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alt=\"Standard Model 2.1 page 4\" width=\"212\" height=\"300\" 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https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hyndsecphys\/uploads\/sites\/5088\/2016\/10\/2.1SM-004-724x1024.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEMT%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCWV1LXdlc3QtMSJHMEUCIGk%2F343DI%2B0l%2FHuCurRtf0vW0JG1uLLu%2BcFg1NpKwoHWAiEAnqk0m7XHiY6Piy%2FQme7CKtPIoK2g45t4K%2Fiu3k3ChRgqwQUIjP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARAFGgwyNzM1NzAxOTU0MzMiDL0jRvmACsl28MQgdyqVBT8yQ0OlGbOsoVzZ1RO1AzYqelgnLJSCn5JEFAr5YtQ7sbuGkbqOxwyVm4x3fuNH344g8GTwGHBPk2dxzXQaDz7Urpm%2BRDqQgs7bvnHS4j%2FpwvAqCEYs84BrfeGIKSdKuXYp0pMJsgiY3rz4H8zLW%2FOIUxVuq8Lx4SrNyPtbIwc%2BVRUIeSG%2BRMm16eEac0xoRj2N%2FhmYEOvPx7MEB2A%2BXteg2b%2Bx4IrOcMMTWK%2FSA83dRGwxzQSeaioEvOJw9B1%2Fe6EjfafXTda0eDRlbwQEDdvBPY5L6GYsAMS8YOGoOWtMAuC9CQj021Vn6%2BEs9CHJvVaXjiGDxZODmE%2FzJ3%2BKieJmVPCv2iGdj5IL85SpPwL4%2B5QN9emPWuvJfXRwcwfpoE4eLcQydyqTanqc2WtSgz%2Bo2SFgQppPKUQuI9xV%2F4friK9ckXg5%2FwtR%2BmOKTBIUf9b046zSJOt4TsPSYds61Q%2Bck3hq4XplyxvR6NKeKv3oPu6DvvZolWyFr0WVpGNsDTun8qNF0%2FV4OyOcSNfuvxzT3bSrw4WJCnN%2Fd7f%2FVWkWbqdkNUW%2BUkZ%2F1DsIum2ib46xs1DNTRbIQDFI5HcBVPf91WL4KofL2auv5Dlrbs7JU%2FAEeUKbWusZJZxhYifM85njKVWThxkBaUtwB8b3g90LFVTIU6mEt2cOAR6Enf4AT9b2ZwxICLaX%2FKzIRXVtaWJ9ZY4t5lkbLQzHxb8fL7AC%2BMjPGk94wFKZMnqy%2BApEPFbhmgLDDon2%2FGnMnaB3zA%2FqlXIoPQEgLvNnCMgclz7NPCdPc5HYF3gf6M1EAZ5YPd91tTzp89IIEJie3%2Frw64vGBd9SPLZMO4Vh5W5I%2BnCCjiaky2t%2BWswKbk%2BRWFUsrvdlRYgw9aKC0gY6sQHovbJMVjn5TPp72HguibI6OnSPWGPFbIGH9IT5dKV1OV4cBCph047Xgi19kFMmDsC%2FEkOVIuMQ2vqxrdr7iiT5lR96FWXgyJ7oPAvKQ9nMlu2PwirGAgxGwqomxYL4TYotZCpRDXiFQ3RZgQWeEWmo5%2BN6%2F9rNY2OGHczD%2FuXG910snD45n4Z7pdbpofNKZidjqtAtLb0MHUB7c25RpIWFDfrFufoFnmHUOtVMiYZXSL4%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U7M4DKV2B%2F20260628%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260628T034523Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=11a547e60864ade2b16d6773c46583e6110c4f8fceb5146ff467fbfcc66bb0d8 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