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Tang R, Silva L, Chmielewski M. C-39Is Non-Verbal Problem Solving Dependent on Language? Arch Clin Neuropsychol 2017. [DOI: 10.1093/arclin/acx076.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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77
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Silva L, Pereira OG, Leandro ES, Roseira JP, Agarussi MCN, Silva VP, Amaro F, Filho SCV. 282 Effect of Lactobacillus buchneri isolated from tropical corn silage on fermentation and aerobic stability of sugarcane silage. J Anim Sci 2017. [DOI: 10.2527/asasann.2017.282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Silva L, Pereira OG, Santos SA, Ribeiro KG, Roseira JP, Agarussi MCN, Silva VP, Amaro F, Martins RM. 281 Effect of Lactobacillus buchneri isolated from tropical corn silage on fermentation and aerobic stability. J Anim Sci 2017. [DOI: 10.2527/asasann.2017.281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Silva L, Pereira OG, Silva TC, Roseira JP, Agarussi MCN, Silva VP, Paula RA, Martins RM, Bernardes TF. 280 Isolation and identification of lactic acid bacteria that colonize tropical whole-plant corn silage during the fermentation process. J Anim Sci 2017. [DOI: 10.2527/asasann.2017.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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80
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Silva L, Damrose E, Fernandes AMF. Laryngeal leishmaniasis, a rare manifestation of an emerging disease. Eur Ann Otorhinolaryngol Head Neck Dis 2017; 134:211-212. [PMID: 28344078 DOI: 10.1016/j.anorl.2015.11.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 11/24/2015] [Accepted: 11/30/2015] [Indexed: 11/18/2022]
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Pardo F, Aedo A, Silva L, Chiarello D, Leiva A, Sobrevia L. Excessive gestational weight gain reduces the response to vasoactive molecules in human fetoplacental microvessels. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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82
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Silva L, Subiabre M, Villalobos-Labra R, Salsoso R, López A, Paulo M, Pardo F, Leiva A, Sobrevia L. Insulin therapy restores the equilibrative nucleoside transporter 1 expression in human umbilical vein endothelial cells from gestational diabetes mellitus. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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83
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Subiabre M, Salsoso R, Villalobos-Labra R, Silva L, Fuenzalida B, Araos J, López A, Paulo M, Pardo F, Leiva A, Sobrevia L. Insulin therapy fails to reverse the human foetoplacental endothelial dysfunction in gestational diabetes mellitus. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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84
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Villalobos-Labra R, Salsoso R, Subiabre M, Silva L, Farías-Jofré M, Leiva A, Sobrevia L. Endoplasmic reticulum stress in human umbilical vein endothelial cells from pre-gestational maternal obesity. Placenta 2017. [DOI: 10.1016/j.placenta.2017.01.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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85
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Lazarotto R, Trentin Filho F, Mezzari M, Tordi N, Sagawa Y, Soares A, Silva L, Borges N, Gevaerd M, Carvalho T, Oliveira J, Peres D, Domenech S. CARACTERÍSTICAS DA FORÇA MUSCULAR EM INDIVÍDUOS COM ARTRITE REUMATOIDE DA REGIÃO OESTE DE SANTA CATARINA. REVISTA BRASILEIRA DE REUMATOLOGIA 2017. [DOI: 10.1016/j.rbr.2017.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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86
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Oliveira J, Mezzari M, Reck P, Tordi N, Jr YS, Peres D, Silva L, Borges N, Gevaerd M, Carvalho T, Domenech S. PERFIL DE CAQUEXIA REUMATOIDE EM INDIVÍDUOS COM AR DA GRANDE FLORIANÓPOLIS: UM ESTUDO PRELIMINAR. REVISTA BRASILEIRA DE REUMATOLOGIA 2017. [DOI: 10.1016/j.rbr.2017.06.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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87
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Barros A, Santos H, Moreira L, Ribeiro N, Silva L, Santos-Silva F. The Cancer, Educate to Prevent Model-the Potential of School Environment for Primary Prevention of Cancer. JOURNAL OF CANCER EDUCATION : THE OFFICIAL JOURNAL OF THE AMERICAN ASSOCIATION FOR CANCER EDUCATION 2016; 31:646-651. [PMID: 26268942 DOI: 10.1007/s13187-015-0892-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Cancer represents one of the main causes of death worldwide; consequently, preventive interventions are of utmost importance in public health education. The leading model of cancer prevention campaigns is based on general and undifferentiated actions mediated by health professionals, focusing on the technical and scientific information but rather ineffective in changing the symbolic, cognitive and practical relationship with the disease. New intervention models are thus required to address cancer literacy, being early interventions targeted to specific groups an elective counterpoint to contribute to positive and durable changes in cancer prevention. Our aim is to evaluate the feasibility and impact of cancer prevention programmes planned as focused interventions in restricted targets and mediated by non-healthcare professionals to increase cancer literacy and promote preventive behaviours. This pilot study evaluates schools' potential as a vehicle for cancer prevention education in a reality shaped by traditional health prevention campaigns. We developed a protocol of systematic surveying in order to review and, in the future, optimize and replicate this ecological model of intervention to other groups and contexts. The implementation of this model has been successful in which concerns to the effectiveness of the training programme for teachers. This led to the development of impactful cancer prevention education projects by trainees targeted to their students, allowing us to argue that it contributes to knowledge and practice in this complex as consensual priority area of intervention.
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Araújo JP, Silva L, Andrade R, Paços M, Moreira H, Migueis N, Pereira R, Sarmento A, Pereira H, Loureiro N, Espregueira-Mendes J. Pain reduction and improvement of function following ultrasound-guided intra-articular injections of triamcinolone hexacetonide and hyaluronic acid in hip osteoarthritis. J BIOL REG HOMEOS AG 2016; 30:51-62. [PMID: 28002900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The scientific literature has shown positive results regarding intra-articular injections of hyaluronic acid in osteoarthritic joints. When injecting in the hip joint, the guidance of ultrasound can provide higher injection accuracy and repeatability. However, due to the methodological limitations in the current available literature, its recommendation in the current practice is still controversial. This study shows that ultrasound-guided intra-articular injections of triamcinolone hexacetonide and hyaluronic acid can improve pain, function and quality of life in patients with symptomatic and radiographic hip osteoarthritis. In addition, the administration of triamcinolone hexacetonide and hyaluronic acid to the hip joint in these patients can delay the need for interventional surgery.
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Silva L, Garcia L, Oliveira B, Tanita M, Festti J, Cardoso L, Lavado L, Grion C. Acute respiratory distress syndrome in burn patients: incidence and risk factor analysis. ANNALS OF BURNS AND FIRE DISASTERS 2016; 29:178-182. [PMID: 28149245 PMCID: PMC5266233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 05/09/2016] [Indexed: 06/06/2023]
Abstract
After a burn lesion, Acute Respiratory Distress Syndrome (ARDS) may occur via direct lung injury due to inhaled smoke and fumes or mediated by the inflammatory response associated with the burn or its infectious complications. The aim of the present study is to assess the epidemiologic profile of ARDS in adult burn patients admitted to intensive care in a burn unit at a university hospital. A prospective cohort study was performed from January to December 2012. Demographic and diagnostic data, prognostic scores, etiology and data on the extent and depth of burns were collected. Data related to risk factors for ARDS and death were also recorded. A total of 85 patients were included in the study. Patients were aged 41.7 (SD = 15.7) years old; 71.8% were male and the mean total body surface area burned was 28.3% (SD = 19.1%); 35.3% presented inhalation injuries. Invasive ventilatory support was required in 44 ICU inpatients (51.8%). ARDS was diagnosed in 38.6% of patients under invasive mechanical ventilation. In multivariate analysis, the presence of inhalation injuries was a risk factor for ARDS (OR = 9.75; CI 95% 2.79 - 33.95; P < 0.001). ARDS is a common complication in burn patients admitted to specialized intensive care units. Inhalation injuries were an independent risk factor for ARDS. Mortality rate observed in the study patients was high and associated with ARDS diagnosis.
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Rios J, Mieres J, Cerda P, Silva L, Olivares P, Medel P, Solari S, Paris E. Poisoning in Chile: A 10-year report from the Catholic University Poison Center. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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91
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Rios J, Reinike C, Silva L, Cerda P, Mieres J, Solari S, Iturra P, Paris E. Suicide poisonings in adolescents: Report from the catholic university poison information center 2006–2015. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Pego J, Lois A, Mouriño C, L-Longo F, Galindo M, Calvo J, Uña J, Balboa V, Olive A, Otόn T, Ibañez J, Horcada L, Sánchez A, Montilla C, Melero R, MTaboada V, Diez E, Fernandez M, Ruiz E, HBeriain J, Gantes M, HCruz B, Pecondon A, Lozano N, Bonilla G, Torrente V, Silva L, FNebro A, Rua I. THU0333 Chronological Analysis of Damage Accrual in SLE Patients from The spanish Registry (RELESSER). Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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93
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Silva L, Cunha D, Lopes J, Ramalheira J, Freire M, Novio S, Nunez MJ, Mendonca D, Martins-da-Silva A. Co-morbidities and sleep apnoea severity. A study in a cohort of Portuguese patients. Rev Neurol 2016; 62:433-438. [PMID: 27149185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
INTRODUCTION Obstructive sleep apnoea syndrome (OSAS) is frequently associated to other morbid conditions that act as risk factors influencing OSAS morbidity and mortality. AIM To analyse the presence of co-morbidities in OSAS patients, recruited from a sleep outpatient clinic in Northern Portugal, stratified as a function of OSAS severity. PATIENTS AND METHODS A cohort of 319 sleep-disordered patients was assessed by clinical and sleep video-polygraphic recording. Patients (n = 209) with sleep respiratory distress had OSAS (n = 145) and severity defined according to Apnoea/Hypopnea Index (AHI); 64 had primary snoring or respiratory distress with AHI < 5; and 110 had other sleep disorders. A full individual background study was possible in 128 OSAS patients. The association to unique or multiple co-morbidities was assessed by clinical and analytical studies in general group or as a function of OSAS severity. RESULTS The presence of co-morbidities was of 75% in all OSAS patients and of 79.5% in the severe group of OSAS. Forty seven of patients had only one co-morbidity. The most common was obesity (56.3%) followed by high blood pressure, diabetes and other cardiovascular disorders. Obesity was present in 84% among the most severe OSAS cases and always present in those with multiple co-morbidities. When compared with the group of patients without sleep respiratory distress the co-morbidity condition was more frequently related to OSAS (p = 0.0196). CONCLUSION Comorbidities are commonly associated to OSAS independently of disease severity. Among the comorbidities present obesity was the most common in the most severe OSAS cases.
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Adolph C, Akhunzyanov R, Alexeev MG, Alexeev GD, Amoroso A, Andrieux V, Anosov V, Austregesilo A, Azevedo C, Badełek B, Balestra F, Barth J, Beck R, Bedfer Y, Bernhard J, Bicker K, Bielert ER, Birsa R, Bisplinghoff J, Bodlak M, Boer M, Bordalo P, Bradamante F, Braun C, Bressan A, Büchele M, Burtin E, Chang WC, Chiosso M, Choi I, Chung SU, Cicuttin A, Crespo ML, Curiel Q, Dalla Torre S, Dasgupta SS, Dasgupta S, Denisov OY, Dhara L, Donskov SV, Doshita N, Dünnweber W, Duic V, Dziewiecki M, Efremov A, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Finger M, Finger M, Fischer H, Franco C, du Fresne von Hohenesche N, Friedrich JM, Frolov V, Gautheron F, Gavrichtchouk OP, Gerassimov S, Gnesi I, Gorzellik M, Grabmüller S, Grasso A, Grosse-Perdekamp M, Grube B, Grussenmeyer T, Guskov A, Haas F, Hahne D, von Harrach D, Hashimoto R, Heinsius FH, Herrmann F, Hinterberger F, Horikawa N, d'Hose N, Hsieh CY, Huber S, Ishimoto S, Ivanov A, Ivanshin Y, Iwata T, Jahn R, Jary V, Jörg P, Joosten R, Kabuß E, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Klimaszewski K, Koivuniemi JH, Kolosov VN, Kondo K, Königsmann K, Konorov I, Konstantinov VF, Kotzinian AM, Kouznetsov O, Krämer M, Kremser P, Krinner F, Kroumchtein ZV, Kuchinski N, Kunne F, Kurek K, Kurjata RP, Lednev AA, Lehmann A, Levillain M, Levorato S, Lichtenstadt J, Maggiora A, Magnon A, Makins N, Makke N, Mallot GK, Marchand C, Martin A, Marzec J, Matousek J, Matsuda H, Matsuda T, Meshcheryakov G, Meyer W, Michigami T, Mikhailov YV, Miyachi Y, Nagaytsev A, Nagel T, Nerling F, Neyret D, Nikolaenko VI, Novy J, Nowak WD, Nunes AS, Olshevsky AG, Orlov I, Ostrick M, Panzieri D, Parsamyan B, Paul S, Peng JC, Pereira F, Pesek M, Peshekhonov DV, Platchkov S, Pochodzalla J, Polyakov VA, Pretz J, Quaresma M, Quintans C, Ramos S, Regali C, Reicherz G, Riedl C, Rocco E, Rossiyskaya NS, Ryabchikov DI, Rychter A, Samoylenko VD, Sandacz A, Santos C, Sarkar S, Savin IA, Sbrizzai G, Schiavon P, Schmeing S, Schmidt K, Schmieden H, Schönning K, Schopferer S, Schlüter T, Selyunin A, Shevchenko OY, Silva L, Sinha L, Sirtl S, Slunecka M, Sozzi F, Srnka A, Stolarski M, Sulc M, Suzuki H, Szabelski A, Szameitat T, Sznajder P, Takekawa S, Ter Wolbeek J, Tessaro S, Tessarotto F, Thibaud F, Tskhay V, Uhl S, Veloso J, Virius M, Wallner S, Weisrock T, Wilfert M, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zink A. Observation of a New Narrow Axial-Vector Meson a1(1420). PHYSICAL REVIEW LETTERS 2015; 115:082001. [PMID: 26340182 DOI: 10.1103/physrevlett.115.082001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Indexed: 06/05/2023]
Abstract
The COMPASS Collaboration at CERN has measured diffractive dissociation of 190 GeV/c pions into the π(-)π(-)π(+) final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of 3π mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88 waves. A narrow peak is observed in the f0(980)π channel with spin, parity and C-parity quantum numbers J(PC)=1(++). We present a resonance-model study of a subset of the spin-density matrix selecting 3π states with J(PC)=2(++) and 4(++) decaying into ρ(770)π and with J(PC)=1(++) decaying into f0(980)π. We identify a new a1 meson with mass (1414(-13)(+15)) MeV/c2 and width (153(-23)(+8)) MeV/c2. Within the final states investigated in our analysis, we observe the new a1(1420) decaying only into f0(980)π, suggesting its exotic nature.
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Nakamura AT, Simão E, Silva L, Torres GA. Origin of the subepidermal tissue in Piper L. leaves. BRAZ J BIOL 2015; 75:368-71. [PMID: 26132020 DOI: 10.1590/1519-6984.13713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 01/06/2014] [Indexed: 11/22/2022] Open
Abstract
Studies on the anatomy of Piper leaves demonstrate the presence of a subepidermal tissue distinct from the adjacent epidermis, which cells show thin walls and hyaline contents. Some authors consider such cells a hypodermal tissue, while others refer to them as components of a multiple epidermis. In this study, the nature of this subepidermal tissue was investigated through the analysis of leaf ontogeny in three Piper species. The analysis showed that the referred tissue originates from the ground meristem and, thus, should be considered a hypodermis. The studied species suggests that the role of the hypodermis would be to protect the photosynthetic apparatus from excess light, regulating the intensity of light reaching the chlorophyll parenchyma.
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Sanhueza C, Araos J, Naranjo L, Sáez T, Silva L, Salsoso R, Pardo F, Leiva A, Cuello MA, Cornejo M, Ramírez MA, Sobrevia L. NHE1 PROMOTE CELL PROLIFERATION IN OVARIAN CANCER: A ROLE OF HYPOXIA-INDUCIBLE FACTORS.: IGCS-0038 06. Ovarian Cancer. Int J Gynecol Cancer 2015. [DOI: 10.1136/00009577-201505001-00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Sobrevia L, Sáez T, Salsoso R, Silva L, Villalobos R, Araos J, Naranjo L, Guzmán-Gutiérrez E, Gutiérrez J, Sanhueza C, Pardo F, Leiva A. Insulin restores L-arginine and adenosine transport requiring adenosine receptors espression in human fetoplacentaL endothelium from gestational diabetes mellitus. Placenta 2015. [DOI: 10.1016/j.placenta.2015.01.400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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98
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Silva L, Carvalho J, Freitas D, Ribeiro R, Dias T, Pinto C, Silva M, Azenha S. Pre-surgical Psychiatric Evaluation in Morbid Obesity - a Review. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)31052-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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99
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Adolph C, Akhunzyanov R, Alexeev MG, Alexeev GD, Amoroso A, Andrieux V, Anosov V, Austregesilo A, Badełek B, Balestra F, Barth J, Baum G, Beck R, Bedfer Y, Berlin A, Bernhard J, Bicker K, Bieling J, Birsa R, Bisplinghoff J, Bodlak M, Boer M, Bordalo P, Bradamante F, Braun C, Bressan A, Büchele M, Burtin E, Capozza L, Chiosso M, Chung SU, Cicuttin A, Colantoni M, Crespo ML, Curiel Q, Dalla Torre S, Dasgupta SS, Dasgupta S, Denisov OY, Dinkelbach AM, Donskov SV, Doshita N, Duic V, Dünnweber W, Dziewiecki M, Efremov A, Elia C, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Filin A, Finger M, Finger M, Fischer H, Franco C, du Fresne von Hohenesche N, Friedrich JM, Frolov V, Gautheron F, Gavrichtchouk OP, Gerassimov S, Geyer R, Gnesi I, Gobbo B, Goertz S, Gorzellik M, Grabmüller S, Grasso A, Grube B, Grussenmeyer T, Guskov A, Guthörl T, Haas F, von Harrach D, Hahne D, Hashimoto R, Heinsius FH, Herrmann F, Hinterberger F, Höppner C, Horikawa N, d'Hose N, Huber S, Ishimoto S, Ivanov A, Ivanshin Y, Iwata T, Jahn R, Jary V, Jasinski P, Jörg P, Joosten R, Kabuss E, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Klimaszewski K, Koivuniemi JH, Kolosov VN, Kondo K, Königsmann K, Konorov I, Konstantinov VF, Kotzinian AM, Kouznetsov O, Krämer M, Kroumchtein ZV, Kuchinski N, Kuhn R, Kunne F, Kurek K, Kurjata RP, Lednev AA, Lehmann A, Levillain M, Levorato S, Lichtenstadt J, Maggiora A, Magnon A, Makke N, Mallot GK, Marchand C, Martin A, Marzec J, Matousek J, Matsuda H, Matsuda T, Meshcheryakov G, Meyer W, Michigami T, Mikhailov YV, Miyachi Y, Moinester MA, Nagaytsev A, Nagel T, Nerling F, Neubert S, Neyret D, Nikolaenko VI, Novy J, Nowak WD, Nunes AS, Olshevsky AG, Orlov I, Ostrick M, Panknin R, Panzieri D, Parsamyan B, Paul S, Peshekhonov D, Platchkov S, Pochodzalla J, Polyakov VA, Pretz J, Quaresma M, Quintans C, Ramos S, Regali C, Reicherz G, Rocco E, Rossiyskaya NS, Ryabchikov DI, Rychter A, Samoylenko VD, Sandacz A, Sarkar S, Savin IA, Sbrizzai G, Schiavon P, Schill C, Schlüter T, Schmidt K, Schmieden H, Schönning K, Schopferer S, Schott M, Shevchenko OY, Silva L, Sinha L, Sirtl S, Slunecka M, Sosio S, Sozzi F, Srnka A, Steiger L, Stolarski M, Sulc M, Sulej R, Suzuki H, Szabelski A, Szameitat T, Sznajder P, Takekawa S, ter Wolbeek J, Tessaro S, Tessarotto F, Thibaud F, Uhl S, Uman I, Virius M, Wang L, Weisrock T, Wilfert M, Windmolders R, Wollny H, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zink A. Measurement of the charged-pion polarizability. PHYSICAL REVIEW LETTERS 2015; 114:062002. [PMID: 25723208 DOI: 10.1103/physrevlett.114.062002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Indexed: 06/04/2023]
Abstract
The COMPASS collaboration at CERN has investigated pion Compton scattering, π(-)γ→π(-)γ, at center-of-mass energy below 3.5 pion masses. The process is embedded in the reaction π(-)Ni→π(-)γNi, which is initiated by 190 GeV pions impinging on a nickel target. The exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, Q(2)<0.0015 (GeV/c)(2). From a sample of 63,000 events, the pion electric polarizability is determined to be α(π)=(2.0±0.6(stat)±0.7(syst))×10(-4) fm(3) under the assumption α(π)=-β(π), which relates the electric and magnetic dipole polarizabilities. It is the most precise measurement of this fundamental low-energy parameter of strong interaction that has been addressed since long by various methods with conflicting outcomes. While this result is in tension with previous dedicated measurements, it is found in agreement with the expectation from chiral perturbation theory. An additional measurement replacing pions by muons, for which the cross-section behavior is unambiguously known, was performed for an independent estimate of the systematic uncertainty.
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