $H_\parallel$ $>$ 7 T by Kasahara and co-workers $\big[$Kasahara ${\it et \ al}$., Nature ${\bf 559}$, 227 (2018)$\big]$ has been interpreted as evidence of itinerant Majorana fermions in the Kitaev quantum spin liquid state. In this study, we re-examine the origin of the thermal Hall conductivity $\kappa_{\rm xy}$ in $\alpha$-RuCl$_3$. Our measurements of $\kappa_{\rm xy}$($T$) on several different crystals yield a temperature dependence very similar to that of the phonon-dominated longitudinal thermal conductivity $\kappa_{\rm xx}$($T$), for which the natural explanation is that $\kappa_{\rm xy}$ is also mostly carried by phonons. Upon cooling, $\kappa_{\rm xx}$ peaks at $T \simeq$ 20 K, then drops until $T_{\rm N}$, whereupon it suddenly increases again. The abrupt increase below $T_{\rm N}$ is attributed to a sudden reduction in the scattering of phonons by low-energy spin fluctuations as these become partially gapped when the system orders. The fact that $\kappa_{\rm xy}$ also increases suddenly below $T_{\rm N}$ is strong evidence that the thermal Hall effect in $\alpha$-RuCl$_3$ is also carried predominantly by phonons. This implies that any quantized signal from Majorana edge modes would have to come on top of a sizable -- and sample-dependent -- phonon background., Comment: 6 pages, 3 figures

Published
2021
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26. Small grains from Ryugu: handling and analysis pipeline for infrared synchrotron microspectroscopy

Author

Rubino, Stefano, Dionnet, Zélia, Aléon-Toppani, Alice, Brunetto, Rosario, Nakamura, Tomoki, Baklouti, Donia, Djouadi, Zahia, Lantz, Cateline, Mivumbi, Obadias, Borondics, Ferenc, Lefrançois, Stephane, Sandt, Christophe, Capitani, Francesco, Héripré, Eva, Troadec, David, Matsumoto, Megumi, Amano, Kana, Morita, Tomoyo, Yurimoto, Hisayoshi, Noguchi, Takaaki, Okazaki, Ryuji, Yabuta, Hikaru, Naraoka, Hiroshi, Sakamoto, Kanako, Tachibana, Shogo, Watanabe, Seiichiro, and Tsuda, Yuichi

Published
2023
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27. Clinical and Molecular Features of Morpheaform Basal Cell Carcinoma: A Systematic Review

Author

Santina Conte, Sarah Ghezelbash, Bonika Nallanathan, and Philippe Lefrançois

Subjects
morpheaform basal cell carcinoma, sclerosing basal cell carcinoma, morphoeic basal cell carcinoma, fibrosing basal cell carcinoma, BCC, skin cancer, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Basal cell carcinoma (BCC) is the most common skin cancer, with a lifetime risk currently approaching up to 40% in Caucasians. Among these, some clinical and pathological BCC variants pose a higher risk due to their more aggressive biological behavior. Morpheaform BCC (morBCC), also known as sclerosing, fibrosing, or morpheic BCC, represents up to 5–10% of all BCC. Overall, morBCC carries a poorer prognosis due to late presentation, local tissue destruction, tumor recurrence, and higher frequency of metastasis. In this systematic review, we review the epidemiological, clinical, morphological, dermatoscopical, and molecular features of morBCC. After the title and abstract screening of 222 studies and the full-text review of 84 studies, a total of 54 studies met the inclusion criteria and were thus included in this review.

Published
2023
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28. One Health approach at the heart of the French Committee for monitoring and anticipating health risks

Author

Thierry Lefrançois, Bruno Lina, COVARS, and Brigitte Autran

Subjects
Science
Abstract

The French Committee for Monitoring and Anticipating Health Risks (COVARS) has been strengthening the One Health approach through its interdisciplinary and multi-sectoral composition, the emerging risks it addresses (Covid-19, Mpox, vector-borne diseases, avian influenza…), its holistic approach to risks and its position at the science-decision interface.

Published
2023
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29. Rational probe design for efficient rRNA depletion and improved metatranscriptomic analysis of human microbiomes

Author

Asako Tan, Senthil Murugapiran, Alaya Mikalauskas, Jeff Koble, Drew Kennedy, Fred Hyde, Victor Ruotti, Emily Law, Jordan Jensen, Gary P. Schroth, Jean M. Macklaim, Scott Kuersten, Brice LeFrançois, and Daryl M. Gohl

Subjects
Next-generation sequencing, Microbiome, Metatranscriptomics, rRNA depletion, Microbiology, QR1-502
Abstract

Abstract The microbiota that colonize the human gut and other tissues are dynamic, varying both in composition and functional state between individuals and over time. Gene expression measurements can provide insights into microbiome composition and function. However, efficient and unbiased removal of microbial ribosomal RNA (rRNA) presents a barrier to acquiring metatranscriptomic data. Here we describe a probe set that achieves efficient enzymatic rRNA removal of complex human-associated microbial communities. We demonstrate that the custom probe set can be further refined through an iterative design process to efficiently deplete rRNA from a range of human microbiome samples. Using synthetic nucleic acid spike-ins, we show that the rRNA depletion process does not introduce substantial quantitative error in gene expression profiles. Successful rRNA depletion allows for efficient characterization of taxonomic and functional profiles, including during the development of the human gut microbiome. The pan-human microbiome enzymatic rRNA depletion probes described here provide a powerful tool for studying the transcriptional dynamics and function of the human microbiome.

Published
2023
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30. Videoconference‐led art‐based interventions for children during COVID‐19: Comparing mindful mandala and emotion‐based drawings

Author

Terra Léger‐Goodes, Catherine Malboeuf‐Hurtubise, Catherine M. Herba, Geneviève Taylor, Geneviève A. Mageau, Nicholas Chadi, and David Lefrançois

Subjects
art therapy, child mental health, COVID‐19 pandemic, mindfulness‐based art therapy (MBAT), Mental healing, RZ400-408, Psychiatry, RC435-571
Abstract

Abstract Emerging evidence on the coronavirus disease 2019 (COVID‐19) pandemic suggests that children are experiencing a deterioration in mental health, namely, an increase in anxiety, depression, and hyperactivity symptoms. To address this rising issue, preventive strategies and mental health interventions need to be evaluated to help children in their school setting. Recent studies have suggested that art‐based interventions could increase children's well‐being and be easily implemented in schools. The goal of this study was to assess the effects of an emotion‐based directed drawing intervention, compared to a mandala drawing intervention, on elementary school children's (n = 165) mental health, in the context of the COVID‐19 pandemic. An experimental design was used to compare the effects of the two interventions on primary school students' anxiety, depression, and inattention symptoms. All drawing activities were led by an online facilitator, while children and teachers attended school in‐person. Mixed analyses of variance revealed a significant effect of time on students' levels of anxiety. Post hoc sensitivity analyses indicated that children from both groups reported lower levels of anxiety pre‐ to postintervention. Results from this study showed that, in the context of the COVID‐19 pandemic, both emotion‐based and mandala drawing interventions could improve certain mental health aspects of elementary school children, by reducing their anxiety levels. Informal evidence indicates that implementing these interventions online and remotely through a videoconferencing platform is feasible and well received by children and their teachers. Nevertheless, future studies should include an inactive control group, explore the acceptability of the intervention, and use longitudinal methods to better document if the positive impacts on mental health can be maintained through time.

Published
2023
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33. Skin Cancer Prevention across the G7, Australia and New Zealand: A Review of Legislation and Guidelines

Author

Santina Conte, Ammar Saed Aldien, Sébastien Jetté, Jonathan LeBeau, Sauliha Alli, Elena Netchiporouk, François Lagacé, Philippe Lefrançois, Lisa Iannattone, and Ivan V. Litvinov

Subjects
melanoma, skin cancer, sun protection, legislation, guidelines, G7, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Incidence rates of melanoma and keratinocyte skin cancers have been on the rise globally in recent decades. While there has been a select focus on personal sun protection awareness, to our knowledge, there is a paucity of legislation in place to help support citizens’ efforts to protect themselves from the harmful effects of ultraviolet radiation (UVR). Given this, we conducted a comprehensive review of legislation and guidelines pertaining to a variety of sun protection-related topics in countries of the Group of Seven (G7), Australia and New Zealand. Australia was the only country to have banned tanning beds for individuals of all ages, while other select countries have instituted bans for minors. In workplace policy, there is very little recognition of the danger of occupational UVR exposure in outdoor workers, and thus very few protective measures are in place. With regard to sports and recreation, certain dermatological/professional associations have put forward recommendations, but no legislation was brought forward by government bodies outside of Australia and New Zealand. With regard to youth, while there are various guidelines and frameworks in place across several countries, adherence remains difficult in the absence of concrete legislation and standardization of procedures. Finally, only Australia and a few select jurisdictions in the United States have implemented sales tax exemptions for sunscreen products. In light of our findings, we have made several recommendations, which we anticipate will help reduce the rates of melanoma and keratinocyte cancers in years to come. However, minimizing UVR exposure is not without risk, and we, therefore, suggest the promotion of vitamin D supplementation in conjunction with sun protective practices to limit potential harm.

Published
2023
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34. CNK2 promotes cancer cell motility by mediating ARF6 activation downstream of AXL signalling

Author

Guillaume Serwe, David Kachaner, Jessica Gagnon, Cédric Plutoni, Driss Lajoie, Eloïse Duramé, Malha Sahmi, Damien Garrido, Martin Lefrançois, Geneviève Arseneault, Marc K. Saba-El-Leil, Sylvain Meloche, Gregory Emery, and Marc Therrien

Subjects
Science
Abstract

Abstract Cell motility is a critical feature of invasive tumour cells that is governed by complex signal transduction events. Particularly, the underlying mechanisms that bridge extracellular stimuli to the molecular machinery driving motility remain partially understood. Here, we show that the scaffold protein CNK2 promotes cancer cell migration by coupling the pro-metastatic receptor tyrosine kinase AXL to downstream activation of ARF6 GTPase. Mechanistically, AXL signalling induces PI3K-dependent recruitment of CNK2 to the plasma membrane. In turn, CNK2 stimulates ARF6 by associating with cytohesin ARF GEFs and with a novel adaptor protein called SAMD12. ARF6-GTP then controls motile forces by coordinating the respective activation and inhibition of RAC1 and RHOA GTPases. Significantly, genetic ablation of CNK2 or SAMD12 reduces metastasis in a mouse xenograft model. Together, this work identifies CNK2 and its partner SAMD12 as key components of a novel pro-motility pathway in cancer cells, which could be targeted in metastasis.

Published
2023
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35. Temporal genome-wide fitness analysis of Mycobacterium marinum during infection reveals the genetic requirement for virulence and survival in amoebae and microglial cells

Author

Louise H. Lefrançois, Jahn Nitschke, Huihai Wu, Gaël Panis, Julien Prados, Rachel E. Butler, Tom A. Mendum, Nabil Hanna, Graham R. Stewart, and Thierry Soldati

Subjects
Mycobacterium marinum, phenotypic profiling, Dictyostelium discoideum, BV2 microglial cells, essentiality, Tn-Seq, Microbiology, QR1-502
Abstract

ABSTRACTTuberculosis remains the most pervasive infectious disease and the recent emergence of drug-resistant strains emphasizes the need for more efficient drug treatments. A key feature of pathogenesis, conserved between the human pathogen Mycobacterium tuberculosis and the model pathogen Mycobacterium marinum, is the metabolic switch to lipid catabolism and altered expression of virulence genes at different stages of infection. This study aims to identify genes involved in sustaining viable intracellular infection. We applied transposon sequencing (Tn-Seq) to M. marinum, an unbiased genome-wide strategy combining saturation insertional mutagenesis and high-throughput sequencing. This approach allowed us to identify the localization and relative abundance of insertions in pools of transposon mutants. Gene essentiality and fitness cost of mutations were quantitatively compared between in vitro growth and different stages of infection in two evolutionary distinct phagocytes, the amoeba Dictyostelium discoideum and the murine BV2 microglial cells. In the M. marinum genome, 57% of TA sites were disrupted and 568 genes (10.2%) were essential, which is comparable to previous Tn-Seq studies on M. tuberculosis and M. bovis. Major pathways involved in the survival of M. marinum during infection of D. discoideum are related to DNA damage repair, lipid and vitamin metabolism, the type VII secretion system (T7SS) ESX-1, and the Mce1 lipid transport system. These pathways, except Mce1 and some glycolytic enzymes, were similarly affected in BV2 cells. These differences suggest subtly distinct nutrient availability or requirement in different host cells despite the known predominant use of lipids in both amoeba and microglial cells.IMPORTANCEThe emergence of biochemically and genetically tractable host model organisms for infection studies holds the promise to accelerate the pace of discoveries related to the evolution of innate immunity and the dissection of conserved mechanisms of cell-autonomous defenses. Here, we have used the genetically and biochemically tractable infection model system Dictyostelium discoideum/Mycobacterium marinum to apply a genome-wide transposon-sequencing experimental strategy to reveal comprehensively which mutations confer a fitness advantage or disadvantage during infection and compare these to a similar experiment performed using the murine microglial BV2 cells as host for M. marinum to identify conservation of virulence pathways between hosts.

Published
2024
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36. Charge density waves in YBa$_2$Cu$_3$O$_{6.67}$ probed by resonant x-ray scattering under uniaxial compression

Author

Kim, H. -H., Lefrançois, E., Kummer, K., Fumagalli, R., Brookes, N. B., Betto, D., Nakata, S., Tortora, M., Porras, J., Loew, T., Barber, M., Braicovich, L., Mackenzie, A. P., Hicks, C. W., Keimer, B., Minola, M., and Tacon, M. Le

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

We report a comprehensive Cu L$_3$-edge resonant x-ray scattering study of two- and three-dimensional (2D and 3D) incommensurate charge correlations in single crystals of the underdoped high-temperature superconductor YBa$_2$Cu$_3$O$_{6.67}$ under uniaxial compression up to 1% along the two inequivalent Cu-O-Cu bond directions (a and b) in the CuO$_2$ planes. The pressure response of the 2D charge correlations is symmetric: pressure along a enhances correlations along b, and vice versa. Our results imply that the underlying order parameter is uniaxial. In contrast, 3D long-range charge order is only observed along b in response to compression along a. Spectroscopic resonant x-ray scattering measurements show that the 3D charge order resides exclusively in the CuO$_2$ planes and may thus be generic to the cuprates. We discuss implications of these results for models of electronic nematicity and for the interplay between charge order and superconductivity., Comment: Revised version - Accepted for publication in Phys. Rev. Lett

Published
2020
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37. Calibration and performance of the LHCb calorimeters in Run 1 and 2 at the LHC

Author

Beteta, C. Abellán, Albero, A. Alfonso, Amhis, Y., Barsuk, S., Beigbeder-Beau, C., Belyaev, I., Bonnefoy, R., Breton, D., Callot, O., Gomez, M. Calvo, Camboni, A., Chanal, H., Charlet, D., Chefdeville, M., Coco, V., Cogneras, E., Comerma-Montells, A., Coquereau, S., Deschamps, O., Bonal, F. Domingo, Drancourt, C., Duarte, O., Dayot, N. Dumont, Dzhelyadin, R., Egorychev, V., Esperante, D., Filippov, S., Garrido, L., Gascon, D., Ghez, Ph., Gioi, L. L., Gironell, P. Gironella, Golubkov, D., Golutvin, A., Gàndara, M. Grabalosa, Diaz, R. Graciani, Graugés, E., Gushchin, E., Guz, Yu., Hadjivasiliou, C., Jean-Marie, B., Konoplyannikov, A., Kristic, R., Kvaratskheliya, T., Lefèvre, R., Lefrançois, J., Li, Y., Machefert, F., Machikhiliyan, I., Marchand, J. -F., Benito, C. Marin, Martens, A., Martin-Sànchez, A., Matveev, V., Mauricio, J., Minard, M. -N., Monteil, S., Niess, V., Obraztsov, V., Pereima, D., Perret, P., Olloqui, E. Picatoste, Pietrzyk, B., Navarro, A. Puig, Rives-Molina, V., Robbe, P., Roselló, M., Ruiz, H., Mayordomo, C. Sanchez, Savrina, D., Schopper, A., Schune, M. H., Semennikov, A., Shatalov, P., Soldatov, M., Stenyakin, O., Tisserand, V., T'Jampens, S., Tocut, V., Tournefier, E., Vallier, A., Gomez, R. Vazquez, Viaud, B., Vilasis-Cardona, X., Winn, M., Yushchenko, O., and Zhokhov, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The calibration and performance of the LHCb Calorimeter system in Run 1 and 2 at the LHC are described. After a brief description of the sub-detectors and of their role in the trigger, the calibration methods used for each part of the system are reviewed. The changes which occurred with the increase of beam energy in Run 2 are explained. The performances of the calorimetry for $\gamma$ and $\pi^0$ are detailed. A few results from collisions recorded at $\sqrt {s}$ = 7, 8 and 13 TeV are shown., Comment: All figures and tables, along with any supplementary material and additional information, are available at http://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-DP-2020-001.html (LHCb public pages)

Published
2020

38. Thermal Hall conductivity in the cuprate Mott insulators Nd$_2$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$

Author

Boulanger, Marie-Eve, Grissonnanche, Gaël, Badoux, Sven, Allaire, Andréanne, Lefrançois, Étienne, Legros, Anaëlle, Gourgout, Adrien, Dion, Maxime, Wang, C. H., Chen, X. H., Liang, R., Hardy, W. N., Bonn, D. A, and Taillefer, Louis

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Superconductivity
Abstract

The heat carriers responsible for the unexpectedly large thermal Hall conductivity of the cuprate Mott insulator La$_2$CuO$_4$ were recently shown to be phonons. However, the mechanism by which phonons in cuprates acquire chirality in a magnetic field is still unknown. Here, we report a similar thermal Hall conductivity in two cuprate Mott insulators with significantly different crystal structures and magnetic orders - Nd$_2$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$ - and show that two potential mechanisms can be excluded - the scattering of phonons by rare-earth impurities and by structural domains. Our comparative study further reveals that orthorhombicity, apical oxygens, the tilting of oxygen octahedra and the canting of spins out of the CuO$_2$ planes are not essential to the mechanism of chirality. Our findings point to a chiral mechanism coming from a coupling of acoustic phonons to the intrinsic excitations of the CuO$_2$ planes., Comment: 29 pages, 8 figures

Published
2020
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39. Fragmented monopole crystal, dimer entropy and Coulomb interactions in Dy$_2$Ir$_2$O$_7$

Author

Cathelin, V., Lefrançois, E., Robert, J., Guruciaga, P. C., Paulsen, C., Prabhakaran, 1 D., Lejay, P., Damay, F., Ollivier, J., Fåk, B., Chapon, L. C., Ballou, R., Simonet, V., Holdsworth, P. C. W., and Lhotel, E.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

Neutron scattering, specific heat and magnetisation measurements on both powders and single crystals reveal that Dy$_2$Ir$_2$O$_7$ realizes the fragmented monopole crystal state in which antiferromagnetic order and a Coulomb phase spin liquid co-inhabit. The measured residual entropy is that of a hard core dimer liquid, as predicted. Inclusion of Coulomb interactions allows for a quantitative description of both the thermodynamic data and the magnetisation dynamics, with the energy scale given by deconfined defects in the emergent ionic crystal. Our data reveal low energy excitations, as well as a large distribution of energy barriers down to low temperatures, while the magnetic response to an applied field suggests that domain wall pinning is important; results that call for further theoretical modelling., Comment: 6 pages + supp. mat. 6 pages

Published
2020
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40. Phonons become chiral in the pseudogap phase of cuprates

Author

Grissonnanche, G., Thériault, S., Gourgout, A., Boulanger, M. -E., Lefrançois, E., Ataei, A., Laliberté, F., Dion, M., Zhou, J. -S., Pyon, S., Takayama, T., Takagi, H., Doiron-Leyraud, N., and Taillefer, L.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

The nature of the pseudogap phase of cuprates remains a major puzzle. One of its new signatures is a large negative thermal Hall conductivity $\kappa_{\rm xy}$, which appears for dopings $p$ below the pseudogap critical doping $p^*$, but whose origin is as yet unknown. Because this large $\kappa_{\rm xy}$ is observed even in the undoped Mott insulator La$_2$CuO$_4$, it cannot come from charge carriers, these being localized at $p = 0$. Here we show that the thermal Hall conductivity of La$_2$CuO$_4$ is roughly isotropic, being nearly the same for heat transport parallel and normal to the CuO$_2$ planes, i.e. $\kappa_{\rm zy}(T) \approx \kappa_{\rm xy} (T)$. This shows that the Hall response must come from phonons, these being the only heat carriers able to move as easily normal and parallel to the planes . At $p > p^*$, in both La$_{\rm 1.6-x}$Nd$_{\rm 0.4}$Sr$_x$CuO$_4$ and La$_{\rm 1.8-x}$Eu$_{\rm 0.2}$Sr$_x$CuO$_4$ with $p = 0.24$, we observe no c-axis Hall signal, i.e. $\kappa_{\rm zy}(T) = 0$, showing that phonons have zero Hall response outside the pseudogap phase. The phonon Hall response appears immediately below $p^* = 0.23$, as confirmed by the large $\kappa_{\rm zy}(T)$ signal we find in La$_{1.6-x}$Nd$_{\rm 0.4}$Sr$_x$CuO$_4$ with $p = 0.21$. The microscopic mechanism by which phonons become chiral in cuprates remains to be identified. This mechanism must be intrinsic - from a coupling of phonons to their electronic environment - rather than extrinsic, from structural defects or impurities, as these are the same on both sides of $p^*$. This intrinsic phonon Hall effect provides a new window on quantum materials and it may explain the thermal Hall signal observed in other topologically nontrivial insulators.

Published
2020
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41. A social-ecological systems approach to tick bite and tick-borne disease risk management: Exploring collective action in the Occitanie region in southern France

Author

Iyonna Zortman, Michel de Garine-Wichatitsky, Elena Arsevska, Timothée Dub, Wim Van Bortel, Estelle Lefrançois, Laurence Vial, Thomas Pollet, and Aurélie Binot

Subjects
Collective action, One health, Participatory approaches, Social-ecological systems, Tick-borne disease, Transdisciplinarity, Medicine (General), R5-920
Abstract

Ticks are amongst the most important zoonotic disease vectors affecting human and animal health worldwide. Tick-borne diseases (TBDs) are rapidly expanding geographically and in incidence, most notably in temperate regions of Europe where ticks are considered the principal zoonotic vector of Public Health relevance, as well as a major health and economic preoccupation in agriculture and equine industries. Tick-borne pathogen (TBP) transmission is contingent on complex, interlinked vector-pathogen-host dynamics, environmental and ecological conditions and human behavior. Tackling TBD therefore requires a better understanding of the interconnected social and ecological variables (i.e., the social-ecological system) that favor disease (re)-emergence. The One Health paradigm recognizes the interdependence of human, animal and environmental health and proposes an integrated approach to manage TBD. However, One Health interventions are limited by significant gaps in our understanding of the complex, systemic nature of TBD risk, in addition to a lack of effective, universally accepted and environmentally conscious tick control measures. Today individual prevention gestures are the most effective strategy to manage TBDs in humans and animals, making local communities important actors in TBD detection, prevention and management. Yet, how they engage and collaborate within a multi-actor TBD network has not yet been explored. Here, we argue that transdisciplinary collaborations that go beyond research, political and medical stakeholders, and extend to local community actors can aid in identifying relevant social-ecological risk indicators key for informing multi-level TBD detection, prevention and management measures. This article proposes a transdisciplinary social-ecological systems framework, based on participatory research approaches, to better understand the necessary conditions for local actor engagement to improve TBD risk. We conclude with perspectives for implementing this methodological framework in a case study in the south of France (Occitanie region), where multi-actor collaborations are mobilized to stimulate multi-actor collective action and identify relevant social-ecological indicators of TBD risk.

Published
2023
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42. Efficient yeast ChIP-Seq using multiplex short-read DNA sequencing

Author

Yellman Christopher M, Gibson Theodore, Rozowsky Joel, Auerbach Raymond K, Euskirchen Ghia M, Lefrançois Philippe, Gerstein Mark, and Snyder Michael

Subjects
Biotechnology, TP248.13-248.65, Genetics, QH426-470
Abstract

Abstract Background Short-read high-throughput DNA sequencing technologies provide new tools to answer biological questions. However, high cost and low throughput limit their widespread use, particularly in organisms with smaller genomes such as S. cerevisiae. Although ChIP-Seq in mammalian cell lines is replacing array-based ChIP-chip as the standard for transcription factor binding studies, ChIP-Seq in yeast is still underutilized compared to ChIP-chip. We developed a multiplex barcoding system that allows simultaneous sequencing and analysis of multiple samples using Illumina's platform. We applied this method to analyze the chromosomal distributions of three yeast DNA binding proteins (Ste12, Cse4 and RNA PolII) and a reference sample (input DNA) in a single experiment and demonstrate its utility for rapid and accurate results at reduced costs. Results We developed a barcoding ChIP-Seq method for the concurrent analysis of transcription factor binding sites in yeast. Our multiplex strategy generated high quality data that was indistinguishable from data obtained with non-barcoded libraries. None of the barcoded adapters induced differences relative to a non-barcoded adapter when applied to the same DNA sample. We used this method to map the binding sites for Cse4, Ste12 and Pol II throughout the yeast genome and we found 148 binding targets for Cse4, 823 targets for Ste12 and 2508 targets for PolII. Cse4 was strongly bound to all yeast centromeres as expected and the remaining non-centromeric targets correspond to highly expressed genes in rich media. The presence of Cse4 non-centromeric binding sites was not reported previously. Conclusion We designed a multiplex short-read DNA sequencing method to perform efficient ChIP-Seq in yeast and other small genome model organisms. This method produces accurate results with higher throughput and reduced cost. Given constant improvements in high-throughput sequencing technologies, increasing multiplexing will be possible to further decrease costs per sample and to accelerate the completion of large consortium projects such as modENCODE.

Published
2009
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44. Thermal conductivity of the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2: No evidence of mobile gapless excitations

Author

Bourgeois-Hope, P., Laliberté, F., Lefrançois, E., Grissonnanche, G., de Cotret, S. René, Gordon, R., Kitou, S., Sawa, H., Cui, H., Kato, R., Taillefer, L., and Doiron-Leyraud, N.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

The thermal conductivity $\kappa$ of the quasi-2D organic spin-liquid candidate EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ (dmit-131) was measured at low temperatures, down to 0.07 K. We observe a vanishingly small residual linear term $\kappa_0/T$, in $\kappa/T$ vs $T$ as $T \to 0$. This shows that the low-energy excitations responsible for the sizeable residual linear term $\gamma$ in the specific heat $C$, seen in $C/T$ vs $T$ as $T \to 0,$ are localized. We conclude that there are no mobile gapless excitations in this spin liquid candidate, in contrast with a prior study of dmit-131 that reported a large $\kappa_0/T$ value [Yamashita et al., Science 328, 1246 (2010)]. Our study shows that dmit-131 is in fact similar to $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$, another quasi-2D organic spin-liquid candidate where a vanishingly small $\kappa_0/T$ and a sizeable $\gamma$ are seen. We attribute heat conduction in these organic insulators without magnetic order to phonons undergoing strong spin-phonon scattering, as observed in several other spin-liquid materials., Comment: This revision includes a response to Yamashita's paper [M. Yamashita, Journal of the Physical Society of Japan 88, 083702 (2019)], data on a new sample, two new figures (Figs. 5 and 8), and a Supplementary Material (available upon request)

Published
2019
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45. Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa$_{2}$Cu$_{3}$O$_{7-\delta}$

Author

Fumagalli, R., Braicovich, L., Minola, M., Peng, Y. Y., Kummer, K., Betto, D., Rossi, M., Lefrançois, E., Morawe, C., Salluzzo, M., Suzuki, H., Yakhou, F., Tacon, M. Le, Keimer, B., Brookes, N. B., Sala, M. Moretti, and Ghiringhelli, G.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

High resolution resonant inelastic x-ray scattering (RIXS) has proven particularly effective in the determination of crystal field and spin excitations in cuprates. Its strength lies in the large Cu $L_{3}$ resonance and in the fact that the scattering cross section follows quite closely the single-ion model predictions, both in the insulating parent compounds and in the superconducting doped materials. However, the spectra become increasingly broader with (hole) doping, hence resolving and assigning spectral features has proven challenging even with the highest energy resolution experimentally achievable. Here we have overcome this limitation by measuring the complete polarization dependence of the RIXS spectra as function of momentum transfer and doping in thin films of NdBa$_{2}$Cu$_{3}$O$_{7-\delta}$. Besides confirming the previous assignment of $dd$ and spin excitations (magnon, bimagnon) in the antiferromagnetic insulating parent compound, we unequivocally single out the actual spin-flip contribution at all dopings. We also demonstrate that the softening of $dd$ excitations is mainly attributed to the shift of the $xy$ peak to lower energy loss. These results provide a definitive assessment of the RIXS spectra of cuprates and demonstrate that RIXS measurements with full polarization control are practically feasible and highly informative., Comment: 14 pages, 10 figures

Published
2019
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46. Measurement of the ratio of branching fractions of the decays $\Lambda^0_b\!\to\psi(2S) \Lambda$ and $\Lambda^0_b\!\to J/\psi \Lambda$

Author

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., Romeu, J. Arnau, Artamonov, A., Artuso, M., Aslanides, E., Atzeni, M., Auriemma, G., Baalouch, M., Babuschkin, I., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Bencivenni, G., Ben-Haim, E., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., Bezshyiko, Ia., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bordyuzhin, I., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Brodzicka, J., Brundu, D., Buchanan, E., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chen, S., Cheung, S. F., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Cindolo, F., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., D'Ambrosio, C., d'Argent, P., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., de Vries, J. A., Dean, C. T., Decamp, D., Del Buono, L., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Dijkstra, H., Dordei, F., Dorigo, M., Reis, A. C. dos, Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Ebert, M., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farley, N., Farry, S., Fazzini, D., Federici, L., Féo, M., Ferguson, D., Fernandez, G., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Furfaro, E., Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Garsed, P. J., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gushchin, E., Guz, Yu., Gys, T., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henrard, P., Henry, L., Heß, M., Hicheur, A., Hill, D., Hopchev, P. H., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Ibis, P., Idzik, M., Ilten, P., Inyakin, A., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kosmyntseva, A., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Lefèvre, R., Leflat, A., Lefrançois, J., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, T., Li, Y., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lucchesi, D., Martinez, M. Lucio, Luo, H., Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. 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Subjects
High Energy Physics - Experiment
Abstract

Using $pp$ collisions corresponding to 3$\,\text{fb}^{-1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8$\,\text{TeV}$, the ratio of branching fractions \begin{align*} \mathcal{B}(\Lambda^0_b\!\to\psi(2S) \Lambda )/\mathcal{B}(\Lambda^0_b\!\to J/\psi \Lambda)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm 0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-041.html (LHCb public pages)

Published
2019
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47. Observation of the doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$

Author

LHCb collaboration, Aaij, R., Beteta, C. Abellán, Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barrand, G. C., Barsuk, S., Barter, W., Bartolini, M., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battig, A., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. 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Rodriguez, Roehrken, M., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schulte, S., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skiba, I., Skidmore, N., Skwarnicki, T., Slater, M. W., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Norella, E. Spadaro, Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Sun, Y., Swientek, K., Szabelski, A., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Vernet, M., Veronesi, M., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Bruch, D. Vom, Voneki, B., Vorobyev, A., Vorobyev, V., Voropaev, N., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Winn, M., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$ with $\phi\to K^{+}K^{-}$ is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb$^{-1}$ recorded with the LHCb detector in $pp$ collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay $\Xi_{c}^{+}\to p\phi$ and the singly Cabibbo-suppressed decay $\Xi_{c}^{+}\to pK^{-}\pi^{+}$ is measured to be \begin{equation*} \frac{\mathcal{B}(\Xi_{c}^{+}\to p\phi)}{\mathcal{B}(\Xi_{c}^{+}\to pK^{-}\pi^{+})} = (19.8 \pm 0.7 \pm 0.9 \pm 0.2) \times 10^{-3}, \end{equation*} where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the $\phi\to K^{+}K^{-}$ branching fraction., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2018-040.html

Published
2019
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48. Giant thermal Hall conductivity from neutral excitations in the pseudogap phase of cuprates

Author

Grissonnanche, Gaël, Legros, Anaëlle, Badoux, Sven, Lefrançois, Etienne, Zatko, Victor, Lizaire, Maude, Laliberté, Francis, Gourgout, Adrien, Zhou, Jianshi, Pyon, Sunseng, Takayama, Tomohiro, Takagi, Hidenori, Ono, Shimpei, Doiron-Leyraud, Nicolas, and Taillefer, Louis

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

The nature of the pseudogap phase of cuprates remains a major puzzle. Although there are indications that this phase breaks various symmetries, there is no consensus on its fundamental nature. Although Fermi-surface, transport and thermodynamic signatures of the pseudogap phase are reminiscent of a transition into a phase with antiferromagnetic order, there is no evidence for an associated long-range magnetic order. Here we report measurements of the thermal Hall conductivity $\kappa_{\rm xy}$ in the normal state of four different cuprates (Nd-LSCO, Eu-LSCO, LSCO, and Bi2201) and show that a large negative $\kappa_{\rm xy}$ signal is a property of the pseudogap phase, appearing with the onset of that phase at the critical doping $p^*$. Since it is not due to charge carriers -- as it persists when the material becomes an insulator, at low doping -- or magnons -- as it exists in the absence of magnetic order -- or phonons -- since skew scattering is very weak, we attribute this $\kappa_{\rm xy}$ signal to exotic neutral excitations, presumably with spin chirality. The thermal Hall conductivity in the pseudogap phase of cuprates is reminiscent of that found in insulators with spin-liquid states. In the Mott insulator LCO, it attains the highest known magnitude of any insulator., Comment: 4 figures + 5 supplemental figures

Published
2019
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49. Measurement of the branching fraction and $C\!P$ asymmetry in $B^{+}\rightarrow J/\psi \rho^{+}$ decays

Author

LHCb collaboration, Aaij, R., Beteta, C. Abellán, Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barrand, G. C., Barsuk, S., Barter, W., Bartolini, M., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battig, A., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Cindolo, F., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Féo, M., Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gibson, V., Girard, O. G., Gironell, P. Gironella, Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guth, A., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heuel, J., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, J., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Inyakin, A., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jashal, B. K., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, Y., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, G., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Moise, R. D., Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Newcombe, R., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Ovsiannikova, T., Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skiba, I., Skidmore, N., Skwarnicki, T., Slater, M. W., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Norella, E. Spadaro, Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Szabelski, A., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Bruch, D. Vom, Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Winn, M., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

The branching fraction and direct $C\!P$ asymmetry of the decay $B^{+}\rightarrow J/\psi \rho^{+}$ are measured using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3$\mbox{fb}^{-1}$. The following results are obtained: \begin{align} \mathcal{B}(B^{+}\rightarrow J/\psi \rho^{+}) &= (3.81 ^{+0.25}_{-0.24} \pm 0.35) \times 10^{-5}, \nonumber \\ \mathcal{A}^{C\!P} (B^{+}\rightarrow J/\psi \rho^{+}) &= -0.045^{+0.056}_{-0.057} \pm 0.008, \nonumber \end{align} where the first uncertainties are statistical and the second systematic. Both measurements are the most precise to date., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2018-036.html

Published
2018
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50. Search for the rare decay $B^{+} \rightarrow {\mu}^{+}{\mu}^{-}{\mu}^{+}{\nu}_{{\mu}}$

Author

LHCb collaboration, Aaij, R., Beteta, C. Abellán, Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. Alfonso, Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Archilli, F., d'Argent, P., Romeu, J. Arnau, Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Back, J. J., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barrand, G. C., Barsuk, S., Barter, W., Bartolini, M., Baryshnikov, F., Batozskaya, V., Batsukh, B., Battig, A., Battista, V., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Belin, S., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M. O., van Beuzekom, M., Bezshyiko, Ia., Bhasin, S., Bhom, J., Bifani, S., Billoir, P., Birnkraut, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Bocci, V., Garcia, O. Boente, Boettcher, T., Bondar, A., Bondar, N., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bozzi, C., Braun, S., Brodski, M., Brodzicka, J., Gonzalo, A. Brossa, Brundu, D., Buchanan, E., Buonaura, A., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Perez, D. H. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Casse, G., Cassina, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, Ph., Chatzikonstantinidis, G., Chefdeville, M., Chekalina, V., Chen, C., Chen, S., Chitic, S. -G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Vidal, X. Cid, Ciezarek, G., Cindolo, F., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Coelho, J. A. B., Cogan, J., Cogneras, E., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Sobral, C. M. Costa, Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Currie, R., D'Ambrosio, C., Marinho, F. Da Cunha, Da Silva, C. L., Dall'Occo, E., Dalseno, J., Danilina, A., Davis, A., Francisco, O. De Aguiar, De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Delaney, B., Dembinski, H. -P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Desse, F., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Didenko, S., Dijkstra, H., Dordei, F., Dorigo, M., Suárez, A. Dosil, Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Durante, P., Durham, J. M., Dutta, D., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Ene, A., Escher, S., Esen, S., Evans, T., Falabella, A., Farley, N., Farry, S., Fazzini, D., Federici, L., Declara, P. Fernandez, Prieto, A. Fernandez, Ferrari, F., Lopes, L. Ferreira, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fontana, M., Fontanelli, F., Forty, R., Lima, V. Franco, Frank, M., Frei, C., Fu, J., Funk, W., Färber, C., Féo, M., Gabriel, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gan, Y., Gandelman, M., Gandini, P., Gao, Y., Martin, L. M. Garcia, Plana, B. Garcia, Pardiñas, J. García, Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Gerstel, D., Ghez, Ph., Gibson, V., Girard, O. G., Gironell, P. Gironella, Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Cazon, B. R. Gruberg, Grünberg, O., Gu, C., Gushchin, E., Guth, A., Guz, Yu., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, T., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henry, L., van Herwijnen, E., Heuel, J., Heß, M., Hicheur, A., Charman, R. Hidalgo, Hill, D., Hilton, M., Hopchev, P. H., Hu, J., Hu, W., Huang, W., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Hynds, D., Ibis, P., Idzik, M., Ilten, P., Inyakin, A., Ivshin, K., Jacobsson, R., Jalocha, J., Jans, E., Jashal, B. K., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Keizer, F., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kim, K. E., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Kopecna, R., Koppenburg, P., Kostiuk, I., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Kress, F., Krokovny, P., Krupa, W., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lancierini, D., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Leroy, O., Lesiak, T., Leverington, B., Li, P. -R., Li, Y., Li, Z., Liang, X., Likhomanenko, T., Lindner, R., Lionetto, F., Lisovskyi, V., Liu, G., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lovell, G. H., Lucchesi, D., Martinez, M. Lucio, Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malecki, B., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marinangeli, M., Marino, P., Marks, J., Marshall, P. J., Martellotti, G., Martin, M., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Massafferri, A., Materok, M., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M. -N., Minzoni, L., Mitzel, D. S., Mogini, A., Moise, R. D., Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, G., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Murphy, C. H., Murray, D., Mödden, A., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nanut, T., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Newcombe, R., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nogay, A., Nolte, N. S., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Goicochea, J. M. Otalora, Ovsiannikova, T., Owen, P., Oyanguren, A., Pais, P. R., Pajero, T., Palano, A., Palutan, M., Panshin, G., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Pereima, D., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petrucci, S., Petruzzo, M., Pietrzyk, B., Pietrzyk, G., Pikies, M., Pili, M., Pinci, D., Pinzino, J., Pisani, F., Piucci, A., Placinta, V., Playfer, S., Plews, J., Casasus, M. Plo, Polci, F., Lener, M. Poli, Poluektov, A., Polukhina, N., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Navarro, A. Puig, Pullen, H., Punzi, G., Qian, W., Qin, J., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Pernas, M. Ramos, Rangel, M. S., Ratnikov, F., Raven, G., Salzgeber, M. Ravonel, Reboud, M., Redi, F., Reichert, S., Reis, A. C. dos, Reiss, F., Alepuz, C. Remon, Ren, Z., Renaudin, V., Ricciardi, S., Richards, S., Rinnert, K., Robbe, P., Robert, A., Rodrigues, A. B., Rodrigues, E., Lopez, J. A. Rodriguez, Roehrken, M., Roiser, S., Rollings, A., Romanovskiy, V., Vidal, A. Romero, Rotondo, M., Rudolph, M. S., Ruf, T., Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N., Saitta, B., Guimaraes, V. Salustino, Gras, C. Sanchez, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saur, M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubiger, M., Schune, M. H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepulveda, E. S., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seuthe, A., Seyfert, P., Shapkin, M., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shmanin, E., Siddi, B. G., Coutinho, R. Silva, de Oliveira, L. Silva, Simi, G., Simone, S., Skiba, I., Skidmore, N., Skwarnicki, T., Slater, M. W., Smeaton, J. G., Smith, E., Smith, I. T., Smith, M., Soares, M., Lavra, l. Soares, Sokoloff, M. D., Soler, F. J. P., De Paula, B. Souza, Spaan, B., Norella, E. Spadaro, Spradlin, P., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stocchi, A., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Strokov, S., Sun, J., Sun, L., Swientek, K., Szabelski, A., Szumlak, T., Szymanski, M., T'Jampens, S., Tang, Z., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Tou, D. Y., Aoude, R. Tourinho Jadallah, Tournefier, E., Traill, M., Tran, M. T., Trisovic, A., Tsaregorodtsev, A., Tuci, G., Tully, A., Tuning, N., Ukleja, A., Usachov, A., Ustyuzhanin, A., Uwer, U., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Vernet, M., Veronesi, M., Veronika, N. V., Vesterinen, M., Barbosa, J. V. Viana, Vieira, D., Diaz, M. Vieites, Viemann, H., Vilasis-Cardona, X., Vitkovskiy, A., Vitti, M., Volkov, V., Vollhardt, A., Bruch, D. Vom, Voneki, B., Vorobyev, A., Vorobyev, V., de Vries, J. A., Sierra, C. Vázquez, Waldi, R., Walsh, J., Wang, J., Wang, M., Wang, Y., Wang, Z., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Weisser, C., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, I., Williams, M. R. J., Williams, M., Williams, T., Wilson, F. F., Winn, M., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wyllie, K., Xiao, D., Xie, Y., Xu, A., Xu, M., Xu, Q., Xu, Z., Yang, Z., Yao, Y., Yeomans, L. E., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, D., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.

Subjects
High Energy Physics - Experiment
Abstract

A search for the rare leptonic decay $B^{+} \rightarrow {\mu}^{+}{\mu}^{-}{\mu}^{+}{\nu}_{{\mu}}$ is performed using proton-proton collision data corresponding to an integrated luminosity of $4.7$ fb$^{-1}$ collected by the LHCb experiment. The search is carried out in the region where the lowest of the two ${\mu}^{+}{\mu}^{-}$ mass combinations is below $980$MeV/c$^{2}$. The data are consistent with the background-only hypothesis and an upper limit of $1.6 \times 10^{-8}$ at 95% confidence level is set on the branching fraction in the stated kinematic region., Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2018-037.html

Published
2018
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